CY8C9520A_10

CY8C9520A CY8C9540A, CY8C9560A 20, 40, and 60 Bit I/O Expander with EEPROM Features ■ ■ Overview The CY8C95xxA is a multi-port I/O expander with on board user available EEPROM and several PWM outputs. All devices in this family operate identically but differ in I/O pins, number of PWMs, and internal EEPROM size. The CY8C95xxA operates as two I2C slave devices. The first device is a multi port I/O expander (single I2C address to access all ports through registers). The second device is a serial EEPROM. Dedicated configuration registers can be used to disable the EEPROM. The EEPROM uses 2-byte addressing to support the 28 Kbyte EEPROM address space. The selected device is defined by the most significant bits of the I2C address or by specific register addressing. The I/O expander's data pins can be independently assigned as inputs, outputs, quasi-bidirectional input/outputs or PWM ouputs. The individual data pins can be configured as open drain or collector, strong drive (10 mA source, 25 mA sink), resistively pulled up or down, or high impedance. The factory default configuration is pulled up internally. The system master writes to the I/O configuration registers through the I2C bus. Configuration and output register settings are storable as user defaults in a dedicated section of the EEPROM. If user defaults were stored in EEPROM, they are restored to the ports at power up. While this device can share the bus with SMBus devices, it can only communicate with I2C masters. The I2C slave in this device requires that the I2C master supports clock stretching. There is one dedicated pin that is configured as an interrupt output (INT) and can be connected to the interrupt logic of the system master. This signal can inform the system master that there is incoming data on its ports or that the PWM output state was changed. The EEPROM is byte readable and supports byte-by-byte writing. A pin can be configured as an EEPROM Write Disable (WD) input that blocks write operations when set high. The configuration registers can also disable EEPROM operations. The CY8C95xxA has one fixed address pin (A0) and up to six additional pins (A1-A6), which allow up to 128 devices to share a common two wire I2C data bus. The Extendable Soft Addressing algorithm provides the option to choose the number of pins needed to assign the desired address. Pins not used for address bits are available as GPIO pins. There are 4 (CY8C9520A), 8 (CY8C9540A), or 16 (CY8C9560A) independently configurable 8-bit PWMs. These PWMs are listed as PWM0-PWM15. Each PWM can be clocked by one of six available clock sources. For details on how to configure I2C, see Application Note "Communication - I2C Port Expander with Flash Storage AN2304" at http://www.cypress.com. I C interface logic electrically compatible with SMBus Up to 20 (CY8C9520A), 40 (CY8C9540A), or 60 (CY8C9560A) I/O data pins independently configurable as inputs, outputs, Bi-directional input/outputs, or PWM outputs 4/8/16 PWM sources with 8-bit resolution Extendable soft addressing algorithm allowing flexible I2C address configuration Internal 3-/11-/27-Kbyte EEPROM User default storage, I/O port settings in internal EEPROM Optional EEPROM write disable (WD) input Interrupt output indicates input pin level changes and pulse width modulator (PWM) state changes Internal power on reset (POR) Internal configurable watchdog timer 2 ■ ■ ■ ■ ■ ■ ■ ■ Top Level Block Diagram WD EEPROM User Settings Area User Available Area Clocks 32 kHz 24 MHz 1.5 MHz GPort 1 GPort 0 8 Bit IO 93.75 kHz Divider (1-255) GPort 2 5 Bit IO 3 Bit IO or A4-A6 4 Bit IO or A1-A3, WD6 PWM 0 Control Unit GPort 3 8 Bit IO PWM 15 GPort 7 8 Bit IO SCL SDA V dd V ss Power-on-Reset INT A0 Cypress Semiconductor Corporation Document Number: 38-12036 Rev. *E • 198 Champion Court • San Jose, CA 95134-1709 •408-943-2600 Revised December 14, 2010 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Contents Architecture .............................................................3 Applications ........................................................3 Device Access Addressing ....................................4 Serial EEPROM Device ......................................4 Multi Port I/O Device ...........................................4 Document Conventions ..........................................4 Acronyms ............................................................4 Units of Measure ................................................4 Numeric Naming .................................................4 Pinouts .....................................................................5 28-Pin Part Pinout ..............................................5 48-Pin Part Pinout ..............................................6 100-Pin Part Pinout ............................................7 Pin Descriptions ......................................................9 Extendable Soft Addressing ...............................9 Interrupt Pin (INT) ...............................................9 Write Disable Pin (WD) .......................................9 External Reset Pin (XRES) .................................9 Working with PWMs ...........................................9 Register Mapping Table ........................................11 Register Descriptions ...........................................11 Input Port Registers (00h - 07h) .......................11 Output Port Registers (08h - 0Fh) ....................11 Int. Status Port Registers (10h - 17h) ...............12 Port Select Register (18h) ................................12 Interrupt Mask Port Register (19h) ...................12 Select PWM Register (1Ah) ..............................12 Inversion Register (1Bh) ...................................12 