UJA1168TK/FDJ

UJA1168 Mini high-speed CAN system basis chip for partial networking Rev. 2 — 16 April 2014 Product data sheet 1. General description The UJA1168 is a mini high-speed CAN System Basis Chip (SBC) containing an ISO 11898-2/5/6 compliant HS-CAN transceiver and an integrated 5 V/100 mA supply for a microcontroller. It also features a watchdog and a Serial Peripheral Interface (SPI). The UJA1168 can be operated in very low-current Standby and Sleep modes with bus and local wake-up capability and supports ISO 11898-6 compliant CAN partial networking by means of a selective wake-up function. The microcontroller supply is switched off in Sleep mode. The UJA1168TK and UJA1168TK/FD versions contain a battery-related high-voltage output (INH) for controlling an external voltage regulator, while the UJA1168TK/VX and UJA1168TK/VX/FD are equipped with a 5 V sensor supply (VEXT). A dedicated implementation of the partial networking protocol has been embedded into the UJA1168/FD variants, UJA1168TK/FD and UJA1168TK/VX/FD (see Section 6.8.1 for further details on CAN FD). This function is called ‘FD-passive’ and is the ability to ignore CAN FD frames while waiting for a valid wake-up frame in Sleep/Standby mode. This additional feature of partial networking is the perfect fit for networks that support both CAN FD and standard CAN 2.0 communications. It allows normal CAN controllers that do not need to communicate CAN FD messages to remain in partial networking Sleep/Standby mode during CAN FD communication without generating bus errors. The UJA1168 implements the standard CAN physical layer as defined in the current ISO11898 standard (-2, -5 and -6). Pending the release of the updated version of ISO11898 including CAN FD, additional timing parameters defining loop delay symmetry are included. This implementation enables reliable communication in the CAN FD fast phase at data rates up to 2 Mbit/s. A number of configuration settings are stored in non-volatile memory, allowing the SBC to be adapted for use in a specific application. This makes it possible to configure the power-on behavior of the UJA1168 to meet the requirements of different applications. 2. Features and benefits 2.1 General  ISO 11898-2, ISO 11898-5 and ISO 11898-6 compliant high-speed CAN transceiver  Loop delay symmetry timing enables reliable communication at data rates up to 2 Mbit/s in the CAN FD fast phase  Autonomous bus biasing according to ISO 11898-6  Fully integrated 5 V/100 mA low-drop voltage regulator for 5 V microcontroller supply (V1)  Bus connections are truly floating when power to pin BAT is off UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking  No ‘false’ wake-ups due to CAN FD frame detection in UJA1168TK/FD and UJA1168TK/VX/FD 2.2 Designed for automotive applications  8 kV ElectroStatic Discharge (ESD) protection, according to the Human Body Model (HBM) on the CAN bus pins  6 kV ESD protection, according to IEC 61000-4-2 on the CAN bus pins, the sensor supply output VEXT and on pins BAT and WAKE  CAN bus pins short-circuit proof to 58 V  Battery and CAN bus pins protected against automotive transients according to ISO 7637-3  Very low quiescent current in Standby and Sleep modes with full wake-up capability  Leadless HVSON14 package (3.0 mm  4.5 mm) with improved Automated Optical Inspection (AOI) capability and low thermal resistance  Dark green product (halogen free and Restriction of Hazardous Substances (RoHS) compliant) 2.3 Low-drop voltage regulator for 5 V microcontroller supply (V1) 5 V nominal output; 2 % accuracy 100 mA output current capability Current limiting above 150 mA On-resistance of 5  (max) Support for microcontroller RAM retention down to a battery voltage of 2 V Undervoltage reset with selectable detection thresholds: 60 %, 70 %, 80 % or 90 % of output voltage  Excellent transient response with a 4.7 F ceramic output capacitor  Short-circuit to GND/overload protection on pin V1  Turned off in Sleep mode       2.4 Power Management  Standby mode featuring very low supply current; voltage V1 remains active to maintain the supply to the microcontroller  Sleep mode featuring very low supply current with voltage V1 switched off  Remote wake-up capability via standard CAN wake-up pattern or via ISO 11898-6 compliant selective wake-up frame detection  Local wake-up via the WAKE pin  Wake-up source recognition  Local and/or remote wake-up can be disabled to reduce current consumption  High-voltage output (INH) for controlling an external voltage (UJA1168TK and UJA1168TK/FD) 2.5 System control and diagnostic features  Mode control via the Serial Peripheral Interface (SPI)  Overtemperature warning and shutdown  Watchdog with independent clock source UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 2 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking        Watchdog can be operated in Window, Timeout and Autonomous modes Optional cyclic wake-up in watchdog Timeout mode Watchdog automatically re-enabled when wake-up event captured Watchdog period selectable between 8 ms and 4 s Supports remote flash programming via the CAN bus 16-, 24- and 32-bit SPI for configuration, control and diagnosis Bidirectional reset pin with variable power-on reset length to support a variety of microcontrollers  Configuration of selected functions via non-volatile memory 2.6 Sensor supply voltage (pin VEXT of UJA1168TK/VX and UJA1168TK/VX/FD)        5 V nominal output; 2 % accuracy 30 mA output current capability Current limiting above 30 mA Excellent transient response with a 4.7 F ceramic output load capacitor Protected against short-circuits to GND and to the battery High ESD robustness of 6 kV according to IEC 61000-4-2 Can handle negative voltages as low as 18 V 3. Ordering information Table 1. Ordering information Type number[1] UJA1168TK UJA1168TK/VX Package Name Description Version HVSON14 plastic thermal enhanced very thin small outline package; no leads; 14 terminals; body 3  4.5  0.85 mm SOT1086-2 UJA1168TK/FD[2] UJA1168TK/VX/FD[2] [1] UJA1168TK and UJA1168TK/FD contain a high-voltage output for controlling an external voltage regulator; UJA1168TK/X and UJA1168TK/VX/FD include a 5 V/30 mA sensor supply. [2] UJA1168TK/FD and UJA1168TK/VX/FD can be configured to recognize CAN FD frames as valid data frames, but will not wake up when a CAN FD frame is received (CAN FD-passive). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 3 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 4. Block diagram UJA1168 BAT 10 HIGH VOLTAGE OUTPUT(1) 7 INH(1)/VEXT(2) 5 V SENSOR SUPPLY(2) 5 5 V MICROCONTROLLER SUPPLY (V1) 3 RSTN V1 WATCHDOG RXD TXD 4 HS-CAN 1 13 12 CANH CANL PARTIAL NETWORKING CAN FD-passive(3) WAKE SCK SDI SDO SCSN 9 WAKE-UP 8 11 SPI 6 14 2 GND 015aaa254 (1) UJA1168TK and UJA1168TK/FD only. (2) UJA1168TK/VX and UJA1168TK/VX/FD only. (3) UJA1168TK/FD and UJA1168TK/VX/FD only. Fig 1. UJA1168 Product data sheet Block diagram of UJA1168 All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 4 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 5. Pinning information 5.1 Pinning terminal 1 index area TXD 1 14 SCSN GND 2 13 CANH V1 3 12 CANL RXD 4 RSTN 5 10 BAT SDO 6 9 WAKE INH/VEXT(1) 7 8 SCK UJA1168 11 SDI 015aaa253 Transparent top view (1) INH in the UJA1168TK and UJA1168TK/FD; VEXT in the UJA1168TK/VX and UJA1168TK/VX/FD Fig 2. Pin configuration diagram 5.2 Pin description Table 2. Pin Description TXD 1 transmit data input GND 2[1] ground V1 3 5 V microcontroller supply voltage RXD 4 receive data output; reads out data from the bus lines RSTN 5 reset input/output SDO 6 SPI data output INH 7 high-voltage output for switching external regulators (UJA1168TK and UJA1168TK/FD only) VEXT 7 sensor supply voltage (UJA1168TK/VX and UJA1168TK/VX/FD only) SCK 8 SPI clock input WAKE 9 local wake-up input BAT 10 battery supply voltage SDI 11 SPI data input CANL 12 LOW-level CAN bus line CANH 13 HIGH-level CAN bus line SCSN 14 SPI chip select input [1] UJA1168 Product data sheet Pin description Symbol The exposed die pad at the bottom of the package allows for better heat dissipation and grounding from the SBC via the printed circuit board. For enhanced thermal and electrical performance, it is recommended to solder the exposed die pad to GND. All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 5 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6. Functional description 6.1 System controller The system controller manages register configuration and controls the internal functions of the UJA1168. Detailed device status information is collected and made available to the microcontroller. 6.1.1 Operating modes The system controller contains a state machine that supports seven operating modes: Normal, Standby, Sleep, Reset, Forced Normal, Overtemp and Off. The state transitions are illustrated in Figure 3. 6.1.1.1 Normal mode Normal mode is the active operating mode. In this mode, all the hardware on the device is available and can be activated (see Table 3). Voltage regulator V1 is enabled to supply the microcontroller. The CAN interface can be configured to be active and thus to support normal CAN communication. Depending on the SPI register settings, the watchdog may be running in Window or Timeout mode and the INH/VEXT output may be active. Normal mode can be selected from Standby mode via an SPI command (MC = 111). 6.1.1.2 Standby mode Standby mode is the first-level power-saving mode of the UJA1168, offering reduced current consumption. The transceiver is unable to transmit or receive data in Standby mode. The SPI remains enabled and V1 is still active; the watchdog is active (in Timeout mode) if enabled. The behavior of INH/VEXT is determined by the SPI setting. If remote CAN wake-up is enabled (CWE = 1; see Table 37), the receiver monitors bus activity for a wake-up request. The bus pins are biased to GND (via Ri(cm)) when the bus is inactive for t > tto(silence) and at approximately 2.5 V when there is activity on the bus (autonomous biasing). CAN wake-up can occur via a standard wake-up pattern or via a selective wake-up frame (selective wake-up is enabled when CPNC = PNCOK = 1; otherwise standard wake-up is enabled). Pin RXD is forced LOW when any enabled wake-up event is detected. This can be either a regular wake-up (via the CAN bus or pin WAKE) or a diagnostic wake-up such as an overtemperature event (see Section 6.11). The UJA1168 switches to Standby mode via Reset mode: • from Off mode if the battery voltage rises above the power-on detection threshold (Vth(det)pon) • from Overtemp mode if the chip temperature falls below the overtemperature protection release threshold, Tth(rel)otp • from Sleep mode on the occurrence of a regular or diagnostic wake-up event Standby mode can also be selected from Normal mode via an SPI command (MC = 100). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 6 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking NORMAL MC = Sleep & no wake-up pending & wake-up enabled & SLPC = 0 MC = Normal MC = Standby SLEEP STANDBY MC = Sleep & no wake-up pending & wake-up enabled & SLPC = 0 from Normal or Standby MC = Sleep & (wake-up pending OR wake-up disabled) any reset event RSTN = HIGH V1 undervoltage no overtemperature wake-up event RESET OVERTEMP power-on any reset event FORCED NORMAL VBAT undervoltage OFF overtemperature event from RESET mode if FNMC = 1 from any mode from any mode except Off & Sleep MTP programming completed or MTP factory presets restored Fig 3. 015aaa270 UJA1168 system controller state diagram 6.1.1.3 Sleep mode Sleep mode is the second-level power-saving mode of the UJA1168. The difference between Sleep and Standby modes is that V1 is off in Sleep mode. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 7 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Any enabled regular wake-up via CAN or WAKE or any diagnostic wake-up event will cause the UJA1168 to wake up from Sleep mode. The behavior of INH/VEXT is determined by the SPI settings. The SPI and the watchdog are disabled. Autonomous bus biasing is active. Sleep mode can be selected from Normal or Standby mode via an SPI command (MC = 001). The UJA1168 will switch to Sleep mode on receipt of this command, provided there are no pending wake-up events and at least one regular wake-up source is enabled. Any attempt to enter Sleep mode while one of these conditions has not been met will cause the UJA1168 to switch to Reset mode and set the reset source status bits (RSS) to 10100 (‘illegal Sleep mode command received’; see Table 5). Since V1 is off in Sleep mode, the only way the SBC can exit Sleep mode is via a wake-up event (see Section 6.11). Sleep mode can be permanently disabled in applications where, for safety reasons, the supply voltage to the host controller must never be cut off. Sleep mode is permanently disabled by setting the Sleep control bit (SLPC) in the SBC configuration register (see Table 8) to 1. This register is located in the non-volatile memory area of the device. When SLPC = 1, a Sleep mode SPI command (MC = 001) triggers an SPI failure event instead of a transition to Sleep mode. 6.1.1.4 Reset mode Reset mode is the reset execution state of the SBC. This mode ensures that pin RSTN is pulled down for a defined time to allow the microcontroller to start up in a controlled manner. The transceiver is unable to transmit or receive data in Reset mode. The behavior of INH/VEXT is determined by the settings of bits VEXTC and VEXTSUC (see Section 6.6). The SPI is inactive; the watchdog is disabled; V1 and overtemperature detection are active. The UJA1168 switches to Reset mode from any mode in response to a reset event (see Table 5 for a list of reset sources). The UJA1168 exits Reset mode: • and switches to Standby mode if pin RSTN is released HIGH • and switches to Forced Normal mode if bit FNMC = 1 • if the SBC is forced into Off or Overtemp mode If a V1 undervoltage event forced the transition to Reset mode, the UJA1168 will remain in Reset mode until the voltage on pin V1 has recovered. After the UJA1168 exits Reset mode (positive edge on RSTN), an SPI read/write access must not be attempted for at least tto(SPI). Any earlier access may be ignored (without generating an SPI failure event). 6.1.1.5 Off mode The UJA1168 switches to Off mode when the battery is first connected or from any mode when VBAT < Vth(det)poff. Only power-on detection is enabled; all other modules are inactive. The UJA1168 starts to boot up when the battery voltage rises above the UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 8 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking power-on detection threshold Vth(det)pon (triggering an initialization process) and switches to Reset mode after tstartup. In Off mode, the CAN pins disengage from the bus (zero load; high-ohmic). 6.1.1.6 Overtemp mode Overtemp mode is provided to prevent the UJA1168 being damaged by excessive temperatures. The UJA1168 switches immediately to Overtemp mode from any mode (other than Off mode or Sleep mode) when the global chip temperature rises above the overtemperature protection activation threshold, Tth(act)otp. To help prevent the loss of data due to overheating, the UJA1168 issues a warning when the IC temperature rises above the overtemperature warning threshold (Tth(warn)otp). When this happens, status bit OTWS is set and an overtemperature warning event is captured (OTW = 1), if enabled (OTWE = 1). In Overtemp mode, the CAN transmitter and receiver are disabled and the CAN pins are in a high-ohmic state. No wake-up event will be detected, but a pending wake-up will still be signalled by a LOW level on pin RXD, which will persist after the overtemperature event has been cleared. V1 is off and pin RSTN is driven LOW after td(uvd)V1. In the UJA1168TK/VX and UJA1168TK/VX/FD, VEXT is off. In the UJA1168TK and UJA1168TK/FD, INH remains unchanged when the SBC enters Overtemp mode. The UJA1168 exits Overtemp mode: • and switches to Reset mode if the chip temperature falls below the overtemperature protection release threshold, Tth(rel)otp • if the device is forced to switch to Off mode (VBAT < Vth(det)poff) 6.1.1.7 Forced Normal mode Forced Normal mode simplifies SBC testing and is useful for initial prototyping and failure detection, as well as first flashing of the microcontroller. The watchdog is disabled in Forced Normal mode. The low-drop voltage regulator (V1) is active, VEXT/INH is enabled and the CAN transceiver is active. Bit FNMC is factory preset to 1, so the UJA1168 initially boots up in Forced Normal mode (see Table 8). This allows a newly installed device to be run in Normal mode without a watchdog. So the microcontroller can be flashed via the CAN bus in the knowledge that a watchdog timer overflow will not trigger a system reset. The register containing bit FNMC (address 74h) is stored in non-volatile memory (see Section 6.12). So once bit FNMC is programmed to 0, the SBC will no longer boot up in Forced Normal mode, allowing the watchdog to be enabled. Even in Forced Normal mode, a reset event (e.g. an external reset or a V1 undervoltage) will trigger a transition to Reset mode with normal Reset mode behavior (except that the transmitter remains active if there is no V1 undervoltage). However, when the UJA1168 exits Reset mode, it will return to Forced Normal mode instead of switching to Standby mode. In Forced Normal mode, only the Main status register, the Watchdog status register, the Identification register and registers stored in non-volatile memory can be read. The non-volatile memory area is fully accessible for writing as long as the UJA1168 is in the factory preset state (for details see Section 6.12). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 9 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking The UJA1168 switches from Reset mode to Forced Normal mode if bit FNMC = 1. 6.1.1.8 Table 3. Block Hardware characterization for the UJA1168 operating modes Hardware characterization by functional block Operating mode Off Forced Normal Standby Normal Sleep Reset Overtemp V1 off[1] on on on off on off VEXT/INH off on determined by determined by bits VEXTC and bits VEXTC VEXTSUC and VEXTSUC (see Table 12) determined by bits VEXTC and VEXTSUC determined VEXT off; by bits INH VEXTC and unchanged VEXTSUC RSTN LOW HIGH HIGH HIGH LOW LOW LOW SPI disabled active active active disabled disabled disabled Watchdog off off determined by determined by bits bits WMC (see WMC Table 7)[2] determined by off bits WMC[2] off CAN off Active Offline Active/ Offline/ Listen-only (determined by bits CMC; see Table 14) Offline Offline off RXD V1 level CAN bit stream V1 level/LOW if wake-up detected CAN bit stream if CMC = 01/10/11; otherwise same as Standby/Sleep V1 level/LOW if wake-up detected V1 level/LOW if wake-up detected V1 level/LOW if wake-up detected [1] When the SBC switches from Reset, Standby or Normal mode to Off mode, V1 behaves as a current source during power down while VBAT is between 3 V and 2 V. [2] Window mode is only active in Normal mode. 6.1.2 System control registers The operating mode is selected via bits MC in the Mode control register. The Mode control register is accessed via SPI address 0x01 (see Section 6.16). Table 4. Mode control register (address 01h) Bit Symbol Access Value 7:3 reserved R 2:0 MC R/W Description mode control: 001 Sleep mode 100 Standby mode 111 Normal mode The Main status register can be accessed to monitor the status of the overtemperature warning flag and to determine whether the UJA1168 has entered Normal mode after initial power-up. It also indicates the source of the most recent reset event. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 10 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 5. Main status register (address 03h) Bit Symbol Access Value 7 reserved R 6 OTWS R 5 4:0 NMS RSS Description overtemperature warning status: 0 IC temperature below overtemperature warning threshold 1 IC temperature above overtemperature warning threshold R Normal mode status: 0 UJA1168 has entered Normal mode (after power-up) 1 UJA1168 has powered up but has not yet switched to Normal mode R reset source status: 00000 exited Off mode (power-on) 00001 CAN wake-up in Sleep mode 00100 wake-up via WAKE pin in Sleep mode 01100 watchdog overflow in Sleep mode (Timeout mode) 01101 diagnostic wake-up in Sleep mode 01110 watchdog triggered too early (Window mode) 01111 watchdog overflow (Window mode or Timeout mode with WDF = 1) 10000 illegal watchdog mode control access 10001 RSTN pulled down externally 10010 exited Overtemp mode 10011 V1 undervoltage 10100 illegal Sleep mode command received 10110 wake-up from Sleep mode due to a frame detect error 6.2 Watchdog The UJA1168 contains a watchdog that supports three operating modes: Window, Timeout and Autonomous. In Window mode (available only in SBC Normal mode), a watchdog trigger event within a closed watchdog window resets the watchdog timer. In Timeout mode, the watchdog runs continuously and can be reset at any time within the timeout time by a watchdog trigger. Watchdog timeout mode can also be used for cyclic wake-up of the microcontroller. In Autonomous mode, the watchdog can be off or in Timeout mode (see Section 6.2.4). The watchdog mode is selected via bits WMC in the Watchdog control register (Table 7). The SBC must be in Standby mode when the watchdog mode is changed. If Window mode is selected (WMC = 100), the watchdog will remain in (or switch to) Timeout mode until the SBC enters Normal mode. Any attempt to change the watchdog operating mode (via WMC) while the SBC is in Normal mode will cause the UJA1168 to switch to Reset mode and the reset source status bits (RSS) will be set to 10000 (‘illegal watchdog mode control access’; see Table 5). Eight watchdog periods are supported, from 8 ms to 4096 ms. The watchdog period is programmed via bits NWP. The selected period is valid for both Window and Timeout modes. The default watchdog period is 128 ms. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 11 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking A watchdog trigger event resets the watchdog timer. A watchdog trigger event is any valid write access to the Watchdog control register. If the watchdog mode or the watchdog period have changed as a result of the write access, the new values are immediately valid. Table 6. Summary of watchdog settings Watchdog configuration via SPI FNMC 0 0 0 0 1 SDMC x x 0 1 x WMC 100 (Window) 010 (Timeout) 001 (Autonomous) 001 (Autonomous) n.a. Normal mode Window Timeout Timeout off off Timeout Timeout off off off Timeout Timeout Timeout off off Timeout Timeout off off off off off off off off SBC Standby mode (RXD HIGH) Operating Standby mode (RXD LOW) Mode Sleep mode Other modes Table 7. Watchdog control register (address 00h) Bit Symbol Access Value Description 7:5 WMC R/W watchdog mode control: 4 reserved R 3:0 NWP R/W 001[1] Autonomous mode 010[2] Timeout mode 100[3] Window mode nominal watchdog period 1000 8 ms 0001 16 ms 0010 32 ms 1011 64 ms 0100[2] 128 ms 1101 256 ms 1110 1024 ms 0111 4096 ms [1] Default value if SDMC = 1 (see Section 6.2.1) [2] Default value. [3] Selected in Standby mode but only activated when the SBC switches to Normal mode. The watchdog is a valuable safety mechanism, so it is critical that it is configured correctly. Two features are provided to prevent watchdog parameters being changed by mistake: • redundant states of configuration bits WMC and NWP • reconfiguration protection in Normal mode Redundant states associated with control bits WMC and NWP ensure that a single bit error cannot cause the watchdog to be configured incorrectly (at least two bits must be changed to reconfigure WMC or NWP). If an attempt is made to write an invalid code to WMC or NWP (e.g. 011 or 1001 respectively), the SPI operation is abandoned and an SPI failure event is captured, if enabled (see Section 6.11). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 12 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Two operating modes have a major impact on the operation of the watchdog: Forced Normal mode and Software Development mode (Software Development mode is provided for test purposes and is not an SBC operating mode; the UJA1168 can be in any mode with Software Development mode enabled; see Section 6.2.1). These modes are enabled and disabled via bits FNMC and SDMC respectively in the SBC configuration control register (see Table 8). Note that this register is located in the non-volatile memory area (see Section 6.11). In Forced Normal mode (FNM), the watchdog is completely disabled. In Software Development mode (SDM), the watchdog can be disabled or activated for test purposes. Information on the status of the watchdog is available from the Watchdog status register (Table 9). This register also indicates whether Forced Normal and Software Development modes are active. Table 8. Bit Symbol Access Value 7:6 reserved R 5:4 V1RTSUC R/W 3 2 FNMC SDMC R 0 SLPC R/W V1 undervoltage detection at 90 % of nominal value at start-up (V1RTC = 00) 01 V1 undervoltage detection at 80 % of nominal value at start-up (V1RTC = 01) 10 V1 undervoltage detection at 70 % of nominal value at start-up (V1RTC = 10) 11 V1 undervoltage detection at 60 % of nominal value at start-up (V1RTC = 11) Forced Normal mode control: 0 Forced Normal mode disabled 1[1] Forced Normal mode enabled Software Development mode control: 0[1] Software Development mode disabled 1 Software Development mode enabled Sleep control: 0[1] the SBC supports Sleep mode 1 Sleep mode commands will be ignored Factory preset value. Table 9. Watchdog status register (address 05h) Bit Symbol Access Value 7:4 reserved R 3 FNMS R 2 Product data sheet V1 reset threshold (defined by bit V1RTC) at start-up: 00[1] R/W reserved Description - R/W 1 [1] UJA1168 SBC configuration control register (address 74h) SDMS R Description 0 SBC is not in Forced Normal mode 1 SBC is in Forced Normal mode 0 SBC is not in Software Development mode 1 SBC is in Software Development mode All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 13 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 9. Watchdog status register (address 05h) Bit Symbol Access Value Description 1:0 WDS R watchdog status: 00 watchdog is off 01 watchdog is in first half of window 10 watchdog is in second half of window 11 reserved 6.2.1 Software Development mode Software Development mode is provided to simplify the software design process. When Software Development mode is enabled, the watchdog starts up in Autonomous mode (WMC = 001) and is inactive after a system reset, overriding the default value (see Table 7). The watchdog is always off in Autonomous mode if Software Development mode is enabled (SDMC = 1; see Table 10). Software can be run without a watchdog in Software Development mode. However, it is possible to activate and deactivate the watchdog for test purposes by selecting Window or Timeout mode via bits WMC while the SBC is in Standby mode (note that Window mode will only be activated when the SBC switches to Normal mode). Software Development mode is activated via bits SDMC in non-volatile memory (see Table 8). 6.2.2 Watchdog behavior in Window mode The watchdog runs continuously in Window mode. The watchdog will be in Window mode if WMC = 100 and the UJA1168 is in Normal mode. In Window mode, the watchdog can only be triggered during the second half of the watchdog period. If the watchdog overflows, or is triggered in the first half of the watchdog period (before ttrig(wd)1), a system reset is performed. After the system reset, the reset source (either ‘watchdog triggered too early’ or ‘watchdog overflow’) can be read via the reset source status bits (RSS) in the Main Status register (Table 5). If the watchdog is triggered in the second half of the watchdog period (after ttrig(wd)1 but before ttrig(wd)2), the watchdog timer is restarted. 6.2.3 Watchdog behavior in Timeout mode The watchdog runs continuously in Timeout mode. The watchdog will be in Timeout mode if WMC = 010 and the UJA1168 is in Normal, Standby or Sleep mode. The watchdog will also be in Timeout mode if WMC = 100 and the UJA1168 is in Standby or Sleep mode. If Autonomous mode is selected (WMC = 001), the watchdog will be in Timeout mode if one of the conditions for Timeout mode listed in Table 10 has been satisfied. In Timeout mode, the watchdog timer can be reset at any time by a watchdog trigger. If the watchdog overflows, a watchdog failure event (WDF) is captured. If a WDF is already pending when the watchdog overflows, a system reset is performed. In Timeout mode, the watchdog can be used as a cyclic wake-up source for the microcontroller when the UJA1168 is in Standby or Sleep mode. In Sleep mode, a watchdog overflow generates a wake-up event. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 14 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking When the SBC is in Sleep mode with watchdog Timeout mode selected, a wake-up event is generated after the nominal watchdog period (NWP). If bit WDF is set, RXD is forced LOW and V1 is turned on. The application software can then clear the WDF bit and trigger the watchdog before it overflows. 6.2.4 Watchdog behavior in Autonomous mode Autonomous mode is selected when WMC = 001. In Autonomous mode, the watchdog is either off or in Timeout mode, according to the conditions detailed in Table 10. Table 10. Watchdog status in Autonomous mode UJA1168 Operating mode Watchdog status SDMC = 0 SDMC = 1 Normal Timeout mode off Standby; RXD HIGH off off Sleep off off any other mode off off Standby; RXD LOW Timeout mode off When Autonomous mode is selected, the watchdog will be in Timeout mode if the SBC is in Normal mode or Standby mode with RXD LOW, provided Software Development mode has been disabled (SDMC = 0). Otherwise the watchdog will be off. In Autonomous mode, the watchdog will not be running when the SBC is in Standby (RXD HIGH) or Sleep mode. If a wake-up event is captured, pin RXD is forced LOW to signal the event and the watchdog is automatically restarted in Timeout mode. If the SBC was in Sleep mode when the wake-up event was captured, it switches to Standby mode. 6.3 System reset When a system reset occurs, the SBC switches to Reset mode and initiates process that generates a low-level pulse on pin RSTN. 6.3.1 Characteristics of pin RSTN Pin RSTN is a bidirectional open drain low side driver with integrated pull-up resistance, as shown in Figure 4. With this configuration, the SBC can detect the pin being pulled down externally, e.g. by the microcontroller. The input reset pulse width must be at least tw(rst). V1 RSTN 015aaa276 Fig 4. UJA1168 Product data sheet RSTN internal pin configuration All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 15 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.3.2 Selecting the output reset pulse width The duration of the output reset pulse is selected via bits RLC in the Start-up control register (Table 11). The SBC distinguishes between a cold start and a warm start. A cold start is performed if the reset event was combined with a V1 undervoltage event (power-on reset, reset during Sleep mode, over-temperature reset, V1 undervoltage before entering or while in Reset Mode). The output reset pulse width for a cold start is determined by the setting of bits RLC. If any other reset event occurs without a V1 undervoltage (external reset, watchdog failure, watchdog change attempt in Normal mode, illegal Sleep mode command) the SBC uses the shortest reset length (tw(rst) = 1 ms to 1.5 ms). This is called warm start of the microcontroller. Table 11. Bit Start-up control register (address 73h) Symbol Access Value 7:6 reserved R 5:4 RLC R/W 3 2:0 [1] RSTN output reset pulse width: 00[1] tw(rst) = 20 ms to 25 ms 01 tw(rst) = 10 ms to 12.5 ms 10 tw(rst) = 3.6 ms to 5 ms 11 tw(rst) = 1 ms to 1.5 ms VEXTSUC R/W reserved R Description VEXT/INH start-up control: 0[1] bits VEXTC set to 00 at power-up 1 bits VEXTC set to 11 at power-up - Factory preset value. 