Port Direction Register (1Ch) ...........................12 Drive Mode Registers (1Dh-23h) ......................12 PWM Select Register (28h) ..............................12 Config (29h) ......................................................13 Period Register (2Ah) .......................................13 Pulse Width Register (2Bh) ..............................13 Divider Register (2Ch) ......................................13 Enable Register (2Dh) ......................................13 Device ID/Status Register (2Eh) .......................13 Watchdog Register (2Fh) .................................14 Command Register (30h) .................................14 Commands Description ........................................14 Store Config to E2 POR Defaults Cmd (01h) ...14 Restore Factory Defaults Cmd (02h) ................14 Write E2 POR Defaults Cmd (03h) ...................14 Read E2 POR Defaults Cmd (04h) ...................15 Write Device Config Cmd (05h) ........................15 Read Device Config Cmd (06h) ........................15 Reconfigure Device Cmd (07h) ........................15 Electrical Specifications .......................................16 Absolute Maximum Ratings ..............................16 Operating Temperature ....................................16 DC Electrical Characteristics ............................17 AC Electrical Characteristics ............................19 Packaging Dimensions .........................................21 Thermal Impedances ........................................23 Solder Reflow Peak Temperature ....................23 Features and Ordering Information .....................24 Ordering Code Definitions ................................24 Acronyms ...............................................................25 Reference Documents ..........................................25 Document Conventions ........................................25 Units of Measure ..............................................25 Numeric Conventions .......................................25 Glossary .................................................................26 Document History Page ........................................31 Sales, Solutions, and Legal Information .............32 Worldwide Sales and Design Support ..............32 Products ...........................................................32 PSoC Solutions ................................................32 Document Number: 38-12036 Rev. *E Page 2 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Architecture The Top Level Block Diagram on page 1 illustrates the device block diagram. The main blocks include the control unit, PWMs, EEPROM, and I/O ports. The control unit executes commands received from the I2C bus and transfers data between other bus devices and the master device. The on chip EEPROM can be separated conventionally into two regions. The first region is designed to store data and is available for byte wide read/writes through the I2C bus. It is possible to prevent write operations by setting the WD pin to high. All EEPROM operations can be blocked by configuration register settings. The second region allows the user to store the port and PWM default settings using special commands. These defaults are automatically reloaded and processed after device power on. The number of I/O lines and PWM sources are listed in the following table. Table 1. GPIO Availability Port GPort 0 GPort 1 GPort 2 GPort 3 GPort 4 GPort 5 GPort 6 GPort 7 PWMs CY8C9520A 8 bit 5-8 bit[1] 0-4 bit[1] – – – – – 4 CY8C9540A 8 bit 5-8bit[1] 0-4it[1] 8 bit 8 bit 4 bit – – 8 CY8C9560A 8 bit 5-8 bit[1] 0-4 bit[1] 8 bit 8 bit 8 bit 8 bit 8 bit 16 Figure 1. Logical Structure of the I/O Port GPortx 7 Drive Mode Registers Output Register DriveMode Pull-Up Data DriveMode High Z PWMs Select PWM Interrupt Status Input Register Interrupt Mask 8 Bit IO Pin Direction Inversion There are four pins on GPort 2 and three on GPort 1 that can be used as general purpose I/O or EEPROM Write Disable (WD) and I2C-address input (A1-A6), depending on configuration settings. Figure 1 shows the single port logical structure. The Port Drive Mode register gives the option to select one of seven available modes for each pin separately: pulled up/down, open drain high/low, strong drive fast/slow, or high impedance. By default these configuration registers store values setting I/O pins to be pulled up. The Invert register enables inversion of the logic of the Input registers separately for each pin. The Select PWM register assigns pins as PWM outputs. All of these configuration registers are read/writable using corresponding commands in the multi-port device. The Port Input and Output registers are separated. When the Output register is written, the data is sent to the external pins. When the Input register is read, the external pin logic levels are captured and transferred. As a result, the read data can be different from written Output register data. This enables implementation of a quasi-bidirectional input-output mode, when the corresponding binary digit is configured as pulled up/down output. Each port has an Interrupt Mask register and an Interrupt Status register. Each high bit in the Interrupt Status register signals that there has been a change in the corresponding input line since the last read of that Interrupt Status register. The Interrupt Status register is cleared after each read. The Interrupt Mask register enables/disables activation of the INT line when input levels are changed. Each high in the Interrupt Mask register masks (disables) an interrupt generated from the corresponding input line. Applications Each GPIO pin can be used to monitor and control various board level devices, including LEDs and system