6.3.3 Reset sources The following events will cause the UJA1168 to switch to Reset mode: UJA1168 Product data sheet • • • • • • VV1 drops below the selected V1 undervoltage threshold defined by bits V1RTC • • • • • • the SBC leaves Off mode pin RSTN is pulled down externally the watchdog overflows in Window mode the watchdog is triggered too early in Window mode (before ttrig(wd)1) the watchdog overflows in Timeout mode with WDF = 1 (watchdog failure pending) an attempt is made to reconfigure the Watchdog control register while the SBC is in Normal mode local or CAN bus wake-up in Sleep mode diagnostic wake-up in Sleep mode the SBC leaves Overtemp mode illegal Sleep mode command received wake-up from Sleep mode due to a frame detect error All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 16 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.4 Global temperature protection The temperature of the UJA1168 is monitored continuously, except in Sleep and Off modes. The SBC switches to Overtemp mode if the temperature exceeds the overtemperature protection activation threshold, Tth(act)otp. In addition, pin RSTN is driven LOW and V1, VEXT and the CAN transceiver are switched off. When the temperature drops below the overtemperature protection release threshold, Tth(rel)otp, the SBC switches to Standby mode via Reset mode. In addition, the UJA1168 provides an overtemperature warning. When the IC temperature rises about the overtemperature warning threshold (Tth(warn)otp), status bit OTWS is set and an overtemperature warning event is captured (OTW = 1). 6.5 Power supplies 6.5.1 Battery supply voltage (VBAT) The internal circuitry is supplied from the battery via pin BAT. The device needs to be protected against negative supply voltages, e.g. by using an external series diode. If VBAT falls below the power-off detection threshold, Vth(det)poff, the SBC switches to Off mode. However, the microcontroller supply voltage (V1) remains active until VBAT falls below 2 V. The SBC switches from Off mode to Reset mode tstartup after the battery voltage rises above the power-on detection threshold, Vth(det)pon. Power-on event status bit PO is set to 1 to indicate the UJA1168 has powered up and left Off mode (see Table 31). 6.5.2 Low-drop voltage supply for 5 V microcontroller (V1) V1 is intended to supply the microcontroller and the internal CAN transceiver and delivers up to 150 mA at 5 V. The output voltage on V1 is monitored. A system reset is generated if the voltage on V1 drops below the selected undervoltage threshold (60 %, 70 %, 80 % or 90 % of the nominal V1 output voltage, selected via V1RTC in the V1 and INH/VEXT control register; see Table 12). The internal CAN transceiver consumes 50 mA (max) when the bus is continuously dominant, leaving 100 mA available for the external load on pin V1. In practice, the typical current consumption of the CAN transceiver is lower (25 mA), depending on the application, leaving more current available for the load. The default value of the undervoltage threshold at power-up is determined by the value of bits V1RTSUC in the SBC configuration control register (Table 8). The SBC configuration control register is in non-volatile memory, allowing the user to define the undervoltage threshold (V1RTC) at start-up. In addition, an undervoltage warning (a V1U event; see Section 6.11) is generated if the voltage on V1 falls below 90 % of the nominal value (and V1U event detection is enabled, V1UE = 1; see Table 36). This information can be used as a warning, when the 60 %, 70 % or 80 % threshold is selected, to indicate that the level on V1 is outside the nominal supply range. The status of V1, whether it is above or below the 90 % undervoltage threshold, can be read via bit V1S in the Supply voltage status register (Table 13). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 17 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 12. V1 and INH/VEXT control register (address 10h) Bit Symbol Access Value 7:4 reserved R 3:2 VEXTC[1] R/W VEXT/INH configuration: 00 VEXT/INH off in all modes 01 VEXT/INH on in Normal mode 10 VEXT/INH on in Normal, Standby and Reset modes 11 1:0 Description V1RTC[2] R/W VEXT/INH on in Normal, Standby, Sleep and Reset modes set V1 reset threshold: 00 reset threshold set to 90 % of V1 nominal output voltage 01 reset threshold set to 80 % of V1 nominal output voltage 10 reset threshold set to 70 % of V1 nominal output voltage 11 reset threshold set to 60 % of V1 nominal output voltage [1] Default value at power-up defined by setting of bits VEXTSUC (see Table 11). [2] Default value at power-up defined by setting of bits V1RTSUC (see Table 8). Table 13. Supply voltage status register (address 1Bh) Bit Symbol Access Value 7:3 reserved R - 2:1 VEXTS[1] R/W 0 V1S Description VEXT status: 00[2] VEXT voltage ok 01 VEXT output voltage below undervoltage threshold 10 VEXT output voltage above overvoltage threshold 11 VEXT disabled R/W V1 status: 0[2] V1 output voltage above 90 % undervoltage threshold 1 V1 output voltage below 90 % undervoltage threshold [1] UJA1168TK/VX only; status will always be 00 in the UJA1168TK. [2] Default value at power-up. 6.6 High voltage output (UJA1168TK, UJA1168TK/FD) and external sensor supply (UJA1168TK/VX, UJA1168TK/VX/FD) Depending on the device version, pin 7 is a high voltage output (INH) or an external sensor supply (VEXT). In the UJA1168TK and UJA1168TK/FD, the INH pin can be used to control external devices, such as voltage regulators. Depending on the setting of bits VEXTC, pin INH will either be disabled (to disable external devices) or at a battery-related HIGH level (to enable external devices) in selected SBC operating modes (see Table 12). To ensure external devices are not disabled due to an overtemperature event, pin INH does not change state when the SBC switches to Overtemp mode. In the UJA1168TK/VX and UJA1168TK/VX/FD, the VEXT pin is a voltage output intended to supply external components, delivering up to 30 mA at 5 V. Like INH, VEXT is also configured via bits VEXTC in the V1 and INH/VEXT control register (Table 12). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 18 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking The default value of VEXTC at power-on is defined by bits VEXTSUC in non-volatile memory (see Section 6.12). In contrast to pin INH, pin VEXT is disabled when the SBC switches to Overtemp mode. The status of VEXT can be read from the Supply voltage status register (Table 13). 6.7 High-speed CAN transceiver The integrated high-speed CAN transceiver is designed for active communication at bit rates up to 1 Mbit/s, providing differential transmit and receive capability to a CAN protocol controller. The transceiver is ISO 11898-2, ISO 11898-5 and ISO 11898-6 compliant (defining high-speed CAN with selective wake-up functionality and autonomous biasing). The CAN transmitter is supplied from V1. The UJA1168 includes additional timing parameters on loop delay symmetry to ensure reliable communication in fast phase at data rates up to 2 Mbit/s, as used in CAN FD networks. The CAN transceiver supports autonomous CAN biasing as defined in ISO 11898-6, which helps to minimize RF emissions. CANH and CANL are always biased to 2.5 V when the transceiver is in Active or Listen-only modes (CMC = 01/10/11). Autonomous biasing is active in CAN Offline mode - to 2.5 V if there is activity on the bus (CAN Offline Bias mode) and to GND if there is no activity on the bus for t > tto(silence) (CAN Offline mode). This is useful when the node is disabled due to a malfunction in the microcontroller or when CAN partial networking is enabled. The SBC ensures that the CAN bus is correctly biased to avoid disturbing ongoing communication between other nodes. The autonomous CAN bias voltage is derived directly from VBAT. 6.7.1 CAN operating modes The integrated CAN transceiver supports four operating modes: Active, Listen-only, Offline and Offline Bias (see Figure 5). The CAN transceiver operating mode depends on the UJA1168 operating mode and on the setting of bits CMC in the CAN control register (Table 14). When the UJA1168 is in Normal mode, the CAN transceiver operating mode (Active, Listen-only or Offline) can be selected via bits CMC in the CAN control register (Table 14). When the UJA1168 is in Standby or Sleep modes, the transceiver is forced to Offline or Offline Bias mode (depending on bus activity). 6.7.1.1 CAN Active mode In CAN Active mode, the transceiver can transmit and receive data via CANH and CANL. The differential receiver converts the analog data on the bus lines into digital data, which is output on pin RXD. The transmitter converts digital data generated by the CAN controller (input on pin TXD) into analog signals suitable for transmission over the CANH and CANL bus lines. CAN Active mode is selected when CMC = 01 or 10. When CMC = 01, V1/CAN undervoltage detection is enabled and the transceiver will go to CAN Offline or CAN Offline Bias mode when the voltage on V1 drops below the 90 % threshold. When CMC = 10, V1/CAN undervoltage detection is disabled. The transmitter will remain active UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 19 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking until the voltage on V1 drops below the V1 reset threshold (selected via bits V1RTC). The SBC will then switch to Reset mode and the transceiver will switch to CAN Offline or CAN Offline Bias mode. The CAN transceiver is in Active mode when: • the UJA1168 is in Normal mode (MC = 111) and the CAN transceiver has been enabled by setting bits CMC in the CAN control register to 01 or 10 (see Table 14) and: – if CMC = 01, the voltage on pin V1 is above the 90 % undervoltage threshold – if CMC = 10, the voltage on pin V1 is above the V1 reset threshold If pin TXD is held LOW (e.g. by a short-circuit to GND) when CAN Active mode is selected via bits CMC, the transceiver will not enter CAN Active mode but will switch to or remain in CAN Listen-only mode. It will remain in Listen-only mode until pin TXD goes HIGH in order to prevent a hardware and/or software application failure from driving the bus lines to an unwanted dominant state. In CAN Active mode, the CAN bias voltage is derived from V1. The application can determine whether the CAN transceiver is ready to transmit/receive data or is disabled by reading the CAN Transceiver Status (CTS) bit in the Transceiver Status Register (Table 15). 6.7.1.2 CAN Listen-only mode CAN Listen-only mode allows the UJA1168 to monitor bus activity while the transceiver is inactive, without influencing bus levels. This facility could be used by development tools that need to listen to the bus but do not need to transmit or receive data or for software-driven selective wake-up. Dedicated microcontrollers could be used for selective wake-up, providing an embedded low-power CAN engine designed to monitor the bus for potential wake-up events. In Listen-only mode the CAN transmitter is disabled, reducing current consumption. The CAN receiver and CAN biasing remain active. This enables the host microcontroller to switch to a low-power mode in which an embedded CAN protocol controller remains active, waiting for a signal to wake up the microcontroller. The CAN transceiver is in Listen-only mode when: • the UJA1168 is in Normal mode and CMC = 11 The CAN transceiver will not leave Listen-only mode while TXD is LOW or CAN Active mode is selected with CMC = 01 while the voltage on V1 is below the 90 % undervoltage threshold. 6.7.1.3 CAN Offline and Offline Bias modes In CAN Offline mode, the transceiver monitors the CAN bus for a wake-up event, provided CAN wake-up detection is enabled (CWE = 1). CANH and CANL are biased to GND. CAN Offline Bias mode is the same as CAN Offline mode, with the exception that the CAN bus is biased to 2.5 V. This mode is activated automatically when activity is detected on the CAN bus while the transceiver is in CAN Offline mode. The transceiver will return to CAN Offline mode if the CAN bus is silent (no CAN bus edges) for longer than tto(silence). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 20 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking The CAN transceiver switches to CAN Offline mode from CAN Active mode or CAN Listen-only mode if: • the SBC switches to Reset or Standby or Sleep mode OR • the SBC is in Normal mode and CMC = 00 provided the CAN-bus has been inactive for at least tto(silence). If the CAN-bus has been inactive for less than tto(silence), the CAN transceiver switches first to CAN Offline Bias mode and then to CAN Offline mode once the bus has been silent for tto(silence). The CAN transceiver switches to CAN Offline/Offline Bias mode from CAN Active mode if CMC = 01 and the voltage on V1 drops below the 90 % undervoltage threshold or CMC = 10 and the voltage on V1 drops below the V1 reset threshold. The CAN transceiver switches to CAN Offline mode: • from CAN Offline Bias mode if no activity is detected on the bus (no CAN edges) for t > tto(silence) OR • when the SBC switches from Off or Overtemp mode to Reset mode The CAN transceiver switches from CAN Offline mode to CAN Offline Bias mode if: • a standard wake-up pattern (according to ISO11898-5/-6) is detected on the CAN bus OR • the SBC is in Normal mode, CMC = 01 and VV1 < 90 % 6.7.1.4 CAN Off mode The CAN transceiver is switched off completely with the bus lines floating when: • the SBC switches to Off or Overtemp mode OR • VBAT falls below the CAN receiver undervoltage detection threshold, Vuvd(CAN) It will be switched on again on entering CAN Offline mode when VBAT rises above the undervoltage recovery threshold (Vuvr(CAN)) and the SBC is no longer in Off/Overtemp mode. CAN Off mode prevents reverse currents flowing from the bus when the battery supply to the SBC is lost. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 21 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking &$1$FWLYH >5HVHW256WDQGE\ 256OHHS25 1RUPDO &0& 25 &0&  9925 &0&  99957&@ W!WWRVLOHQFH 1RUPDO  >&0&  99!25 &0&  99!957&@ 1RUPDO  >&0&  99!25 &0&  99!957&@ 1RUPDO &0&  >5HVHW256WDQGE\ 256OHHS25 1RUPDO &0& 25 &0&  9925 &0&  99957&@ WWWRVLOHQFH 1RUPDO  >&0&  99!25 &0&  99!957&@ 1RUPDO &0&  &$12IIOLQH%LDV WUDQVPLWWHURII UHFHLYHURII 5;'ZDNHXSLQW &$1+&$1/WHUPLQDWHG WR9IURP9%$7  WUDQVPLWWHURQ UHFHLYHURQ 5;'ELWVWUHDP &$1+&$1/WHUPLQDWHG WR9§9 1RUPDO &0&  99 &$1/LVWHQRQO\ WUDQVPLWWHURII UHFHLYHURQ 5;'ELWVWUHDP &$1+&$1/WHUPLQDWHG WR9IURP9%$7  >5HVHW256WDQGE\256OHHS25 1RUPDO &0& @ WWWRVLOHQFH IURPDOOPRGHV W!WWRVLOHQFH 1RUPDO &0&  &$1EXVZDNHXS25 1RUPDO &0&  99 >5HVHW256WDQGE\256OHHS25 1RUPDO &0& @ W!WWRVLOHQFH 2II25 2YHUWHPS25 9%$79XYG&$1 &$12IIOLQH WUDQVPLWWHURII UHFHLYHURII 5;'ZDNHXSLQW &$1+&$1/WHUPLQDWHG WR*1' &$12II WUDQVPLWWHURII UHFHLYHURII 5;'ZDNHXSLQW &$1+&$1/IORDWLQJ OHDYLQJ2II2YHUWHPS 9%$7!9XYU&$1 DDD (1) To prevent the bus lines being driven to a permanent dominant state, the transceiver will not switch to CAN Active mode or CAN Listen-only mode if pin TXD is held LOW (e.g. by a short-circuit to GND) Fig 5. CAN transceiver state machine (with FNMC = 0) 6.7.2 CAN standard wake-up (partial networking not enabled) If the CAN transceiver is in Offline mode and CAN wake-up is enabled (CWE = 1), but CAN selective wake-up is disabled (CPNC = 0 or PNCOK = 0), the UJA1168 will monitor the bus for a wake-up pattern. A filter at the receiver input prevents unwanted wake-up events occurring due to automotive transients or EMI. A dominant-recessive-dominant wake-up pattern must be transmitted on the CAN bus within the wake-up timeout time (tto(wake)) to pass the wake-up filter and trigger a wake-up event (see Figure 6; note that additional pulses may occur between the recessive/dominant phases). The recessive and dominant phases must last UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 22 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking at least twake(busrec) and twake(busdom), respectively. GRPLQDQW WGRP•WZDNHEXVGRP UHFHVVLYH GRPLQDQW WUHF•WZDNHEXVUHF WGRP•WZDNHEXVGRP WZDNHWWRZDNH &$1ZDNHXS DDD Fig 6. CAN wake-up timing When a valid CAN wake-up pattern is detected on the bus, wake-up bit CW in the Transceiver event status register is set (see Table 33) and pin RXD is driven LOW. If the SBC was in Sleep mode when the wake-up pattern was detected, V1 is enabled to supply the microcontroller and the SBC switches to Standby mode via Reset mode. 6.7.3 CAN control and Transceiver status registers Table 14. Symbol Access Value 7 reserved R/W 6 CFDC R/W 5 4 UJA1168 Product data sheet CAN control register (address 20h) Bit PNCOK CPNC CAN FD tolerance (UJA1168TK/FD and UJA1168TK/VX/FD only; otherwise ignored) 0 CAN FD tolerance disabled 1 CAN FD tolerance enabled R/W CAN partial networking configuration registers: 0 partial networking register configuration invalid (wake-up via standard wake-up pattern only) 1 partial networking registers configured successfully R/W 3:2 reserved R 1:0 CMC R/W Description CAN selective wake-up; when enabled, node is part of a partial network: 0 disable CAN selective wake-up 1 enable CAN selective wake-up CAN transceiver operating mode selection (available when UJA1168 is in Normal mode; MC = 111): 00 Offline mode 01 Active mode (when the SBC is in Normal mode); V1/CAN undervoltage detection active 10 Active mode (when the SBC is in Normal mode); V1/CAN undervoltage detection disabled 11 Listen-only mode All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 23 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 15. Bit Symbol Access Value Description 7 CTS R 0 CAN transceiver not in Active mode 1 CAN transceiver in Active mode 6 CPNERR R 0 no CAN partial networking error detected (PNFDE = 0 AND PNCOK = 1) 1 CAN partial networking error detected (PNFDE = 1 OR PNCOK = 0; wake-up via standard wake-up pattern only) CAN partial networking configuration error detected (PNCOK = 0) 5 CPNS R 0 1 CAN partial networking configuration ok (PNCOK = 1) 4 COSCS R 0 CAN partial networking oscillator not running at target frequency 1 CAN partial networking oscillator running at target frequency 0 CAN bus active (communication detected on bus) 1 CAN bus inactive (for longer than tto(silence)) 3 R reserved R - 1 VCS[1] R 0 the output voltage on V1 is above the 90 % threshold 1 the output voltage on V1 is below the 90 % threshold 0 no TXD dominant timeout event detected 1 CAN transmitter disabled due to a TXD dominant timeout event [1] Product data sheet CBSS 2 0 UJA1168 Transceiver status register (address 22h) CFS R Only active when CMC = 01. All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 24 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.8 CAN partial networking Partial networking allows nodes in a CAN network to be selectively activated in response to dedicated wake-up frames (WUF). Only nodes that are functionally required are active on the bus while the other nodes remain in a low-power mode until needed. If both CAN wake-up (CWE = 1) and CAN selective wake-up (CPNC = 1) are enabled, and the partial networking registers are configured correctly (PNCOK = 1), the transceiver monitors the bus for dedicated CAN wake-up frames. A wake-up frame is a CAN frame according to ISO11898-1, consisting of an identifier field (ID), a Data Length Code (DLC), a data field and a Cyclic Redundancy Check (CRC) code including the CRC delimiter. The wake-up frame format, standard (11-bit) or extended (29-bit) identifier, is selected via bit IDE in the Frame control register (Table 25). A valid WUF identifier is defined and stored in the ID registers (Table 17 to Table 20). An ID mask can be defined to allow a group of identifiers to be recognized as valid by an individual node. The identifier mask is defined in the mask registers (Table 21 to Table 24), where a 1 means ‘don’t care’. In the example illustrated in Figure 7, based on the standard frame format, the 11-bit identifier is defined as 0x1A0. The identifier is stored in ID registers 2 and 3 (Table 19 and Table 20). The three least significant bits of the ID mask (bits 2 to 4 of Mask register 2; Table 23) are ‘don’t care’. This means that any of eight different identifiers will be recognized as valid in the received WUF (from 0x1A0 to 0x1A7). UJA1168 SPI Settings 11-bit Identifier field: 0x1A0 stored in ID registers 2 and 3 0 0 1 1 0 1 0 0 0 0 0 ID mask: 0x007 stored in Mask registers 2 and 3 0 0 0 0 0 0 0 0 1 1 1 1 0 1 0 0 x x x Valid Wake-Up Identifiers: 0x1A0 to 0x1A7 0 0 1 015aaa439 Fig 7. Evaluating the ID field in a selective wake-up frame The data field indicates which nodes are to be woken up. Within the data field, groups of nodes can be predefined and associated with bits in a data mask. By comparing the incoming data field with the data mask, multiple groups of nodes can be woken up simultaneously with a single wake-up message. The data length code (bits DLC in the Frame control register; Table 25) determines the number of data bytes (between 0 and 8) expected in the data field of a CAN wake-up frame. If one or more data bytes are expected (DLC  0000), at least one bit in the data field of the received wake-up frame must be set to 1 and at least one equivalent bit in the associated data mask register in the transceiver (see Table 26) must also be set to 1 for a UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 25 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking successful wake-up. Each matching pair of 1s indicates a group of nodes to be activated (since the data field is up to 8 bytes long, up to 64 groups of nodes can be defined). If DLC = 0, a data field is not expected. In the example illustrated in Figure 8, the data field consists of a single byte (DLC = 1). This means that the data field in the incoming wake-up frame is evaluated against data mask 7 (stored at address 6Fh; see Table 26 and Figure 9). Data mask 7 is defined as 10101000 in the example. This means the node is assigned to three groups (Group1, Group 3 and Group 5). The received message shown in Figure 8 could, potentially, wake up four groups of nodes: groups 2, 3, 4 and 5. Two matches are found (groups 3 and 5) when the message data bits are compared with the configured data mask (DM7). DLC stored values received message 0 0 0 Data mask 7 0 0 0 1 1 0 1 0 1 0 0 0 Groups: 1 2 3 4 5 6 7 8 1 0 1 1 1 1 0 0 0 015aaa365 Fig 8. Evaluating the Data field in a selective wake-up frame Optionally, the data length code and the data field can be excluded from the evaluation of the wake-up frame. If bit PNDM = 0, only the identifier field is evaluated to determine if the frame contains a valid wake-up message. If PNDM = 1 (the default value), the data field is included for wake-up filtering. When PNDM = 0, a valid wake-up message is detected and a wake-up event is captured (and CW is set to 1) when: • the identifier field in the received wake-up frame matches the pattern in the ID registers after filtering AND • the CRC field in the received frame (including a recessive CRC delimiter) was received without error When PNDM = 1, a valid wake-up message is detected when: • the identifier field in the received wake-up frame matches the pattern in the ID registers after filtering AND • the frame is not a Remote frame AND • the data length code in the received message matches the configured data length code (bits DLC) AND • if the data length code is greater than 0, at least one bit in the data field of the received frame is set and the corresponding bit in the associated data mask register is also set AND • the CRC field in the received frame (including a recessive CRC delimiter) was received without error UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 26 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking If the UJA1168 receives a CAN message containing errors (e.g. a ‘stuffing’ error) that are transmitted in advance of the ACK field, an internal error counter is incremented. If a CAN message is received without any errors appearing in front of the ACK field, the counter is decremented. Data received after the CRC delimiter and before the next SOF is ignored by the partial networking module. If the counter overflows (counter > 31), a frame detect error is captured (PNFDE = 1) and the device wakes up; the counter is reset to zero when the bias is switched off and partial networking is re-enabled. Partial networking is assumed to be configured correctly when PNCOK is set to 1 by the application software. The UJA1168 clears PNCOK after a write access to any of the CAN partial networking configuration registers (see Section 6.8.2). If selective wake-up is disabled (CPNC = 0) or partial networking is not configured correctly (PNCOK = 0), and the CAN transceiver is in Offline mode with wake-up enabled (CWE = 1), then any valid wake-up pattern (according to ISO 11898-5/-6) will trigger a wake-up event. If the CAN transceiver is not in Offline mode (CMC  00) or CAN wake-up is disabled (CWE = 0), all wake-up patterns on the bus will be ignored. 6.8.1 CAN FD frames CAN FD stands for ‘CAN with Flexible Data-Rate’. It is based on the CAN protocol as specified in ISO 11898-1. It still uses the CAN bus arbitration method. However, it increases the bit-rate by switching to a shorter bit time at the end of the arbitration process and returns to the longer bit time at the CRC Delimiter, before the receivers transmit their acknowledge bits. The effective data-rate is increased by allowing longer data fields. CAN uses four bits for the data length code, allowing for 16 different codes. However, only the first nine values are used to define the data field length (between 0 and 8 bytes; DLC values from of 9 to 15 all indicate an 8-byte data field). In CAN FD, DLC codes 9 to 15 are used to signify longer data fields. CAN FD is being gradually introduced into automotive market. In time, all CAN controllers will be required to comply with the new standard (enabling ‘FD-active’ nodes) or at least to tolerate CAN FD communication (enabling ‘FD-passive’ nodes). The UJA1168TK/FD and UJA1168TK/VX/FD enable FD-passive nodes by means of a dedicated implementation of the partial networking protocol. The UJA1168/FD variants can be configured to recognize CAN FD frames as valid frames. When CFDC = 1, the error counter is decremented every time the control field of a CAN FD frame is received. The UJA1168/FD remains in Sleep mode (CAN FD-passive) with partial networking enabled. CAN FD frames are never recognized as valid wake-up frames, even if PNDM = 0 and the frame contains a valid ID. After receiving the control field of a CAN FD frame, the UJA1168/FD ignores further bus signals until idle is again detected. CAN FD frames are interpreted as frames with errors by the partial networking module in the UJA1168/TK and UJA1168/TK/VX and in the UJA1168/FD variants when CFDC = 0. So the error counter is incremented when a CAN FD frame is received. Bit PNFDE is set to 1 and the device wakes up if the ratio of CAN FD frames to valid CAN frames exceeds the threshold that triggers error counter overflow. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 27 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.8.2 CAN partial networking configuration registers Dedicated registers are provided for configuring CAN partial networking. Table 16. Symbol Access Value 7:3 reserved R - 2:0 CDR R/W Table 17. CAN data rate selection: 000 50 kbit/s 001 100 kbit/s 010 125 kbit/s 011 250 kbit/s 100 reserved (intended for future use; currently selects 500 kbit/s) 101 500 kbit/s 110 reserved (intended for future use; currently selects 500 kbit/s) 111 1000 kbit/s ID register 0 (address 27h) Symbol Access Value Description 7:0 ID07:ID00 R/W - bits ID07 to ID00 of the extended frame format ID register 1 (address 28h) Bit Symbol Access Value Description 7:0 ID15:ID08 R/W - bits ID15 to ID08 of the extended frame format Table 19. ID register 2 (address 29h) Bit Symbol Access Value Description 7:2 ID23:ID18 R/W - bits ID23 to ID18 of the extended frame format bits ID05 to ID00 of the standard frame format 1:0 ID17:ID16 R/W - bits ID17 to ID16 of the extended frame format Table 20. ID register 3 (address 2Ah) Bit Symbol Access Value 7:5 reserved R - 4:0 ID28:ID24 R/W - Table 21. Description bits ID28 to ID24 of the extended frame format bits ID10 to ID06 of the standard frame format Mask register 0 (address 2Bh) Bit Symbol Access Value Description 7:0 M07:M00 R/W - mask bits ID07 to ID00 of the extended frame format Table 22. Product data sheet Description Bit Table 18. UJA1168 Data rate register (address 26h) Bit Mask register 1 (address 2Ch) Bit Symbol Access Value Description 7:0 M15:M08 R/W - mask bits ID15 to ID08 of the extended frame format All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 28 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 23. Bit Symbol Access Value Description 7:2 M23:M18 R/W - mask bits ID23 to ID18 of the extended frame format mask bits ID05 to ID00 of the standard frame format 1:0 M17:M16 R/W - mask bits ID17 to ID16 of the extended frame format Table 24. Bit Access 7:5 reserved R 4:0 M28:M24 R/W Value Description - mask bits ID28 to ID24 of the extended frame format mask. bits ID10 to ID06 of the standard frame format Frame control register (address 2Fh) Bit Symbol Access Value Description 7 IDE R/W - identifier format: 6 Product data sheet Mask register 3 (address 2Eh) Symbol Table 25. UJA1168 Mask register 2 (address 2Dh) PNDM R/W 5:4 reserved R 3:0 DLC R/W 0 standard frame format (11-bit) 1 extended frame format (29-bit) - partial networking data mask: 0 data length code and data field are ‘don’t care’ for wake-up 1 data length code and data field are evaluated at wake-up number of data bytes expected in a CAN frame: 0000 0 0001 1 0010 2 0011 3 0100 4 0101 5 0110 6 0111 7 1000 8 1001 to 1111 tolerated, 8 bytes expected; DM0 ignored Table 26. Data mask registers (addresses 68h to 6Fh) Addr. Bit Symbol Access Value Description 68h 7:0 DM0 R/W - data mask 0 configuration 69h 7:0 DM1 R/W - data mask 1 configuration 6Ah 7:0 DM2 R/W - data mask 2 configuration 6Bh 7:0 DM3 R/W - data mask 3 configuration 6Ch 7:0 DM4 R/W - data mask 4 configuration All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 29 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 26. Data mask registers (addresses 68h to 6Fh) …continued Addr. Bit Symbol Access Value Description 6Dh 7:0 DM5 R/W - data mask 5 configuration 6Eh 7:0 DM6 R/W - data mask 6 configuration 6Fh 7:0 DM7 R/W - data mask 7 configuration DLC > 8 00h DM1 DM2 DM3 DM4 DM5 DM6 DM7 DLC = 8 DM0 DM1 DM2 DM3 DM4 DM5 DM6 DM7 DM1 DM2 DM3 DM4 DM5 DM6 DM7 DM2 DM3 DM4 DM5 DM6 DM7 DM3 DM4 DM5 DM6 DM7 DM4 DM5 DM6 DM7 DM5 DM6 DM7 DM6 DM7 DLC = 7 DLC = 6 DLC = 5 DLC = 4 DLC = 3 DLC = 2 DLC = 1 DM7 015aaa280 Fig 9. UJA1168 Product data sheet Data mask resister usage for different values of DLC All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 30 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.9 CAN fail-safe features 6.9.1 TXD dominant timeout A TXD dominant time-out timer is started when pin TXD is forced LOW while the transceiver is in CAN Active Mode. If the LOW state on pin TXD persists for longer than the TXD dominant time-out time (tto(dom)TXD), the transmitter is disabled, releasing the bus lines to recessive state. This function prevents a hardware and/or software application failure from driving the bus lines to a permanent dominant state (blocking all network communications). The TXD dominant time-out timer is reset when pin TXD goes HIGH. The TXD dominant time-out time also defines the minimum possible bit rate of 15 kbit/s. When the TXD dominant time-out time is exceeded, a CAN failure event is captured (CF = 1; see Table 33), if enabled (CFE = 1; see Table 37). In addition, the status of the TXD dominant timeout can be read via the CFS bit in the Transceiver status register (Table 15) and bit CTS is cleared. 6.9.2 Pull-up on TXD pin Pin TXD has an internal pull-up towards V1 to ensure a safe defined recessive driver state in case the pin is left floating. 6.9.3 V1 undervoltage event A CAN failure event is captured (CF = 1), if enabled, when the supply to the CAN transceiver (V1) falls below 90 % of its nominal value. In addition, status bit VCS is set to 1. 6.9.4 Loss of power at pin BAT A loss of power at pin BAT has no influence on the bus lines or on the microcontroller. No reverse currents will flow from the bus. 6.10 Local wake-up via WAKE pin Local wake-up is enabled via bits WPRE and WPFE in the WAKE pin event capture enable register (see Table 38). A wake-up event is triggered by a LOW-to-HIGH (if WPRE = 1) and/or a HIGH-to-LOW (if WPFE = 1) transition on the WAKE pin. This arrangement allows for maximum flexibility when designing a local wake-up circuit. In applications that don’t make use of the local wake-up facility, local wake-up should be disabled and the WAKE pin connected to GND to ensure optimal EMI performance. Table 27. WAKE status register (address 4Bh) Bit Symbol Access Value 7:2 reserved R - 1 WPVS R 0 reserved R Description WAKE pin status: 0 voltage on WAKE pin below switching threshold (Vth(sw)) 1 voltage on WAKE pin above switching threshold (Vth(sw)) - While the SBC is in Normal mode, the status of the voltage on pin WAKE can always be read via bit WPVS. Otherwise, WPVS is only valid if local wake-up is enabled (WPRE = 1 and/or WPFE = 1). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 31 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.11 Wake-up and interrupt event diagnosis via pin RXD Wake-up and interrupt event diagnosis in the UJA1168 is intended to provide the microcontroller with information on the status of a range of features and functions. This information is stored in the event status registers (Table 31 to Table 33) and is signaled on pin RXD, if enabled. A distinction is made between regular wake-up events and interrupt events (at least one regular wake-up source must be enabled to allow the UJA1168 to switch to Sleep mode; see Section 6.1.1.3). Table 28. Table 29. Regular events Symbol Event Power-on Description CW CAN wake-up disabled WPR rising edge on WAKE disabled pin a rising-edge wake-up was detected on pin WAKE WPF falling edge on WAKE disabled pin a falling-edge wake-up was detected on pin WAKE a CAN wake-up event was detected while the transceiver was in CAN Offline mode. Diagnostic events Symbol Event Power-on Description PO power-on always enabled the UJA1168 has exited Off mode (after battery power has been restored/connected) OTW overtemperature warning disabled the IC temperature has exceeded the overtemperature warning threshold (not in Sleep mode) SPIF SPI failure disabled SPI clock count error (only 16-, 24- and 32-bit commands are valid), illegal WMC, NWP or MC code or attempted write access to locked register (not in Sleep mode) WDF watchdog failure always enabled watchdog overflow in Window or Timeout mode or watchdog triggered too early in Window mode; a system reset is triggered immediately in response to a watchdog failure in Window mode; when the watchdog overflows in Timeout mode, a system reset is only performed if a WDF is already pending (WDF = 1) VEXTO[1] VEXT overvoltage disabled VEXT overvoltage detected VEXTU[1] VEXT undervoltage disabled VEXT undervoltage detected V1U V1 undervoltage disabled voltage on V1 has dropped below the 90 % undervoltage threshold when V1 is active (event is not captured in Sleep mode because V1 is off). V1U event capture is independent of the setting of bits V1RTC. PNFDE PN frame detection error always enabled partial networking frame detection error CBS CAN bus silence disabled no activity on CAN bus for tto(silence) (detected only when CBSE = 1 while bus active) CF CAN failure disabled one of the following CAN failure events detected: - CAN transceiver deactivated due to a V1 undervoltage - CAN transceiver deactivated due to a dominant clamped TXD (not in Sleep mode) [1] UJA1168TK/VX only. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 32 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking PO, WDF and PNFDE interrupts are always captured. Wake-up and interrupt detection can be enabled/disabled for the remaining events individually via the event capture enable registers (Table 35 to Table 37). If an event occurs while the associated event capture function is enabled, the relevant event status bit is set. If the transceiver is in CAN Offline mode with V1 active (SBC Normal or Standby mode), pin RXD is forced LOW to indicate that a wake-up or interrupt event has been detected. If the UJA1168 is in sleep mode when the event occurs, the microcontroller supply, V1, is activated and the SBC switches to Standby mode (via Reset mode). The microcontroller can monitor events via the event status registers. An extra status register, the Global event status register (Table 30), is provided to help speed up software polling routines. By polling the Global event status register, the microcontroller can quickly determine the type of event captured (system, supply, transceiver or WAKE pin) and then query the relevant table (Table 31, Table 32, Table 33 or Table 34 respectively). After the event source has been identified, the status flag should be cleared (set to 0) by writing 1 to the relevant bit (writing 0 will have no effect). A number of status bits can be cleared in a single write operation by writing 1 to all relevant bits. It is strongly recommended to clear only the status bits that were set to 1 when the status registers were last read. This precaution ensures that events triggered just before the write access are not lost. 6.11.1 Interrupt/wake-up delay If interrupt or wake-up events occur very frequently while the transceiver is in CAN Offline mode, they can have a significant impact on the software processing time (because pin RXD is repeatedly driven LOW, requiring a response from the microcontroller each time an interrupt/wake-up is generated). The UJA1168 incorporates an event delay timer to limit the disturbance to the software. When one of the event capture status bits is cleared, pin RXD is released (HIGH) and a timer is started. If further events occur while the timer is running, the relevant status bits are set. If one or more events are pending when the timer expires after td(event), pin RXD goes LOW again to alert the microcontroller. In this way, the microcontroller is interrupted once to process a number of events rather than several times to process individual events. If all events are cleared while the timer is running, RXD remains HIGH after the timer expires, since there are no pending events. The event capture registers can be read at any time. The event capture delay timer is stopped immediately when pin RSTN goes low (triggered by a HIGH-to-LOW transition on the pin). RSTN is driven LOW when the SBC enters Reset, Sleep, Overtemp and Off modes. A pending event is signaled on pin RXD when the SBC enters Sleep mode. 6.11.2 Sleep mode protection The wake-up event capture function is critical when the UJA1168 is in Sleep mode, because the SBC will only leave Sleep mode in response to a captured wake-up event. To avoid potential system deadlocks, the SBC distinguishes between regular and diagnostic UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 33 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking events (see Section 6.11). Wake-up events (via the CAN bus or the WAKE pin) are classified as regular events; diagnostic events signal failure/error conditions or state changes. At least one regular wake-up event must be enabled before the UJA1168 can switch to Sleep mode. Any attempt to enter Sleep mode while all regular wake-up events are disabled will trigger a system reset. Another condition that must be satisfied before the UJA1168 can switch to Sleep mode is that all event status bits must be cleared. If an event is pending when the SBC receives a Sleep mode command (MC = 001), it will immediately switch to Reset mode. This condition applies to both regular and diagnostic events. Sleep mode can be permanently disabled in applications where, for safety reasons, the supply voltage to the host controller must never be cut off. Sleep mode is permanently disabled by setting the Sleep control bit (SLPC) in the SBC configuration register (see Table 8) to 1. This register is located in the non-volatile memory area of the device. When SLPC = 1, a Sleep mode SPI command (MC = 001) will trigger an SPI failure event instead of a transition to Sleep mode. 6.11.3 Event status and event capture registers After an event source has been identified, the status flag should be cleared (set to 0) by writing 1 to the relevant status bit (writing 0 will have no effect). Table 30. Bit Symbol Access Value 7:4 reserved R - 3 WPE R 0 no pending WAKE pin event 1 WAKE pin event pending at address 0x64 no pending transceiver event TRXE R 0 1 transceiver event pending at address 0x63 1 SUPE R 0 no pending supply event 1 supply event pending at address 0x62 0 no pending system event 1 system event pending at address 0x61 SYSE Table 31. R System event status register (address 61h) Bit Symbol Access Value 7:5 reserved R - 4 PO R/W 0 no recent power-on 1 the UJA1168 has left Off mode after power-on Description 3 reserved R - 2 OTW R/W 0 overtemperature not detected 1 the global chip temperature has exceeded the overtemperature warning threshold (Tth(warn)otp) 0 no SPI failure detected 1 SPI failure detected 0 no watchdog failure event captured 1 watchdog failure event captured 1 0 Product data sheet Description 2 0 UJA1168 Global event status register (address 60h) SPIF WDF R/W R/W All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 34 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 32. Bit Symbol Access Value 7:3 reserved R - 2 VEXTO[1] R/W 0 no VEXT overvoltage event captured 1 VEXT overvoltage event captured 0 no VEXT undervoltage event captured 1 VEXT undervoltage event captured 0 no V1 undervoltage event captured 1 V1 undervoltage event captured 1 0 [1] VEXTU[1] V1U Bit R/W Transceiver event status register (address 63h) Symbol Access Value 7:6 reserved R - 5 PNFDE R/W 0 no partial networking frame detection error detected 1 partial networking frame detection error detected Description 4 CBS R/W 0 CAN bus active 1 no activity on CAN bus for tto(silence) 3:2 reserved R - 1 CF R/W 0 no CAN failure detected 1 CAN transceiver deactivated due to V1 undervoltage OR dominant clamped TXD 0 no CAN wake-up event detected 1 CAN wake-up event detected while the transceiver is in CAN Offline Mode 0 CW Table 34. R/W WAKE pin event capture status register (address 64h) Bit Symbol Access Value 7:2 reserved R - 1 WPR R/W 0 no rising edge detected on WAKE pin 1 rising edge detected on WAKE pin 0 WPF R/W 0 no falling edge detected on WAKE pin 1 falling edge detected on WAKE pin Table 35. Product data sheet R/W Description UJA1168TK/VX only; reserved in the UJA1168TK. Table 33. UJA1168 Supply event status register (address 62h) Description System event capture enable register (address 04h) Bit Symbol Access Value 7:3 reserved R - 2 OTWE R/W Description overtemperature warning event capture: 0 overtemperature warning disabled 1 overtemperature warning enabled All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 35 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 35. System event capture enable register (address 04h) Bit Symbol Access 1 SPIFE R/W 0 reserved Table 36. R Value SPI failure detection: 0 SPI failure detection disabled 1 SPI failure detection enabled - Supply event capture enable register (address 1Ch) Bit Symbol Access Value 7:3 reserved R - 2 VEXTOE[1] R/W 1 0 [1] VEXTUE[1] V1UE R/W 0 VEXT undervoltage detection disabled 1 VEXT undervoltage detection enabled R/W V1 undervoltage detection: 0 V1 undervoltage detection disabled 1 V1 undervoltage detection enabled Transceiver event capture enable register (address 23h) Bit Symbol Access Value 7:5 reserved R - 4 CBSE R/W 3:2 reserved R 1 CFE R/W CWE Table 38. Description CAN bus silence detection: 0 CAN bus silence detection disabled 1 CAN bus silence detection enabled CAN failure detection 1 Product data sheet VEXT overvoltage detection enabled VEXT undervoltage detection: 0 UJA1168 VEXT overvoltage detection disabled UJA1168TK/VX only; reserved in the UJA1168TK. Table 37. 0 Description VEXT overvoltage detection: 0 1 Description R/W CAN failure detection disabled CAN failure detection enabled CAN wake-up detection: 0 CAN wake-up detection disabled 1 CAN wake-up detection enabled WAKE pin event capture enable register (address 4Ch) Bit Symbol Access Value 7:2 reserved R - 1 WPRE R/W Description rising-edge detection on WAKE pin: 0 rising-edge detection on WAKE pin disabled 1 rising-edge detection on WAKE pin enabled All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 36 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 38. WAKE pin event capture enable register (address 4Ch) …continued Bit Symbol Access 0 WPFE R/W Value Description falling-edge detection on WAKE pin: 0 falling-edge detection on WAKE pin disabled 1 falling-edge detection on WAKE pin enabled 6.12 Non-volatile SBC configuration The UJA1168 contains Multiple Time Programmable Non-Volatile (MTPNV) memory cells that allow some of the default device settings to be reconfigured. The MTPNV memory address range is from 0x73 to 0x74. An overview of the MTPNV registers is given in Table 39. Table 39. Overview of MTPNV registers Address Register Name Bit: 7 6 5 4 3 2 0x73 Start-up control (see Table 11) reserved RLC VEXTSUC reserved 0x74 SBC configuration control (see Table 8) reserved V1RTSUC FNMC SDMC 1 0 reserved SLPC 6.12.1 Programming MTPNV cells The UJA1168 must be in Forced Normal mode and the MTPNV cells must contain the factory preset values before the non-volatile memory can be reprogrammed. The UJA1168 will switch to Forced Normal mode after a reset event (e.g. pin RSTN LOW) when the MTPNV cells contain the factory preset values (since FNMC = 1). The factory presets may need to be restored before reprogramming can begin (see Section 6.12.2). When the factory presets have been restored, a system reset is generated automatically and UJA1168 switches to Forced Normal mode. This ensures that the programming cycle cannot be interrupted by the watchdog. Programming of the non-volatile memory registers is performed in two steps. First, the required values are written to addresses 0x73 and 0x74. In the second step, reprogramming is confirmed by writing the correct CRC value to the MTPNV CRC control register (see Section 6.12.1.1). The SBC starts reprogramming the MTPNV cells as soon as the CRC value has been validated. If the CRC value is not correct, reprogramming is aborted. On completion, a system reset is generated to indicate that the MTPNV cells have been reprogrammed successfully. Note that the MTPNV cells cannot be read while they are being reprogrammed. After an MTPNV programming cycle has been completed, the non-volatile memory is protected from being overwritten via a standard SPI write operation. The MTPNV cells can be reprogrammed a maximum of 200 times (Ncy(W)MTP; see Table 58). Bit NVMPS in the MTPNV status register (Table 40) indicates whether the non-volatile cells can be reprogrammed. This register also contains a write counter, WRCNTS, that is incremented each time the MTPNV cells are reprogrammed (up to a maximum value of 111111; there is no overflow). Note that this counter is provided for UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 37 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking information purposes only; reprogramming will not be aborted if it reaches its maximum value. An error correction code status bit, ECCS, indicates whether reprogramming was successful. Table 40. Bit Symbol Access Value Description 7:2 WRCNTS R xxxxxx write counter: contains the number of times the MTPNV cells were reprogrammed 1 ECCS R 0 no error detected during MTPNV cell programming 1 an error was detected during MTPNV cell programming 0 MTPNV memory cannot be overwritten 1[1] MTPNV memory is ready to be reprogrammed 0 [1] 6.12.1.1 MTPNV status register (address 70h) NVMPS R Factory preset value. Calculating the CRC value for MTP programming The cyclic redundancy check value stored in bits CRCC in the MTPNV CRC control register is calculated using the data written to registers 0x73 and 0x74. Table 41. MTPNV CRC control register (address 75h) Bit Symbol Access Value Description 7:0 CRCC R/W - CRC control data The CRC value is calculated using the data representation shown in Figure 10 and the modulo-2 division with the generator polynomial: X8 + X5 + X3 + X2 + X + 1. The result of this operation must be bitwise inverted. 