intrusion detection devices. The on board EEPROM can be used to store information such as error codes or board manufacturing data for read-back by application software for diagnostic purposes. Note 1. This port contains configuration-dependant GPIO lines or A1-A6 and WD lines. Document Number: 38-12036 Rev. *E Page 3 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Device Access Addressing Following a start condition, the I2C master device sends a byte to address an I2C slave. This address accesses the device in the CY8C95xx. By default there are two possible address formats in binary representation: 010000A0X and 101000A0X. The first is used to access the multi port device and the second to access the EEPROM. If additional address lines (A1-A6) are used then the Device Addressing. Table 2 defines the device addresses. This addressing method uses a technique called Extendable Soft Addressing, described in the section Extendable Soft Addressing on page 9. Table 2. Device Addressing Multi-Port Device 01 0 0 0 0 0 A6 1 1 1 1 A5 A5 0 0 0 0 0 0 0 0 0 A2 0 A1 A1 A1 A1 A1 A1 A0 A0 A0 A0 A0 A0 A0 R/W R/W R/W R/W R/W R/W R/W 1 1 1 1 1 1 0 0 0 0 0 A5 space is reached, then further writes are responded to with a NAK. Refer to Figure 6 on page 10, which illustrates memory reading and writing procedures for the EEPROM device. Multi Port I/O Device This device allows the user to set configurations and I/O operations through internal registers. Each data transfer is preceded by the command byte. This byte is used as a pointer to a register that receives or transmits data. Available registers are listed in Table 7 on page 11. Document Conventions EEPROM Device 1 1 1 1 A4 A4 A4 0 0 0 A3 A3 A3 A3 0 0 A2 A2 A2 A2 A2 0 A1 A1 A1 A1 A1 A1 A0 R/W A0 R/W A0 R/W A0 R/W A0 R/W A0 R/W A0 R/W Acronyms Table 3 lists the acronyms that are used in this document. Table 3. Acronyms Acronym AC DC EEPROM direct current electrically erasable programmable read-only memory (E2) general purpose I/O input/output most-significant bit power on reset pulse width modulator Description alternating current A3 A2 A4 A3 A2 A4 A3 A2 A4 A3 A2 A6 A5 When all address lines A1-A6 are used, the device being accessed is defined by the first byte following the address in the write transaction. If the most significant bit (MSb) of this byte is ‘0’, this byte is treated as a command (register address) byte of the multi-port device. If the MSb is ‘1’, this byte is the first of a 2-byte EEPROM address. In this case, the device masks the MSb to determine the EEPROM address. GPIO I/O MSb POR PWM Serial EEPROM Device EEPROM reading and writing operations require 2 bytes, AHI and ALO, which indicate the memory address to use. To read one or more bytes, the master device addresses the unit with a write cycle (= 0) to send AHI followed by ALO, readdresses the unit with a read cycle (= 1), and reads one or more data bytes. Each data byte read increments the internal address counter by one up to the end of the EEPROM address space. A read or write beyond the end of the EEPROM address space must result in a NAK response by the Port Expander. To write data to the EEPROM, the master device performs one write cycle, with the first two bytes being AHI followed by ALO. This is followed by one or more data bytes. In the case of block writing it is advisable to set the starting address on the beginning of the 64-byte boundary, for example 01C0h or 0080h, but this is not mandatory. When a 64-byte boundary is crossed in the EEPROM, the I2C clock is stretched while the device performs an EEPROM write sequence. If the end of available EEPROM Units of Measure A units of measure table is located in the Electrical Specifications section. Table 17 on page 16 lists all the abbreviations used in Section 4. Numeric Naming Hexidecimal numbers are represented with all letters in uppercase with an appended lowercase ‘h’ (for example, ‘14h’ or ‘3Ah’). Hexidecimal numbers may also be represented by a ‘0x’ prefix, the C coding convention. Binary numbers have an appended lowercase ‘b’ (for example, ‘01010100b’ or ‘01000011b’). Numbers not indicated by an ‘h’, ‘b’, or ‘0x’ are decimal. Document Number: 38-12036 Rev. *E Page 4 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Pinouts The CY8C95xxA device is available in a variety of packages, which are listed and illustrated in the following tables. 28-Pin Part Pinout Table 4. 28-Pin Part Pinout (SSOP) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name GPort0_Bit0_PWM3 GPort0_Bit1_PWM1 GPort0_Bit2_PWM3 GPort0_Bit3_PWM1 GPort0_Bit4_PWM3 GPort0_Bit5_PWM1 GPort0_Bit6_PWM3 GPort0_Bit7_PWM1 VSS I2C Serial Clock (SCL) I2C Serial Data (SDA) GPort2_Bit3_PWM3/A1 A0 VSS GPort2_Bit2_PWM0/WD INT GPort2_Bit1_PWM0/A2 GPort2_Bit0_PWM2/A3 XRES GPort1_Bit7_PWM0/A4 GPort1_Bit6_PWM2/A5 GPort1_Bit5_PWM0/A6 GPort1_Bit4_PWM2 GPort1_Bit3_PWM0 GPort1_Bit2_PWM2 GPort1_Bit1_PWM0 GPort1_Bit0_PWM2 Vdd Description Port 0, Bit 0, PWM 3. Port 0, Bit 1, PWM 1. Port 0, Bit 2, PWM 3. Port 0, Bit 3, PWM 1. Port 0, Bit 4, PWM 3. Port 0, Bit 5, PWM 1. Port 0, Bit 6, PWM 3. Port 0, Bit 7, PWM 1. Ground connection. I2C Clock. I2C Data. Port 2, Bit 3, PWM 3, Address 1. Address 0. Ground connection. Port 2, Bit 2, PWM 0, E2 Write Disable. Port 2, Bit 1, PWM 0, Address 2. Port 2, Bit 0, PWM 2, Address 3. Active high external reset with internal pull down. Port 1, Bit 7, PWM 0, Address 4. Port 1, Bit 6, PWM 2, Address 5. Port 1, Bit 5, PWM 0, Address 6. Port 1, Bit 4, PWM 2. Port 1, Bit 3, PWM 0. Port 1, Bit 2, PWM 2. Port 1, Bit 1, PWM 0. Port 1, Bit 0, PWM 2. Supply voltage. Figure 2. CY8C9520A 28-Pin Device GPort0_Bit0_PWM3 GPort0_Bit1_PWM1 GPort0_Bit2_PWM3 GPort0_Bit3_PWM1 GPort0_Bit4_PWM3 GPort0_Bit5_PWM1 GPort0_Bit6_PWM3 GPort0_Bit7_PWM1 Vss I2C Serial Clock (SCL) I2C Serial Data (SDA) GPort2_Bit3_PWM3/A1 A0 Vss 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SSOP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Vdd GPort1_Bit0_PWM2 GPort1_Bit1_PWM0 GPort1_Bit2_PWM2 GPort1_Bit3_PWM0 GPort1_Bit4_PWM2 GPort1_Bit5_PWM0/A6 GPort1_Bit6_PWM2/A5 GPort1_Bit7_PWM0/A4 XRES GPort2_Bit0_PWM2/A3 GPort2_Bit1_PWM0/A2 INT GPort2_Bit2_PWM0/WD Document Number: 38-12036 Rev. *E Page 5 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A 48-Pin Part Pinout Table 5. 48-Pin Part Pinout (SSOP) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name GPort0_Bit0_PWM7 GPort0_Bit1_PWM5 GPort0_Bit2_PWM3 GPort0_Bit3_PWM1 GPort0_Bit4_PWM7 GPort0_Bit5_PWM5 GPort0_Bit6_PWM3 GPort0_Bit7_PWM1 GPort3_Bit0_PWM7 GPort3_Bit1_PWM5 GPort3_Bit2_PWM3 GPort3_Bit3_PWM1 VSS GPort3_Bit4_PWM7 GPort3_Bit5_PWM5 GPort3_Bit6_PWM3 GPort3_Bit7_PWM1 GPort5_Bit2_PWM3 GPort5_Bit3_PWM1 I2C Serial Clock (SCL) I2C Serial Data (SDA) GPort2_Bit3_PWM3/A1 A0 VSS GPort2_Bit2_PWM0/WD INT GPort2_Bit1_PWM4/A2 GPort2_Bit0_PWM6/A3 GPort5_Bit1_PWM0 GPort5_Bit0_PWM2 GPort4_Bit7_PWM0 GPort4_Bit6_PWM2 GPort4_Bit5_PWM4 GPort4_Bit4_PWM6 XRES GPort4_Bit3_PWM0 GPort4_Bit2_PWM2 GPort4_Bit1_PWM4 GPort4_Bit0_PWM6 GPort1_Bit7_PWM0/A4 GPort1_Bit6_PWM2/A5 GPort1_Bit5_PWM4/A6 GPort1_Bit4_PWM6 GPort1_Bit3_PWM0 GPort1_Bit2_PWM2 GPort1_Bit1_PWM4 GPort1_Bit0_PWM6 Vdd Description Port 0, Bit 0, PWM 7. Port 0, Bit 1, PWM 5. Port 0, Bit 2, PWM 3. Port 0, Bit 3, PWM 1. Port 0, Bit 4, PWM 7. Port 0, Bit 5, PWM 5. Port 0, Bit 6, PWM 3. Port 0, Bit 7, PWM 1. Port 3, Bit 0, PWM 7. Port 3, Bit 1, PWM 5. Port 3, Bit 2, PWM 3. Port 3, Bit 3, PWM 1. Ground connection. Port 3, Bit 4, PWM 7. Port 3, Bit 5, PWM 5. Port 3, Bit 6, PWM 3. Port 3, Bit 7, PWM 1. Port 5, Bit 2, PWM 3. Port 5, Bit 3, PWM 1. I2C Clock. I2C Data. Port 2, Bit 3, PWM 3, Address 1. Address 0. Ground connection. Port 2, Bit 2, PWM 0, E2 Write Disable. Port 2, Bit 1, PWM 4, Address 2. Port 2, Bit 0, PWM 6, Address 3. Port 5, Bit 1, PWM 0. Port 5, Bit 0, PWM 2. Port 4, Bit 7, PWM 0. Port 4, Bit 6, PWM 2. Port 4, Bit 5, PWM 4. Port 4, Bit 4, PWM 6. Active high external reset with internal pull down. Port 4, Bit 3, PWM 0. Port 4, Bit 2, PWM 2. Port 4, Bit 1, PWM 4. Port 4, Bit 0, PWM 6. Port 1, Bit 7, PWM 0, Address 4. Port 1, Bit 6, PWM 2, Address 5. Port 1, Bit 5, PWM 4, Address 6. Port 1, Bit 4, PWM 6. Port 1, Bit 3, PWM 0. Port 1, Bit 2, PWM 2. Port 1, Bit 1, PWM 4. Port 1, Bit 0, PWM 6. Supply voltage. Figure 3. CY8C9540A 48-Pin Device 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 GPort0_Bit0_PWM7 GPort0_Bit1_PWM5 GPort0_Bit2_PWM3 GPort0_Bit3_PWM1 GPort0_Bit4_PWM7 GPort0_Bit5_PWM5 GPort0_Bit6_PWM3 GPort0_Bit7_PWM1 GPort3_Bit0_PWM7 GPort3_Bit1_PWM5 GPort3_Bit2_PWM3 GPort3_Bit3_PWM1 Vss GPort3_Bit4_PWM7 GPort3_Bit5_PWM5 GPort3_Bit6_PWM3 GPort3_Bit7_PWM1 GPort5_Bit2_PWM3 GPort5_Bit3_PWM1 I2C Serial Clock (SCL) I2C Serial Data (SDA) GPort2_Bit3_PWM3/A1 A0 Vss 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 SSOP Vdd GPort1_Bit0_PWM6 GPort1_Bit1_PWM4 GPort1_Bit2_PWM2 GPort1_Bit3_PWM0 GPort1_Bit4_PWM6 GPort1_Bit5_PWM4/A6 GPort1_Bit6_PWM2/A5 GPort1_Bit7_PWM0/A4 GPort4_Bit0_PWM6 GPort4_Bit1_PWM4 GPort4_Bit2_PWM2 GPort4_Bit3_PWM0 XRES GPort4_Bit4_PWM6 GPort4_Bit5_PWM4 GPort4_Bit6_PWM2 GPort4_Bit7_PWM0 GPort5_Bit0_PWM2 GPort5_Bit1_PWM0 GPort2_Bit0_PWM6/A3 GPort2_Bit1_PWM4/A2 INT GPort2_Bit2_PWM0/WD Document Number: 38-12036 Rev. *E Page 6 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A 100-Pin Part Pinout Table 6. 100-Pin Part Pinout (TQFP) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Name Description Pin No. 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Name Description DNU DNU GPort0_Bit3_PWM1 GPort0_Bit4_PWM7 GPort0_Bit5_PWM5 GPort0_Bit6_PWM3 GPort0_Bit7_PWM1 GPort3_Bit0_PWM7 GPort3_Bit1_PWM5 GPort3_Bit2_PWM3 GPort3_Bit3_PWM1 DNU DNU DNU VSS GPort3_Bit4_PWM15 GPort3_Bit5_PWM13 GPort3_Bit6_PWM11 GPort3_Bit7_PWM9 GPort5_Bit7_PWM15 GPort5_Bit6_PWM13 GPort5_Bit2_PWM11 GPort5_Bit3_PWM9 I2C Serial Clock (SCL) DNU DNU DNU I2C Serial Data (SDA) GPort2_Bit3_PWM11/A1 A0 DNU Vdd DNU VSS DNU GPort7_Bit7_PWM15 GPort7_Bit6_PWM14 GPort7_Bit5_PWM13 GPort7_Bit4_PWM12 GPort7_Bit3_PWM11 GPort7_Bit2_PWM10 GPort7_Bit1_PWM9 GPort7_Bit0_PWM8 GPort2_Bit2_PWM8/WD INT GPort2_Bit1_PWM12/A2 GPort2_Bit0_PWM14/A3 DNU DNU DNU DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. Port 0, Bit 3, PWM 1. Port 0, Bit 4, PWM 7. Port 0, Bit 5, PWM 5. Port 0, Bit 6, PWM 3. Port 0, Bit 7, PWM 1. Port 3, Bit 0, PWM 7. Port 3, Bit 1, PWM 5. Port 3, Bit 2, PWM 3. Port 3, Bit 3, PWM 1. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. Ground connection. Port 3, Bit 4, PWM 15. Port 3, Bit 5, PWM 13. Port 3, Bit 6, PWM 11. Port 3, Bit 7, PWM 9. Port 5, Bit 7, PWM 15. Port 5, Bit 6, PWM 13. Port 5, Bit 2, PWM 11. Port 5, Bit 3, PWM 9. I2C Clock. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. I2C Data. Port 2, Bit 3, PWM 11, Address 1. Address 0. DNU = Do Not Use; leave floating. Supply voltage. DNU = Do Not Use; leave floating. Ground connection. DNU = Do Not Use; leave floating. Port 7, Bit 7, PWM 15. Port 7, Bit 6, PWM 14. Port 7, Bit 5, PWM 13. Port 7, Bit 4, PWM 12. Port 7, Bit 3, PWM 11. Port 7, Bit 2, PWM 10. Port 7, Bit 1, PWM 9. Port 7, Bit 0, PWM 8. Port 2, Bit 2, PWM 8, E2 Write Disable. Port 2, Bit 7, PWM 0, Address 4. Port 2, Bit 6, PWM 2, Address 5. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. DNU GPort5_Bit1_PWM8 GPort5_Bit0_PWM10 GPort5_Bit4_PWM12 GPort5_Bit5_PWM14 GPort4_Bit7_PWM8 GPort4_Bit6_PWM10 GPort4_Bit5_PWM12 GPort4_Bit4_PWM14 DNU DNU XRES GPort4_Bit3_PWM0 GPort4_Bit2_PWM2 VSS GPort4_Bit1_PWM4 GPort4_Bit0_PWM6 GPort1_Bit7_PWM0/A4 GPort1_Bit6_PWM2/A5 GPort1_Bit5_PWM4/A6 DNU GPort1_Bit4_PWM6 DNU GPort1_Bit3_PWM0 DNU DNU GPort1_Bit2_PWM2 DNU GPort1_Bit1_PWM4 DNU GPort1_Bit0_PWM6 Vdd Vdd VSS VSS GPort6_Bit0_PWM0 GPort6_Bit1_PWM1 GPort6_Bit2_PWM2 GPort6_Bit3_PWM3 GPort6_Bit4_PWM4 GPort6_Bit5_PWM5 GPort6_Bit6_PWM6 GPort6_Bit7_PWM7 DNU GPort0_Bit0_PWM7 DNU GPort0_Bit1_PWM5 DNU GPort0_Bit2_PWM3 DNU DNU = Do Not Use; leave floating. Port 5, Bit 1, PWM 8. Port 5, Bit 0, PWM 10. Port 5, Bit 4, PWM 12. Port 5, Bit 5, PWM 14. Port 4, Bit 7, PWM 8. Port 4, Bit 6, PWM 10. Port 4, Bit 5, PWM 12. Port 4, Bit 4, PWM 14. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. Active high external reset with internal pull down. Port 4, Bit 3, PWM 0. Port 4, Bit 2, PWM 2. Ground connection. Port 4, Bit 1, PWM 4. Port 4, Bit 0, PWM 6. Port 1, Bit 7, PWM 0, Address 4. Port 1, Bit 6, PWM 2, Address 5. Port 1, Bit 5, PWM 4, Address 6. DNU = Do Not Use; leave floating. Port 1, Bit 4, PWM 6. DNU = Do Not Use; leave floating. Port 1, Bit 3, PWM 0. DNU = Do Not Use; leave floating. DNU = Do Not Use; leave floating. Port 1, Bit 2, PWM 2. DNU = Do Not Use; leave floating. Port 1, Bit 1, PWM 4. DNU = Do Not Use; leave floating. Port 1, Bit 0, PWM 6. Supply voltage. Supply voltage. Ground connection. Ground connection. Port 6, Bit 0, PWM 0. Port 6, Bit 1, PWM 1. Port 6, Bit 2, PWM 2. Port 6, Bit 3, PWM 3. Port 6, Bit 4, PWM 4. Port 6, Bit 5, PWM 5. Port 6, Bit 6, PWM 6. Port 6, Bit 7, PWM 7. DNU = Do Not Use; leave floating. Port 0, Bit 0, PWM 7. DNU = Do Not Use; leave floating. Port 0, Bit 1, PWM 5. DNU = Do Not Use; leave floating. Port 0, Bit 2, PWM 3. DNU = Do Not Use; leave floating. Document Number: 38-12036 Rev. *E Page 7 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Figure 4. CY8C9560A 100-Pin Device[2] DNU GPort0_Bit2_PWM3 DNU GPort0_Bit1_PWM5 DNU GPort0_Bit0_PWM7 DNU GPort6_Bit7_PWM7 GPort6_Bit6_PWM6 GPort6_Bit5_PWM5 GPort6_Bit4_PWM4 GPort6_Bit3_PWM3 GPort6_Bit2_PWM2 GPort6_Bit1_PWM1 GPort6_Bit0_PWM0 Vss Vss 90 89 88 Vdd Vdd GPort1_Bit0_PWM6 DNU GPort1_Bit1_PWM4 DNU GPort1_Bit2_PWM2 DNU 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 DNU GPort1_Bit3_PWM0 DNU GPort1_Bit4_PWM6 DNU GPort1_Bit5_PWM4/A6 GPort1_Bit6_PWM2/A5 GPort1_Bit7_PWM0/A4 GPort4_Bit0_PWM6 GPort4_Bit1_PWM4 Vss GPort4_Bit2_PWM2 GPort4_Bit3_PWM0 XRES DNU DNU GPort4_Bit4_PWM14 GPort4_Bit5_PWM12 GPort4_Bit6_PWM10 GPort4_Bit7_PWM8 GPort5_Bit5_PWM14 GPort5_Bit4_PWM12 GPort5_Bit0_PWM10 GPort5_Bit1_PWM8 DNU DNU DNU 100 99 98 97 96 95 94 93 92 91 26 27 28 29 30 31 32 33 34 35 Note 2. DNU = Do Not Use; leave floating. Document Number: 38-12036 Rev. *E GPort7_Bit7_PWM15 GPort7_Bit6_PWM14 GPort7_Bit5_PWM13 GPort7_Bit4_PWM12 GPort7_Bit3_PWM11 GPort7_Bit2_PWM10 GPort7_Bit1_PWM9 GPort7_Bit0_PWM8 GPort2_Bit2_PWM8/WD INT GPort2_Bit1_PWM12/A2 GPort2_Bit0_PWM14/A3 DNU DNU DNU I2C Serial Data (SDA) GPort2_Bit3_PWM11/A1 A0 DNU Vdd DNU Vss DNU 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 DNUa DNU GPort0_Bit3_PWM1 GPort0_Bit4_PWM7 GPort0_Bit5_PWM5 GPort0_Bit6_PWM3 GPort0_Bit7_PWM1 GPort3_Bit0_PWM7 GPort3_Bit1_PWM5 GPort3_Bit2_PWM3 GPort3_Bit3_PWM1 DNU DNU DNU Vss GPort3_Bit4_PWM15 GPort3_Bit5_PWM13 GPort3_Bit6_PWM11 GPort3_Bit7_PWM9 GPort5_Bit7_PWM15 GPort5_Bit6_PWM13 GPort5_Bit2_PWM11 GPort5_Bit3_PWM9 I2C Serial Clock (SCL) DNU 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 TQFP 87 86 85 84 83 82 81 80 79 78 77 76 Page 8 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Pin Descriptions Extendable Soft Addressing The A0 line defines the corresponding bit of the I C address. This pin must be pulled up or down. If A0 is a strong pull up or a strong pull down (wired through 330 or less resistor to Vdd or Vss), then that is the only address line being specified and the A1-A6 lines are used as GPIO. If A0 is a weak pull up or a weak pull down (connected to Vdd or Vss through 75K- 200K ohm resistor), then A0 is not the only externally defined address bit. There is a pin assigned to be A1 if it is needed. This pin can be pulled up or pulled down strong or weak with a resistor. As with A0, the type of pull determines whether the address bit is the last externally defined address bit. Differently from A0, A1 is not dedicated as an address pin. It is only used if A0 is not the only address bit externally defined. There are also predefined pins for A2, A3, A4, A5, and A6 that is only used for addressing if needed. The last address bit in the chain is pulled strong. That way, only the number of pins needed to assign the address desired for the part are allocated as address pins, any pins not used for address bits can be used as GPIO pins. The Table 2 on page 4 defines the resulting device I2C address. 2 Working with PWMs There are four independent PWMs in the CY8C9520A, eight in the CY8C9540A and sixteen in the CY8C9560A. Each I/O pin can be configured as a PWM output by writing ‘1’ to the corresponding bit of the Select PWM register (see Table 8 on page 12). The next step of PWM configuration is clock source selection using the Config PWM registers. There are six available clock sources: 32 kHz (default), 24 MHz, 1.5 MHz, 93.75 kHz, 367.6 Hz or previous PWM output. (see Figure 5) Figure 5. Clock Sources 32 kHz 24 mHz 1.5 mHz 93.75 kHz Divider (1-255) 367.6 Hz 93.75 kHz Interrupt Pin (INT) The interrupt output (if enabled) is activated if one of these events occurs: ■ ■ By default, 32 kHz is selected as the PWM clock. PWM Period registers are used to set the output period: One of the GPIO port pins changes state and the corresponding bit in the Interrupt Mask register is set low. When a PWM driven by the slowest clock source (367.6 Hz) and assigned to a pin changes state and the pin’s corresponding bit in the Interrupt Mask register is set low. t OUT = Period × t CLK Allowed values are between 1 and FFh. The PWM Pulse Width register