7 6 1 0 7 register 0x73 6 1 register 0x74 0 015aaa382 Fig 10. Data representation for CRC calculation The following parameters can be used to calculate the CRC value (e.g. via the Autosar method): Table 42. Parameters for CRC coding Parameter Value CRC result width 8 bits Polynomial 0x2F Initial value 0xFF Input data reflected no Result data reflected no XOR value 0xFF Alternatively, the following algorithm can be used: data = 0 // unsigned byte crc = 0xFF UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 38 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking for i = 0 to 1 data = content_of_address(0x73 + i) EXOR crc for j = 0 to 7 if data  128 data = data * 2 // shift left by 1 data = data EXOR 0x2F else data = data * 2 // shift left by 1 next j crc = data next i crc = crc EXOR 0xFF 6.12.2 Restoring factory preset values Factory preset values are restored if the following conditions apply for at least td(MTPNV) during power-up: • pin RSTN is held LOW • CANH is pulled up to VBAT • CANL is pulled down to GND After the factory preset values have been restored, the SBC performs a system reset and enters Forced normal Mode. Since the CAN bus is clamped dominant, pin RXDC is forced LOW. During the factory preset restore process, this pin is forced HIGH; a falling edge on this pin caused by bit PO being set after power-on then clearly indicates that the process has been completed. Note that the write counter, WRCNTS, in the MTPNV status register is incremented every time the factory presets are restored. 6.13 Device ID A byte is reserved at address 0x7E for a UJA1168 identification code. Table 43. Identification register (address 7Eh) Bit Symbol Access 7:0 IDS[7:0] R Value Description device identification code F8h UJA1168TK FCh UJA1168TK/FD E8h UJA1168TK/VX ECh UJA1168TK/VX/FD 6.14 Lock control register Sections of the register address area can be write-protected to protect against unintended modifications. Note that this facility only protects locked bits from being modified via the SPI and will not prevent the UJA1168 updating status registers etc. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 39 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 44. Lock control register (address 0Ah) Bit Symbol Access Value Description 7 reserved R cleared for future use 6 LK6C R/W 5 4 LK5C LK4C - lock control 6: address area 0x68 to 0x6F 0 SPI write-access enabled 1 SPI write-access disabled R/W lock control 5: address area 0x50 to 0x5F 0 SPI write-access enabled 1 SPI write-access disabled R/W lock control 4: address area 0x40 to 0x4F - WAKE pin control 0 1 3 2 1 0 LK3C LK2C LK1C LK0C R/W SPI write-access enabled SPI write-access disabled lock control 3: address area 0x30 to 0x3F 0 SPI write-access enabled 1 SPI write-access disabled R/W lock control 2: address area 0x20 to 0x2F - transceiver control 0 SPI write-access enabled 1 SPI write-access disabled R/W lock control 1: address area 0x10 to 0x1F - regulator control 0 SPI write-access enabled 1 SPI write-access disabled R/W lock control 0: address area 0x06 to 0x09 - general purpose memory 0 SPI write-access enabled 1 SPI write-access disabled 6.15 General purpose memory UJA1168 allocates 4 bytes of RAM as general purpose registers for storing user information. The general purpose registers can be accessed via the SPI at address 0x06 to 0x09 (see Table 45). 6.16 SPI 6.16.1 Introduction The Serial Peripheral Interface (SPI) provides the communication link with the microcontroller, supporting multi-slave operations. The SPI is configured for full duplex data transfer, so status information is returned when new control data is shifted in. The interface also offers a read-only access option, allowing registers to be read back by the application without changing the register content. The SPI uses four interface signals for synchronization and data transfer: • SCSN: SPI chip select; active LOW • SCK: SPI clock; default level is LOW due to low-power concept (pull-down) • SDI: SPI data input UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 40 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking • SDO: SPI data output; floating when pin SCSN is HIGH Bit sampling is performed on the falling edge of the clock and data is shifted in/out on the rising edge, as illustrated in Figure 11. SCSN SCK 02 01 03 04 N–1 N sampled SDI SDO X floating X MSB MSB–1 MSB–2 MSB–3 01 LSB MSB MSB–1 MSB–2 MSB–3 01 LSB X floating 015aaa255 Fig 11. SPI timing protocol The SPI data in the UJA1168 is stored in a number of dedicated 8-bit registers. Each register is assigned a unique 7-bit address. Two bytes must be transmitted to the SBC for a single register write operation. The first byte contains the 7-bit address along with a ‘read-only’ bit (the LSB). The read-only bit must be 0 to indicate a write operation (if this bit is 1, a read operation is assumed and any data on the SDI pin is ignored). The second byte contains the data to be written to the register. 24- and 32-bit read and write operations are also supported. The register address is automatically incremented, once for a 24-bit operation and twice for a 32-bit operation, as illustrated in Figure 12. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 41 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Register Address Range 0x00 0x01 0x02 0x03 0x04 ID=0x05 addr 0000101 A6 A5 A4 A3 A2 Address Bits A1 A0 0x05 0x06 data data data byte 1 0x07 0x7D 0x7E 0x7F data data byte 2 data byte 3 RO x x x Read-only Bit x x x x x x x x Data Bits x x x x x x x Data Bits x x x Data Bits x x x 015aaa289 Fig 12. SPI data structure for a write operation (16-, 24- or 32-bit) During an SPI data read or write operation, the contents of the addressed register(s) is returned via pin SDO. The UJA1168 tolerates attempts to write to registers that don't exist. If the available address space is exceeded during a write operation, the data above the valid address range is ignored (without generating an SPI failure event). During a write operation, the UJA1168 monitors the number of SPI bits transmitted. If the number recorded is not 16, 24 or 32, then the write operation is aborted and an SPI failure event is captured (SPIF = 1). If more than 32 bits are clocked in on pin SDI during a read operation, the data stream on SDI is reflected on SDO from bit 33 onwards. After the UJA1168 exits Reset mode (positive edge on RSTN), an SPI read/write access must not be attempted for at least tto(SPI). Any earlier access may be ignored (without generating an SPI failure event). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 42 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 6.16.2 Register map The addressable register space contains 128 registers with addresses from 0x00 to 0x7F. An overview of the register mapping is provided in Table 45 to Table 54. The functionality of individual bits is discussed in more detail in relevant sections of the data sheet. Table 45. Overview of primary control registers Address Register Name Bit: 7 6 0x00 Watchdog control WMC 0x01 Mode control reserved 5 3 2 1 0 OTWE SPIFE reserved FNMS SDMS WDS LK3C LK2C LK1C reserved NWP MC 0x03 Main status reserved OTWS 0x04 System event enable reserved 0x05 Watchdog status reserved 0x06 Memory 0 GPM[7:0] 0x07 Memory 1 GPM[15:8] 0x08 Memory 2 GPM[23:16] 0x09 Memory 3 GPM[31:24] 0x0A Lock control reserved LK6C Table 46. Overview of V1 and INH/VEXT control registers Address Register Name 4 NMS LK5C RSS LK4C LK0C Bit: 7 6 5 4 3 2 0 0x10 V1 and INH/VEXT control reserved 0x1B Supply status reserved VEXTS 0x1C Supply event enable reserved VEXTOE VEXTUE V1UE Table 47. Overview of transceiver control and partial networking registers Address Register Name VEXTC 1 7 6 5 PNCOK 0x20 CAN control reserved 0x22 Transceiver status CTS CPNERR CPNS 0x23 Transceiver event enable reserved 0x26 Data rate reserved 0x27 Identifier 0 ID[7:0] 0x28 Identifier 1 ID[15:8] 0x29 Identifier 2 ID[23:16] 0x2A Identifier 3 reserved 0x2B Mask 0 M[7:0] 0x2C Mask 1 M[15:8] 0x2D Mask 2 M[23:16] 0x2E Mask 3 reserved 0x2F Frame control IDE 0x68 Data mask 0 DM0[7:0] 0x69 Data mask 1 DM1[7:0] Product data sheet V1S Bit: CFDC[1] UJA1168 V1RTC 4 3 CPNC reserved COSCS CBSS CBSE 2 1 0 reserved VCS CFS CFE CWE CMC reserved CDR ID[28:24] M[28:24] PNDM reserved All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 DLC © NXP Semiconductors N.V. 2014. All rights reserved. 43 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 47. Overview of transceiver control and partial networking registers …continued Address Register Name Bit: 7 6 0x6A Data mask 2 DM2[7:0] 0x6B Data mask 3 DM3[7:0] 0x6C Data mask 4 DM4[7:0] 0x6D Data mask 5 DM5[7:0] 0x6E Data mask 6 DM6[7:0] 0x6F Data mask 7 DM7[7:0] [1] 5 4 3 2 1 0 UJA1168TK/FD and UJA1168TK/VX/FD only; otherwise reserved. Table 48. Overview of WAKE pin control and status registers Address Register Name Bit: 1 0 0x4B WAKE pin status reserved WPVS reserved 0x4C WAKE pin enable reserved WPRE WPFE 7 6 Table 49. Overview of event capture registers Address Register Name 6 0x60 Global event status reserved 0x61 System event status reserved 0x62 Supply event status reserved 0x63 Transceiver event status reserved 0x64 WAKE pin event status reserved Table 50. Overview of MTPNV status register Register Name Table 51. Address MTPNV status Table 52. Address 2 4 3 2 1 0 WPE TRXE SUPE SYSE SPIF WDF PO reserved OTW CBS reserved VEXTO PNFDE 5 4 3 2 WRCNTS VEXTU V1U CF CW WPR WPF 1 0 ECCS NVMPS Overview of Startup control register Register Name Bit: Startup control 6 5 reserved 4 RLC 3 2 1 0 VEXTSUC reserved Overview of SBC configuration control register Register Name Bit: 7 0x74 5 6 7 0x73 3 Bit: 7 0x70 4 Bit: 7 Address 5 6 SBC configuration control reserved UJA1168 Product data sheet 5 4 V1RTSUC 3 2 1 FNMC SDMC reserved SLPC All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 0 © NXP Semiconductors N.V. 2014. All rights reserved. 44 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 53. Address Overview of CRC control register Register Name Bit: 7 0x75 Table 54. Address MTPNV CRC control 6 4 3 2 1 0 5 4 3 2 1 0 CRCC[7:0] Overview of Identification register Register Name Bit: 7 0x7E 5 Identification 6 IDS[7:0] 6.16.3 Register configuration in UJA1168 operating modes A number of register bits may change state automatically when the UJA1168 switches from one operating mode to another. This is particularly evident when the UJA1168 switches to Off mode. These changes are summarized in Table 55. If an SPI transmission is in progress when the UJA1168 changes state, the transmission is ignored (automatic state changes have priority). Table 55. Register bit settings in UJA1168 operating modes Symbol Off (power-on default) Standby Normal Sleep Overtemp Reset CBS 0 no change no change no change no change no change CBSE 0 no change no change no change no change no change CBSS 1 actual state actual state no change actual state actual state CDR 101 no change no change no change no change no change CF 0 no change no change no change no change no change CFDC 0 no change no change no change no change no change CFE 0 no change no change no change no change no change CFS 0 actual state actual state actual state actual state actual state CMC 00 no change no change no change no change no change COSCS 0 actual state actual state actual state actual state actual state CPNC 0 no change no change no change no change no change CPNERR 1 actual state actual state actual state actual state actual state CPNS 0 actual state actual state actual state actual state actual state CRCC 00000000 no change no change no change no change no change CTS 0 0 actual state 0 0 0 CW 0 no change no change no change no change no change CWE 0 no change no change no change no change no change DMn 0 no change no change no change no change no change DLC 0000 no change no change no change no change no change ECCS actual state actual state actual state actual state actual state actual state FNMC MTPNV MTPNV MTPNV MTPNV MTPNV MTPNV FNMS 0 actual state actual state actual state actual state actual state GPMn 00000000 no change no change no change no change no change IDn 00000000 no change no change no change no change no change IDE 0 no change no change no change no change no change UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 45 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 55. Register bit settings in UJA1168 operating modes …continued Symbol Off (power-on default) IDS Standby Normal Sleep Overtemp Reset 1111 1000 (TK) no change 1110 1000 (TKVX) no change no change no change no change LKnC 0 no change no change no change no change no change MC 100 100 111 001 don’t care 100 NMS 1 no change 0 no change no change no change NVMPS actual state actual state actual state actual state actual state actual state NWP 0100 no change no change no change 0100 0100 OTW 0 no change no change no change no change no change OTWE 0 no change no change no change no change no change OTWS 0 actual state actual state actual state actual state actual state PNCOK 0 no change no change no change no change no change PNDM 1 no change no change no change no change no change PNFDE 0 no change no change no change no change no change PO 1 no change no change no change no change no change RLC MTPNV MTPNV MTPNV MTPNV MTPNV MTPNV RSS 00000 no change no change no change 10010 reset source SDMC MTPNV MTPNV MTPNV MTPNV MTPNV MTPNV SDMS 0 actual state actual state actual state actual state actual state SLPC MTPNV MTPNV MTPNV MTPNV MTPNV MTPNV SPIF 0 no change no change no change no change no change SPIFE 0 no change no change no change no change no change SUPE 0 no change no change no change no change no change SYSE 1 no change no change no change no change no change TRXE 0 no change no change no change no change no change V1RTC defined by V1RTSUC no change no change no change no change no change V1RTSUC MTPNV MTPNV MTPNV MTPNV MTPNV MTPNV V1S 0 actual state actual state actual state actual state actual state V1UE 0 no change no change no change no change no change V1U 0 no change no change no change no change no change VCS 0 actual state actual state actual state actual state actual state VEXTC defined by VEXTSUC no change no change no change no change no change VEXTO[1] 0 no change no change no change no change no change VEXTOE[1] 0 no change no change no change no change no change VEXTS[1] 00 actual state actual state actual state actual state actual state VEXTSUC MTPNV MTPNV MTPNV MTPNV MTPNV MTPNV VEXTU[1] 0 no change no change no change no change no change VEXTUE[1] 0 no change no change no change no change no change WDF 0 no change no change no change no change no change WDS 0 actual state actual state actual state actual state actual state UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 46 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 55. Register bit settings in UJA1168 operating modes …continued Symbol Off (power-on default) Standby Normal Sleep Overtemp Reset WMC [2] no change no change no change no change [2] WPE 0 no change no change no change no change no change WPF 0 no change no change no change no change no change WPR 0 no change no change no change no change no change WPFE 0 no change no change no change no change no change WPRE 0 no change no change no change no change no change WPVS 0 no change no change no change no change no change WRCNTS actual state actual state actual state actual state actual state actual state [1] UJA1168TK/VX only. [2] 001 if SDMC = 1; otherwise 010. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 47 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 7. Limiting values Table 56. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Vx voltage on pin x DC value voltage between pin CANH and pin CANL Vtrt transient voltage Max Unit V 0.2 +6 pins TXD, RXD, SDI, SDO, SCK, SCSN, RSTN 0.2 VV1 + 0.2 V pins INH/VEXT/WAKE 18 +40 V pin BAT 0.2 +40 V pins CANH and CANL with respect to any other pin 58 +58 V 40 +40 V 150 +100 V 6 +6 kV 8 +8 kV 4 +4 kV 2 +2 kV 100 +100 V 750 +750 V 500 +500 V 40 +150 C 55 +150 C [1] pin V1 V(CANH-CANL) Min [2] on pins CANL, CANH, WAKE, VEXT; pin BAT via reverse polarity diode and capacitor to ground VESD electrostatic discharge voltage IEC 61000-4-2 [3] on pins CANH and CANL; pin BAT with capacitor; pin WAKE with 10 nF capacitor and 10 k resistor; pin VEXT with 2.2 F capacitor [4] HBM on pins CANH, CANL [5] on pins BAT, WAKE, VEXT on any other pin [6] MM on any pin [7] CDM on corner pins on any other pin Tvj virtual junction temperature Tstg storage temperature [8] [1] When the device is not powered up, IV1 (max) = 25 mA. [2] Verified by an external test house to ensure pins can withstand ISO 7637 part 2 automotive transient test pulses 1, 2a, 3a and 3b. [3] ESD performance according to IEC 61000-4-2 (150 pF, 330 ) has been verified by an external test house; the result was equal to or better than 6 kV. [4] Human Body Model (HBM): according to AEC-Q100-002 (100 pF, 1.5 k). [5] V1 and BAT connected to GND, emulating the application circuit. [6] Machine Model (MM): according to AEC-Q100-003 (200 pF, 0.75 H, 10 ). [7] Charged Device Model (CDM): according to AEC-Q100-011 (field Induced charge; 4 pF). [8] In accordance with IEC 60747-1. An alternative definition of virtual junction temperature is: Tvj = Tamb + P  Rth(j-a), where Rth(j-a) is a fixed value used in the calculation of Tvj. The rating for Tvj limits the allowable combinations of power dissipation (P) and ambient temperature (Tamb). UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 48 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 8. Thermal characteristics Table 57. Symbol Rth(vj-a) [1] Thermal characteristics Parameter Conditions [1] thermal resistance from virtual junction to ambient HVSON14 Typ Unit 60 K/W According to JEDEC JESD51-2, JESD51-5 and JESD51-7 at natural convection on 2s2p board. Board with two inner copper layers (thickness: 35 m) and thermal via array under the exposed pad connected to the first inner copper layer (thickness: 70 m). 9. Static characteristics Table 58. Static characteristics Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supply; pin BAT Vth(det)pon power-on detection threshold voltage VBAT rising 4.2 - 4.55 V Vth(det)poff power-off detection threshold voltage VBAT falling 2.8 - 3 V Vuvr(CAN) CAN undervoltage recovery voltage VBAT rising 4.5 - 5 V Vuvd(CAN) CAN undervoltage detection voltage VBAT falling 4.2 - 4.55 V IBAT battery supply current Sleep mode; MC = 001; 40 C < Tvj < 85 C; CAN Offline mode; CWE = 1; VBAT = 7 V to 18 V - 41 59 A Standby mode; MC = 100; CWE = 1; CAN Offline mode; IV1 = 0 A; VBAT = 7 V to 18 V; 40 C < Tvj < 85 C - 60 85 A additional current in CAN Offline Bias mode; 40 C < Tvj < 85 C - 46 63 A additional current when partial networking enabled; bus active; CPNC = 1; PNCOK = 1 300 400 A additional current from WAKE input; WPRE = WPFE = 1; 40 C < Tvj < 85 C 2 3 A UJA1168 Product data sheet Normal mode; MC = 111; CAN Active mode; CAN recessive; VTXD = VV1 - 4 7.5 mA Normal mode; MC = 111; CAN Active mode; CAN dominant; VTXD = 0 V - 46 67 mA All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 49 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 58. Static characteristics …continued Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit VBAT = 5.5 V to 18 V; IV1 = 120 mA to 0 mA; VTXD = VV1 4.9 5 5.1 V VBAT = 5.65 V to 18 V; IV1 = 150 mA to 0 mA; VTXD = VV1 4.9 5 5.1 V VBAT = 5.65 V to 18 V; IV1 = 100 mA to 0 mA; VTXD = 0 V; VCANH = 0 V 4.9 5 5.1 V - - 100 mV 10 mV - 5  Voltage source: pin V1 VO Vret(RAM) output voltage RAM retention voltage difference between VBAT and VV1 VBAT = 2 V to 3 V; IV1 = 2 mA VBAT = 2 V to 3 V; IV1 = 200 A [1] R(BAT-V1) resistance between pin BAT and pin V1 VBAT = 4 V to 6 V; IV1 = 120 mA VBAT = 3 V to 4 V; IV1 = 40 mA - 2.625 -  Vuvd undervoltage detection voltage Vuvd(nom) = 90 % 4.5 - 4.75 V Vuvd(nom) = 80 % 4 - 4.25 V Vuvd(nom) = 70 % 3.5 3.75 V Vuvd(nom) = 60 % - 3 - 3.25 V Vuvr undervoltage recovery voltage 4.5 - 4.75 V IO(sc) short-circuit output current 300 - 150 mA 4.9 5 5.1 V Voltage source: VEXT (UJA1168TK/VX and UJA1168TK/VX/FD only) VO output voltage VBAT = 6.5 V to 18 V; IVEXT = 30 mA to 0 mA Vuvd undervoltage detection voltage 4.5 - 4.75 V Vovd overvoltage detection voltage 6.5 - 7 V IO(sc) short-circuit output current 125 - 30 mA Voltage source: INH (UJA1168TK and UJA1168TK/FD only) VO output voltage IINH = 180 A VBAT  0.8 - VBAT V Rpd pull-down resistance Sleep mode 3 4 5 M Serial peripheral interface inputs; pins SDI, SCK and SCSN Vth(sw) switching threshold voltage 0.25VV1 - 0.75VV1 V Rpd(SCK) pull-down resistance on pin SCK 40 60 80 k Rpu(SCSN) pull-up resistance on pin SCSN 40 60 80 k ILI(SDI) input leakage current on pin SDI 5 - +5 A Serial peripheral interface data output; pin SDO VOH HIGH-level output voltage IOH = 4 mA VV1  0.4 - - V VOL LOW-level output voltage IOL = 4 mA - 0.4 V UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 - © NXP Semiconductors N.V. 2014. All rights reserved. 50 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 58. Static characteristics …continued Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit ILO(off) off-state output leakage current VSCSN = VV1; VO = 0 V to VV1 5 - +5 A CAN transmit data input; pin TXD Vth(sw) switching threshold voltage 0.25VV1 - 0.75VV1 V Rpu pull-up resistance 40 60 80 k CAN receive data output; pin RXD VOH HIGH-level output voltage IOH = 4 mA VV1  0.4 - - V VOL LOW-level output voltage IOL = 4 mA - - 0.4 V Rpu pull-up resistance CAN Offline mode 40 60 80 k Local wake input; pin WAKE Vth(sw)r rising switching threshold voltage 2.8 - 4.1 V Vth(sw)f falling switching threshold voltage 2.4 - 3.75 V Vhys(i) input hysteresis voltage 250 - 800 mV Ii input current - - 1.5 A pin CANH 2.75 3.5 4.5 V pin CANL 0.5 1.5 2.25 V 400 - +400 mV 0.9VV1 - 1.1VV1 V CAN Active mode (dominant); VTXD = 0 V; VV1 = 4.75 V to 5.5 V; R(CANH-CANL) = 45  to 65  1.5 - 3.0 V CAN Active mode (recessive); CAN Listen-only mode; CAN Offline mode; VTXD = VV1; R(CANH-CANL) = no load 50 - +50 mV CAN Active mode; VTXD = VV1 R(CANH-CANL) = no load 2 0.5VV1 3 V CAN Offline mode; R(CANH-CANL) = no load 0.1 - +0.1 V CAN Offline Bias/Listen-only modes; R(CANH-CANL) = no load; VV1 = 0 V 2 2.5 3 V pin CANH; VCANH = 0 V 50 - - mA pin CANL; VCANL = 5 V - - 52 mA 3 - +3 mA Tvj = 40 C to +85 C High-speed CAN bus lines; pins CANH and CANL VO(dom) dominant output voltage CAN Active mode; VTXD = 0 V Vdom(TX)sym transmitter dominant voltage symmetry Vdom(TX)sym = VV1  VCANH  VCANL; VV1 = 5 V VTXsym transmitter voltage symmetry VTXsym = VCANH + VCANL; fTXD = 250 kHz; CSPLIT = 4.7 nF VO(dif)bus VO(rec) IO(dom) IO(rec) bus differential output voltage recessive output voltage dominant output current recessive output current UJA1168 Product data sheet [1] [2] CAN Active mode; VTXD = 0 V; VV1 = 5 V VCANL = VCANH = 27 V to +32 V; VTXD = VV1 All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 51 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 58. Static characteristics …continued Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Vth(RX)dif differential receiver threshold voltage CAN Active/Listen-only modes; VCANL = VCANH = 12 V to +12 V 0.5 0.7 0.9 V CAN Offline mode; VCANL = VCANH = 12 V to +12 V 0.4 0.7 1.15 V CAN Active/Listen-only modes; VCANL = VCANH = 12 V to +12 V 50 200 400 mV Vhys(RX)dif differential receiver hysteresis voltage Ri(cm) common-mode input resistance 9 15 28 k Ri input resistance deviation 1 - +1 % Ri(dif) differential input resistance 19 30 52 k Ci(cm) common-mode input capacitance [1] - - 20 pF Ci(dif) differential input capacitance [1] - - 10 pF ILI input leakage current 5 - +5 A VCANL = VCANH = 12 V to +12 V VBAT = VV1 = 0 V or VBAT = VV1 = shorted to ground via 47 k; VCANH = VCANL = 5 V Temperature protection Tth(act)otp overtemperature protection activation threshold temperature 167 177 187 C Tth(rel)otp overtemperature protection release threshold temperature 127 137 147 C Tth(warn)otp overtemperature protection warning threshold temperature 127 137 147 C 0 - 0.2VV1 V Reset output; pin RSTN VOL LOW-level output voltage VV1 = 1.0 V to 5.5 V; pull-up resistor to VV1  900  Rpu pull-up resistance 40 60 80 k Vth(sw) switching threshold voltage 0.25VV1 - 0.75VV1 V - - 200 - MTP non-volatile memory Ncy(W)MTP number of MTP write cycles [1] Not tested in production; guaranteed by design. [2] The test circuit used to measure the bus output voltage symmetry (which includes CSPLIT) is shown in Figure 19. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 52 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 10. Dynamic characteristics Table 59. Dynamic characteristics Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit from VBAT exceeding the power-on detection threshold until VV1 exceeds the 90 % undervoltage threshold; CV1 = 4.7 F - 2.8 4.7 ms 6 - 54 s Voltage source; pin V1 tstartup start-up time td(uvd) undervoltage detection delay time td(uvd-RSTNL) delay time from undervoltage detection to RSTN LOW undervoltage on V1 - - 63 s td(buswake-VOH) delay time from bus wake-up to HIGH-level output voltage HIGH = 0.8VO(V1); IV1  100 mA - - 5 ms Voltage source; pin VEXT td(uvd) undervoltage detection delay time 6 - 39 s td(ovd) overvoltage detection delay time 6 - 39 s Serial peripheral interface timing; pins SCSN, SCK, SDI and SDO tcy(clk) clock cycle time 250 - - ns tSPILEAD SPI enable lead time 50 - - ns tSPILAG SPI enable lag time 50 - - ns tclk(H) clock HIGH time 125 - - ns tclk(L) clock LOW time 125 - - ns tsu(D) data input set-up time 50 - - ns th(D) data input hold time 50 - - ns tv(Q) data output valid time pin SDO; CL = 20 pF - - 50 ns tWH(S) chip select pulse width HIGH pin SCSN 250 - - ns tto(SPI) SPI time-out time after leaving Reset mode - - 40 s - - 255 ns - - 350 ns CAN transceiver timing; pins CANH, CANL, TXD and RXD td(TXD-RXD) delay time from TXD to RXD RL = 60 ; CL = 100 pF; 50 % VTXD to 50 % VRXD; CRXD = 15 pF; fTXD = 250 kHz RL = 120 ; CL = 200 pF; 50 % VTXD to 50 % VRXD; CRXD = 15 pF; fTXD = 250 kHz [1] td(TXD-busdom) delay time from TXD to bus dominant - 80 - ns td(TXD-busrec) delay time from TXD to bus recessive - 80 - ns td(busdom-RXD) delay time from bus dominant to RXD - 105 - ns UJA1168 Product data sheet CRXD = 15 pF All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 53 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 59. Dynamic characteristics …continued Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit td(busrec-RXD) delay time from bus recessive to RXD CRXD = 15 pF - 120 - ns tbit(RXD) bit time on pin RXD tbit(TXD) = 500 ns 400 - 550 ns twake(busdom) bus dominant wake-up time first pulse (after first recessive) for wake-up on pins CANH and CANL; CAN Offline mode 0.5 - 3.0 s second pulse for wake-up on pins CANH and CANL 0.5 - 3.0 s first pulse for wake-up on pins CANH and CANL; CAN Offline mode 0.5 - 3.0 s second pulse (after first dominant) for wake-up on pins CANH and CANL 0.5 - 3.0 s twake(busrec) bus recessive wake-up time [2] tto(wake) wake-up time-out time between first and second dominant pulses; CAN Offline mode 570 - 1200 s tto(dom)TXD TXD dominant time-out time CAN Active mode; VTXD = 0 V 2.7 - 3.3 ms tto(silence) bus silence time-out time recessive time measurement started in all CAN modes; RL = 120  0.95 - 1.17 s td(busact-bias) delay time from bus active to bias - - 200 s tstartup(CAN) CAN start-up time - - 220 s when switching to Active mode (CTS = 1) Pin RXD: event capture timing (valid in CAN Offline mode only) td(event) event capture delay time CAN Offline mode 0.9 - 1.1 ms tblank blanking time when switching from Offline to Active/Listen-only mode - - 25 s ttrig(wd)1 watchdog trigger time 1 Normal mode; watchdog Window mode only [3] 0.45  NWP[4] 0.55  ms NWP[4] ttrig(wd)2 watchdog trigger time 2 Normal/Standby mode [5] 0.9  NWP[4] 1.11  ms NWP[4] RLC = 00 20 - 25 ms RLC = 01 10 - 12.5 ms RLC = 10 3.6 - 5 ms RLC = 11 1 - 1.5 ms 18 - - s Watchdog Pin RSTN: reset pulse width tw(rst) reset pulse width output pulse width input pulse width UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 54 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking Table 59. Dynamic characteristics …continued Tvj = 40 C to +150 C; VBAT = 3 V to 28 V; R(CANH-CANL) = 60 ; all voltages are defined with respect to ground; positive currents flow into the IC; typical values are given at VBAT = 13 V; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit 50 - - s 0.9 - 1.1 ms Pin WAKE twake wake-up time MTP non-volatile memory td(MTPNV) MTPNV delay time before factory presets are restored [1] Guaranteed by design. [2] See Figure 14. [3] A system reset will be performed if the watchdog is in Window mode and is triggered less than ttrig(wd)1 after the start of the watchdog period (or in the first half of the watchdog period). [4] The nominal watchdog period is programmed via the NWP control bits. [5] The watchdog will be reset if it is in window mode and is triggered at least ttrig(wd)1, but not more than ttrig(wd)2, after the start of the watchdog period (or in the second half of the watchdog period). A system reset will be performed if the watchdog is triggered more than ttrig(wd)2 after the start of the watchdog period (watchdog overflows). +,*+ 7;' /2: &$1+ &$1/ GRPLQDQW 9 92GLIEXV 9 UHFHVVLYH +,*+ 5;' /2: WG7;'EXVGRP WG7;'EXVUHF WGEXVGRP5;' WG7;'5;' WGEXVUHF5;' WG7;'5;' DDD Fig 13. CAN transceiver timing diagram UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 55 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking  7;'   [WELW7;' WELW7;'  5;'  WELW5;' DDD Fig 14. Loop delay symmetry timing diagram 6&61 W63,/($' W63,/$* WF\FON WFON+ WFON/ WVX' WK' W:+6 6&. 