sets the duration of the PWM output pulse. Allowed values are between zero and the (Period-1) value. The duty cycle ratio is computed using thsi equation: The interrupt line is deactivated when the master device performs a read from the corresponding Interrupt Status register. Write Disable Pin (WD) If this feature is enabled, ‘0’ allows writes to the EEPROM and ‘1’ blocks any memory writes. This pin is checked immediately before performing any write to memory. If the EEE bit in the Enable register is not set (EEPROM disabled) or bit EERO is set (EEPROM is read-only) then WD line level is ignored. Note that ‘1’ on this line blocks all commands that perform operations with EEPROM (see Table 15 on page 14). This line may be enabled/disabled by bit 1 of the Enable register (2Dh): ‘1’ enables WD function, ‘0’ disables. PulseWidth DutyCycle = -----------------------------Period External Reset Pin (XRES) A full device reset is caused by pulling the XRES pin high. The XRES pin has an always-on pull down resistor, so it does not require an external pull down for operation. It can be tied directly to ground or left open. Behavior after XRES is similar to POR. When the part is held in reset, all In and Out pins are held at their default High-Z State. Document Number: 38-12036 Rev. *E Page 9 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Figure 6. Memory Reading and Writing Slave Address Memory Address R/W S A6 A5 A4 A3 A2 A1 A0 0 Start A High(Addr) A Low(Addr) A R/W S A6 A5 A4 A3 A2 A1 A0 1 A data(Addr) A data(Addr+1) A ... N Stop P ACK from Slave ACK from Slave ACK from Slave ACK from Slave ACK from Master ACK from Master No ACK from Master Reading from EEPROM Slave Address Memory Address Up to the End of Address Space R/W S A6 A5 A4 A3 A2 A1 A0 0 Start A High(Addr) A Low(Addr) A data 1 A data 2 A ... A Stop P ACK from Slave ACK from Slave ACK from Slave If current address crosses 64-byte block boundary, then device performs real writing to EEPROM Writing to EEPROM Figure 7. Port Reading and Writing in Multi-Port Device Slave Address Register Address = 1 Reading from GPort 2 At this moment, device performs reading from GPort 1 R/W S A6 A5 A4 A3 A2 A1 A0 0 Start A 0 0 0 0 0 0 0 1 A R/W S A6 A5 A4 A3 A2 A1 A0 1 A data from GPort1 A data from GPort 2 A ... Stop N P ACK from Slave ACK from Slave ACK from Master No ACK from Master Reading from GPort 1 Slave Address Register Address = 09h At this moment, device performs output to GPort 1 R/W Output to GPort 2 Output to GPort 3 Stop A 0 0 0 0 1 0 0 1 A data from GPort1 A data from GPort 2 A data from GPort 3 ACK from Slave A ... P S A6 A5 A4 A3 A2 A1 A0 0 Start ACK from Slave ACK from Slave ACK from Slave Writing from GPort 1 Document Number: 38-12036 Rev. *E Page 10 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Register Mapping Table The register address is auto-incrementing. If the master device writes or reads data to or from one register and then continues data transfer in the same I2C transaction, sequential bytes are written or read to or from the following registers. For example, if the first byte is sent to the Output Port 1 register, then the next bytes are written to Output Port 2, Output Port 3, Output Port 4 etc. The first byte of each write transaction is treated as the register address. To read data from a seires of registers, the master device must write the starting register address byte then perform a start and series of read transactions. If no address was sent, reads start from address 0. To read a specific register address, the master device must write the register address byte, then perform a start and read transaction. See Figure 7 on page 10. The device’s register mapping is listed in Table 7. Table 7. The Device Register Address Map Address 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h Register Input Port 0 Input Port 1 Input Port 2 Input Port 3 Input Port 4 Input Port 5 Input Port 6 Input Port 7 Output Port 0 Output Port 1 Output Port 2 Output Port 3 Output Port 4 Output Port 5 Output Port 6 Output Port 7 Interrupt Status Port 0 Interrupt Status Port 1 Interrupt Status Port 2 Interrupt Status Port 3 Interrupt Status Port 4 Interrupt Status Port 5 Interrupt Status Port 6 Interrupt Status Port 7 Port Select Interrupt Mask Default Register Value None None None None None None None None FFh FFh FFh FFh FFh FFh FFh FFh 00h 00h 00h 00h 00h 00h 00h 00h 00h FFh Table 7. The Device Register Address Map (continued) Address 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh 20h 21h 22h 23h 24h 25h 26h 27h 28h 29h 2Ah 2Bh 2Ch 2Dh 2Eh 2Fh 30h Register Default Register Value 00h 00h FFh 00h 00h 00h 00h 00h 00h None None None None 00h 00h FFh 80h FFh 00h 20h/40h/60h 00h 00h Select PWM for Port Output 00h Inversion Pin Direction - Input/Output Drive Mode - Pull Up Drive Mode - Pull Down Drive Mode - Open Drain High Drive Mode - Open Drain Low Drive Mode - Strong Drive Mode - Slow Strong Drive Mode - High-Z Reserved Reserved Reserved Reserved PWM Select Config PWM Period PWM Pulse Width PWM Programmable Divider Enable WDE, EEE, EERO Device ID/Status Watchdog Command Register Descriptions The registers for the CY8C95xx are described in the sections that follow. Note that the PWM registers are located at addresses 28h to 2Bh. Input Port Registers (00h - 07h) These registers represent actual logical levels on the pins and are used for I/O port reading operations. They are read only. The Inversion registers changes the state of reads to these ports. Output Port Registers (08h - 0Fh) These registers are used for writing data to GPIO ports. By default, all ports are in the pull up mode allowing quasi-bidirectional I/O. To allow input operations without reconfiguration, these registers have to store ’1’s. Output register data also affects pin states when PWMs are enabled. See Table 8 on page 12 for details. See Figure 7 on page 10 illustrates port read/write procedures. The Inversion registers have no effect on these ports. Document Number: 38-12036 Rev. *E Page 11 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Int. Status Port Registers (10h - 17h) Each ’1’ bit in these registers signals that there was a change in the corresponding input line since the last read of that Interrupt Status register. Each Interrupt (Int.) Status register is cleared only after a read of that register. If a PWM is assigned to a pin, then all state changes of the PWM sets the corresponding bit in the Interrupt Status register. If the pin's interrupt mask is cleared and the PWM is set to the slowest possible rate allowed (driven by the programmable clock source with divide register 2Dh set to FFh), then the INT line also drives on the PWM state change. The Input registers' logic is presented in Table 9. These registers have no effect on outputs or PWMs. Table 9. Inversion Register Logic Pin State 0 1 0 1 Invert 0 0 1 1 Input 0 1 1 0 Port Select Register (18h) This register configures the GPort. Write a value of 0-7 to this register to select the port to program with registers 19h-23h. Port Direction Register (1Ch) Each bit in a port is configurable as either an input or an output. To perform this configuration, the Port Direction register (1Ch) is used for the GPort selected by the Port Select register (18h). If a bit in this register is set (written with '1'), the corresponding port pin is enabled as an input. If a bit in this register is cleared (written with '0'), the corresponding port pin is enabled as an output. Interrupt Mask Port Register (19h) The Interrupt Mask register enables or disables activation of the INT line when GPIO input levels are changed. Each ’1’ in the Interrupt Mask register masks (disables) interrupts generated from the corresponding input line of the GPort selected by the Port Select register (18h). Drive Mode Registers (1Dh-23h) Each port's data pins can be set separately to one of seven available modes: pull up or down, open drain high/low, strong drive fast/slow, or high-impedance input. To perform this configuration, the seven drive mode registers are used for the GPort selected by the Port Select register (18h). Each ’1’ written to this register changes the corresponding line drive mode. Registers 1Dh through 23h have last register priority meaning that the bit set to high in which the last register was written overrides those that came before. Reading these registers reflects the actual setting, not what was originally written. Table 10. Drive Mode Register Settings Reg. 1Dh 1Eh 1Fh 20h 21h 22h Pin State Resistive Pull Up Description Resistive High, Strong Low (default) Slow Strong High, High Z Low Slow Strong Low, High Z High Strong High, Strong Low, Fast Output Mode Strong High, Strong Low, Slow Output Mode High Z Select PWM Register (1Ah) This register allows each port to act as a PWM output. By default, all ports are configured as GPIO lines. Each ’1’ in this register connects the corresponding pin of the GPort selected by the Port Select register (18h) to the PWM output. Output register data also affects the pin state when a PWM is enabled. See Table 8. Note that a pin used as PWM output must be configured to the appropriate drive mode. See Table 10 on page 12 for more information. Table 8 describes the logic of the Output and Select PWM registers. Table 8. Output and Select PWM Registers Logic Output 0 1 0 1 Select PWM 0 0 1 1 Pin State 0 1 0 Current PWM Resistive Pull Down Strong High, Resistive Low Open Drain High Open Drain Low Strong Drive Slow Strong Drive High Impedance Inversion Register (1Bh) This register can invert the logic of the input ports. Each ’1’ written to this register inverts the logic of the corresponding bit in the Input register of the GPort selected by the Port Select register (18h). 23h PWM Select Register (28h) This register is configures the PWM. Write a value of 00h-0Fh to this register to select the PWM to program with registers 29h-2Bh. Document Number: 38-12036 Rev. *E Page 12 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Config (29h) This register selects the clock source for the PWM selected by the PWM Select register (28h) and interrupt logic. There are six available clock sources: 32 kHz (default), 24 MHz, 1.5 MHz, 93.75 kHz, 367.6 Hz, or previous PWM output. The 367.6 Hz clock is user programmable. It divides the 93.75 kHz clock source by the divisor stored in the Divider register (2Ch). The default divide ratio is 255. (see Table 11 for details). By default, all PWMs are clocked from 32 kHz. Table 11. PWM Clock Sources Config PWM xxxxx000b xxxxx001b xxxxx010b xxxxx011b xxxxx100b xxxxx101b 24 MHz 1.5 MHz 93.75 kHz 367.6 Hz (programmable) Previous PWM PWM Clock Source 32 kHz (default) Divider Register (2Ch) This register sets the frequency on the output of the programmable divider: Frequency = 93.75 kHz . Divider Allowed values are between 1 and 255. Enable Register (2Dh) The WDE bit configures the write disable pin to operate either as a GPIO or as WD. It also enables/disables EEPROM operations (EEE bit) or makes the EEPROM read-only (EERO bit). Bit assignments are shown in Table 13 on page 13. Table 13. Enable Register Bit Function Default 7 6 5 4 3 2 EERO 0 1 EEE 0 0 WDE 0 Reserved Reserved Each PWM can generate an interrupt at the rising or falling edge of the output pulse. There is a limitation on the clock source for a PWM to generate an interrupt. Only the slowest speed source (programmed to 367.6 Hz) with the divider equal to 255 allows interrupt generation. Consequently, to create a PWM interrupt, it is necessary to choose the programmable divider output as the clock source (write xxxxx100b to Config register (29h)), write 255 to the Divide register (2Ch), and select PWM for pin output (1Ah). Interrupt status is reflected in the Interrupt Status registers (10h-17h) and can cause INT line activation if enabled by the corresponding mask bit in the Interrupt Mask register: Each ’1’ enables the corresponding feature, ’0’ disables. Writes to this register differ from other registers. The write sequence to modify the Enable register is as follows: 1. Send device I2C address with bit 0. 