6', 06% ; /6% ; WY4 IORDWLQJ 6'2 IORDWLQJ ; 06% /6% DDD Fig 15. SPI timing diagram UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 56 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 11. Application information 11.1 Application diagram e.g. off-board sensor supply (1) BAT (1) 22 μF BAT 7 10 10 kΩ WAKE V1 VEXT 3 5 RSTN 9 10 nF 14 6 UJA1168TK/VX UJA1168TK/VX/FD 8 11 GND RSTN 4 2 13 12 CANH RT (2) 1 VCC MICROCONTROLLER SCSN SDO standard μC ports SCK SDI RXD TXD RXD TXD VSS CANL RT (2) e.g. 4.7 nF 015aaa366 (1) Actual capacitance value must be a least 1.76 F with 5 V DC offset (recommended capacitor value is 4.7 F) (2) For bus line end nodes, RT = 60  in order to support the ‘split termination concept’. For sub-nodes, an optional ‘weak’ termination of e.g. RT = 1.3 k can be used, if required by the OEM. Fig 16. Typical application using the UJA1168TK/VX or UJA1168TK/VX/FD UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 57 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking e.g. INH as control signal for voltage regulator 3V BAT 22 μF 3V INH (1) BAT 7 10 10 kΩ INH V1 3 5 WAKE RSTN RSTN 9 10 nF 14 6 UJA1168TK UJA1168TK/FD 8 11 GND 2 4 13 12 CANH RT (2) 1 VCC MICROCONTROLLER SCSN SDO standard μC ports SCK SDI RXD TXD RXD TXD VSS CANL RT (2) e.g. 4.7 nF 015aaa368 (1) Actual capacitance value must be a least 1.76 F with 5 V DC offset (recommended capacitor value is 4.7 F) (2) For bus line end nodes, RT = 60  in order to support the ‘split termination concept’. For sub-nodes, an optional ‘weak’ termination of e.g. RT = 1.3 k can be used, if required by the OEM. Fig 17. Typical application using the UJA1168TK or UJA1168TK/FD 11.2 Application hints Further information on the application of the UJA1168 can be found in the NXP application hints document AH1306 Application Hints - Mini high speed CAN system basis chips UJA1163 / UJA1164 / UJA1167 / UJA1168. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 58 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 12. Test information BAT RXD CANH SBC 15 pF TXD RL 100 pF CANL GND 015aaa369 Fig 18. Timing test circuit for CAN transceiver   %$7 7;' &$1+  ȍ I N+] &63/,7 Q) 6%&  &$1/ 5;'  *1'  ȍ DDD Fig 19. Test circuit for measuring transceiver driver symmetry 12.1 Quality information This product has been qualified in accordance with the Automotive Electronics Council (AEC) standard Q100 Rev-G - Failure mechanism based stress test qualification for integrated circuits, and is suitable for use in automotive applications. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 59 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 13. Package outline +9621SODVWLFWKHUPDOHQKDQFHGYHU\WKLQVPDOORXWOLQHSDFNDJHQROHDGV WHUPLQDOVERG\[[PP 627 ; % ' $ $ ( $ F WHUPLQDO LQGH[DUHD GHWDLO; H WHUPLQDO LQGH[DUHD H Y Z E   & & $ % & \ & \ / N (K   'K   'LPHQVLRQV 8QLW PP PP VFDOH $ $ E F PD[    QRP     PLQ    ' 'K ( (K H H               N / Y        Z \   \  VRW 5HIHUHQFHV 2XWOLQH YHUVLRQ ,(& -('(& -(,7$ 627  02  (XURSHDQ SURMHFWLRQ ,VVXHGDWH   Fig 20. Package outline SOT1086-2 (HVSON14) UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 60 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 14. Handling information All input and output pins are protected against ElectroStatic Discharge (ESD) under normal handling. When handling ensure that the appropriate precautions are taken as described in JESD625-A or equivalent standards. 15. Soldering of SMD packages This text provides a very brief insight into a complex technology. A more in-depth account of soldering ICs can be found in Application Note AN10365 “Surface mount reflow soldering description”. 15.1 Introduction to soldering Soldering is one of the most common methods through which packages are attached to Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both the mechanical and the electrical connection. There is no single soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not suitable for fine pitch SMDs. Reflow soldering is ideal for the small pitches and high densities that come with increased miniaturization. 15.2 Wave and reflow soldering Wave soldering is a joining technology in which the joints are made by solder coming from a standing wave of liquid solder. The wave soldering process is suitable for the following: • Through-hole components • Leaded or leadless SMDs, which are glued to the surface of the printed circuit board Not all SMDs can be wave soldered. Packages with solder balls, and some leadless packages which have solder lands underneath the body, cannot be wave soldered. Also, leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered, due to an increased probability of bridging. The reflow soldering process involves applying solder paste to a board, followed by component placement and exposure to a temperature profile. Leaded packages, packages with solder balls, and leadless packages are all reflow solderable. Key characteristics in both wave and reflow soldering are: • • • • • • Board specifications, including the board finish, solder masks and vias Package footprints, including solder thieves and orientation The moisture sensitivity level of the packages Package placement Inspection and repair Lead-free soldering versus SnPb soldering 15.3 Wave soldering Key characteristics in wave soldering are: UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 61 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking • Process issues, such as application of adhesive and flux, clinching of leads, board transport, the solder wave parameters, and the time during which components are exposed to the wave • Solder bath specifications, including temperature and impurities 15.4 Reflow soldering Key characteristics in reflow soldering are: • Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to higher minimum peak temperatures (see Figure 21) than a SnPb process, thus reducing the process window • Solder paste printing issues including smearing, release, and adjusting the process window for a mix of large and small components on one board • Reflow temperature profile; this profile includes preheat, reflow (in which the board is heated to the peak temperature) and cooling down. It is imperative that the peak temperature is high enough for the solder to make reliable solder joints (a solder paste characteristic). In addition, the peak temperature must be low enough that the packages and/or boards are not damaged. The peak temperature of the package depends on package thickness and volume and is classified in accordance with Table 60 and 61 Table 60. SnPb eutectic process (from J-STD-020D) Package thickness (mm) Package reflow temperature (C) Volume (mm3) < 350  350 < 2.5 235 220  2.5 220 220 Table 61. Lead-free process (from J-STD-020D) Package thickness (mm) Package reflow temperature (C) Volume (mm3) < 350 350 to 2000 > 2000 < 1.6 260 260 260 1.6 to 2.5 260 250 245 > 2.5 250 245 245 Moisture sensitivity precautions, as indicated on the packing, must be respected at all times. Studies have shown that small packages reach higher temperatures during reflow soldering, see Figure 21. UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 62 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking maximum peak temperature = MSL limit, damage level temperature minimum peak temperature = minimum soldering temperature peak temperature time 001aac844 MSL: Moisture Sensitivity Level Fig 21. Temperature profiles for large and small components For further information on temperature profiles, refer to Application Note AN10365 “Surface mount reflow soldering description”. 16. Soldering of HVSON packages Section 15 contains a brief introduction to the techniques most commonly used to solder Surface Mounted Devices (SMD). A more detailed discussion on soldering HVSON leadless package ICs can be found in the following application notes: • AN10365 ‘Surface mount reflow soldering description” • AN10366 “HVQFN application information” UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 63 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 17. Revision history Table 62. Revision history Document ID Release date Data sheet status Change notice Supersedes UJA1168 v.2 20140411 Product data sheet - UJA1168 v.1 Modifications: • • • • • • • • • • • • • • • • • • • • UJA1168 v.1 UJA1168 Product data sheet Section 1: text revised (3rd paragraph added) Section 2.1: feature added (loop delay symmetry) Table 2: table note amended Section 6.1.1.4: last paragraph added Section 6.1.1.6: text revised (3rd paragraph) Section 6.1.1.7: text revised (4th paragraph) Table 3: row CAN revised Section 6.2.2: text revised Section 6.3.1: text revised Section 6.3.2: text revised Section 6.7: text and state diagram revised Table 14: description for bits CMC revised Table 15: description for bit CTS revised Table 16: bit reference corrected Section 6.11.3: note added at beginning of section Section 6.16.1: text revised (4th last paragraph); last paragraph added Table 59: symbols and parameters revised for pins V1 and VEXT; parameters tto(SPI) and tbit(RXD) added; additional measurement for parameter td(TXD-RXD); parameter tfltr(rst) renamed to tw(rst) and value changed; parameter values changed: twake for pin WAKE Figure 14: added Section 11.2: added Section 12.1: text updated 20130805 Product data sheet - All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 - © NXP Semiconductors N.V. 2014. All rights reserved. 64 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 18. Legal information 18.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term ‘short data sheet’ is explained in section “Definitions”. [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 18.2 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet. 18.3 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. UJA1168 Product data sheet Suitability for use in automotive applications — This NXP Semiconductors product has been qualified for use in automotive applications. Unless otherwise agreed in writing, the product is not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale — NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 65 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. 18.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 19. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 66 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 20. Contents 1 2 2.1 2.2 2.3 2.4 2.5 2.6 3 4 5 5.1 5.2 6 6.1 6.1.1 6.1.1.1 6.1.1.2 6.1.1.3 6.1.1.4 6.1.1.5 6.1.1.6 6.1.1.7 6.1.1.8 6.1.2 6.2 6.2.1 6.2.2 6.2.3 6.2.4 6.3 6.3.1 6.3.2 6.3.3 6.4 6.5 6.5.1 6.5.2 6.6 6.7 6.7.1 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Designed for automotive applications. . . . . . . . 1 Low-drop voltage regulator for 5 V microcontroller supply (V1) . . . . . . . . . . . . . . . . 2 Power Management . . . . . . . . . . . . . . . . . . . . . 2 System control and diagnostic features . . . . . . 2 Sensor supply voltage (pin VEXT of UJA1168TK/VX and UJA1168TK/VX/FD). . . . . 3 Ordering information . . . . . . . . . . . . . . . . . . . . . 3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pinning information . . . . . . . . . . . . . . . . . . . . . . 5 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 Functional description . . . . . . . . . . . . . . . . . . . 6 System controller . . . . . . . . . . . . . . . . . . . . . . . 6 Operating modes . . . . . . . . . . . . . . . . . . . . . . . 6 Normal mode . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Standby mode. . . . . . . . . . . . . . . . . . . . . . . . . . 6 Sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Reset mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Off mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Overtemp mode . . . . . . . . . . . . . . . . . . . . . . . . 9 Forced Normal mode . . . . . . . . . . . . . . . . . . . . 9 Hardware characterization for the UJA1168 operating modes . . . . . . . . . . . . . . . . . . . . . . . 10 System control registers . . . . . . . . . . . . . . . . . 10 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Software Development mode . . . . . . . . . . . . . 14 Watchdog behavior in Window mode . . . . . . . 14 Watchdog behavior in Timeout mode . . . . . . . 14 Watchdog behavior in Autonomous mode . . . 15 System reset. . . . . . . . . . . . . . . . . . . . . . . . . . 15 Characteristics of pin RSTN . . . . . . . . . . . . . . 15 Selecting the reset pulse width . . . . . . . . . . . . 16 Reset sources. . . . . . . . . . . . . . . . . . . . . . . . . 16 Global temperature protection . . . . . . . . . . . . 17 Power supplies . . . . . . . . . . . . . . . . . . . . . . . . 17 Battery supply voltage (VBAT) . . . . . . . . . . . . . 17 Low-drop voltage supply for 5 V microcontroller (V1) . . . . . . . . . . . . . . . . . . . . 17 High voltage output (UJA1168TK, UJA1168TK/FD) and external sensor supply (UJA1168TK/VX, UJA1168TK/VX/FD) . . . . . . 18 High-speed CAN transceiver . . . . . . . . . . . . . 19 CAN operating modes . . . . . . . . . . . . . . . . . . 19 6.7.1.1 6.7.1.2 6.7.1.3 6.7.1.4 6.7.2 CAN Active mode. . . . . . . . . . . . . . . . . . . . . . CAN Listen-only mode . . . . . . . . . . . . . . . . . . CAN Offline and Offline Bias modes . . . . . . . CAN Off mode . . . . . . . . . . . . . . . . . . . . . . . . CAN standard wake-up (partial networking not enabled) . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7.3 CAN control and Transceiver status registers 6.8 CAN partial networking . . . . . . . . . . . . . . . . . 6.8.1 CAN FD frames . . . . . . . . . . . . . . . . . . . . . . . 6.8.2 CAN partial networking configuration registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9 CAN fail-safe features . . . . . . . . . . . . . . . . . . 6.9.1 TXD dominant timeout . . . . . . . . . . . . . . . . . . 6.9.2 Pull-up on TXD pin. . . . . . . . . . . . . . . . . . . . . 6.9.3 V1 undervoltage event . . . . . . . . . . . . . . . . . . 6.9.4 Loss of power at pin BAT . . . . . . . . . . . . . . . . 6.10 Local wake-up via WAKE pin . . . . . . . . . . . . . 6.11 Wake-up and interrupt event diagnosis via pin RXD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.11.1 Interrupt/wake-up delay . . . . . . . . . . . . . . . . . 6.11.2 Sleep mode protection . . . . . . . . . . . . . . . . . . 6.11.3 Event status and event capture registers. . . . 6.12 Non-volatile SBC configuration . . . . . . . . . . . 6.12.1 Programming MTPNV cells . . . . . . . . . . . . . . 6.12.1.1 Calculating the CRC value for MTP programming . . . . . . . . . . . . . . . . . . . . . . . . . 6.12.2 Restoring factory preset values . . . . . . . . . . . 6.13 Device ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.14 Lock control register. . . . . . . . . . . . . . . . . . . . 6.15 General purpose memory . . . . . . . . . . . . . . . 6.16 SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.2 Register map . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.3 Register configuration in UJA1168 operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 8 Thermal characteristics . . . . . . . . . . . . . . . . . 9 Static characteristics . . . . . . . . . . . . . . . . . . . 10 Dynamic characteristics. . . . . . . . . . . . . . . . . 11 Application information . . . . . . . . . . . . . . . . . 11.1 Application diagram . . . . . . . . . . . . . . . . . . . . 11.2 Application hints . . . . . . . . . . . . . . . . . . . . . . . 12 Test information . . . . . . . . . . . . . . . . . . . . . . . 12.1 Quality information . . . . . . . . . . . . . . . . . . . . . 13 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 14 Handling information . . . . . . . . . . . . . . . . . . . 19 20 20 21 22 23 25 27 28 31 31 31 31 31 31 32 33 33 34 37 37 38 39 39 39 40 40 40 43 45 48 49 49 53 57 57 58 59 59 60 61 continued >> UJA1168 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 2 — 16 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 67 of 68 UJA1168 NXP Semiconductors Mini high-speed CAN system basis chip for partial networking 15 15.1 15.2 15.3 15.4 16 17 18 18.1 18.2 18.3 18.4 19 20 Soldering of SMD packages . . . . . . . . . . . . . . Introduction to soldering . . . . . . . . . . . . . . . . . Wave and reflow soldering . . . . . . . . . . . . . . . Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . Soldering of HVSON packages. . . . . . . . . . . . Revision history . . . . . . . . . . . . . . . . . . . . . . . . Legal information. . . . . . . . . . . . . . . . . . . . . . . Data sheet status . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . Contact information. . . . . . . . . . . . . . . . . . . . . Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 61 61 61 62 63 64 65 65 65 65 66 66 67 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP Semiconductors N.V. 2014. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 16 April 2014 Document identifier: UJA1168