2. Send register address 2Dh. 3. Send unlock key - the sequence of three bytes: 43h, 4Dh, 53h; ('C', 'M', 'S' in ASCII bytes). 4. Send new Enable register value. This write sequence secures the register from accidental changes. The register can be read without the use of the unlock key. By default, EERO and EEPROM (EEE bit) are disabled and WD line (WDE bit) is set to GPIO (WD disabled). Period Register (2Ah) Table 12. Period Register Config PWM xxxx0xxxb xxxx1xxxb PWM Interrupt on Falling pulse edge (default) Rising pulse edge When performing a burst write operation that crosses this register, the data written to this register is ignored and the address increments to 2Eh. Device ID/Status Register (2Eh) This register sets the period of the PWM counter. Allowed values are between 1 and FFh. The effective output waveform period of the PWM is: This register stores device identifiers (2xh/4xh/6xh) and reflects which settings were loaded during startup, either factory defaults (FD) or user defaults (UD). By default during startup, the device attempts to load the user default block. If it is corrupted then factory defaults are loaded and the low nibble of this register is set high to inform which set is active. The high nibble is always equal to 2 for CY8C9520A, 4 for CY8C9540A, and 6 for CY8C9560A. This register is read-only. Table 14. Device ID Status Register Bit 7 6 5 4 3 2 Reserved 1 0 FD/UD tOUT = Period ⋅ tCLK Pulse Width Register (2Bh) This register sets the pulse width of the PWM output. Allowed values are between zero and the (Period - 1) value. The duty cycle ratio can be computed using the following equation: DutyCycle = PulseWidth . Period Function Device Family (2, 4,or 6) Document Number: 38-12036 Rev. *E Page 13 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Watchdog Register (2Fh) This register controls the internal Watchdog timer. This timer can trigger a device reset if the device is not responding to I2C requests due to misconfiguration. Device operation is not affected when the Watchdog register = 0. If the I2C master writes any non zero value to the Watchdog register, the countdown mechanism is activated and each second the register is decremented. Upon transition from 1 to 0, the device is rebooted, which restores user defaults. After reboot, the Watchdog register value is reset to zero. Any I2C transaction (addressing the Expander) resets the Watchdog register to the previously stored value. Any device reboot (caused by a POR or Watchdog) sets the Watchdog register to zero (turns off the Watchdog feature). The Watchdog timer can be disabled by writing zero to the Watchdog register (2Fh) or by using the Reconfigure Device Cmd (07h). Note The Watchdog timer is not intended to track precise time intervals. The timer's frequency can vary in range between -50% on up to +100%. This variation must be taken into account when selecting the appropriate value for the Watchdog register. Write E2 POR Defaults Cmd (03h) This command sends new power up defaults to the CY8C95xx without changing current settings unless the 07h command is issued afterwards. This command is followed by 147 data bytes according to Table 16. The CRC is calculated as the XOR of the 146 data bytes (00h-91h). If the CRC check fails or an incomplete block is sent, then the slave responds with a NAK and the data does not get saved to EEPROM. To define new POR defaults the user must: ■ ■ ■ Write command 03h Write 146 data bytes with new values of registers Write 1 CRC byte calculated as XOR of previous 146 data bytes. Content of the data block is described in Table 16. Table 16. POR Defaults Data Structure Offset 00h – 07h 08h – 0Fh 10h – 17h 18h – 1Fh 20h – 27h 28h 29h 2Ah 2Bh 2Ch 2Dh 2Eh 2Fh – 35h 36h – 3Ch 3Dh – 43h 44h – 4Ah 4Bh – 51h 52h – 58h 59h – 5Fh 60h 61h 62h 63h – 65h … 8Dh – 8Fh 90h 91h 92h Output Port 0-7 Interrupt mask Port 0-7 Select PWM Port 0-7 Inversion Port 0-7 Pin Direction Port 0-7 Resistive pull up Drive Mode Port 0 Resistive pull down Drive Mode Port 0 Open drain high Drive Mode Port 0 Open drain low Drive Mode Port 0 Strong drive Drive Mode Port 0 Slow strong drive Drive Mode Port 0 High impedance Drive Mode Port 0 Drive Modes Port 1 Drive Modes Port 2 Drive Modes Port 3 Drive Modes Port 4 Drive Modes Port 5 Drive Modes Port 6 Drive Modes Port 7 Config setting PWM0 Period setting PWM0 Pulse Width setting PWM0 PWM1 settings … PWM15 settings Divider Enable CRC Value Command Register (30h) This register sends commands to the device, including current configuration as new POR defaults, restore factory defaults, define POR defaults, read POR defaults, write device configuration, read device configuration, and reconfigure device with stored POR defaults. The command set is presented in Table 15. Note Registers are not restored in parallel. Do not assume any particular order to the restoration process. Table 15. Available Commands Command 01h 02h 03h 04h 05h 06h 07h Description Store device configuration to EEPROM POR defaults Restore Factory Defaults Write EEPROM POR defaults Read EEPROM POR defaults Write device configuration Read device configuration Reconfigure device with stored POR defaults Commands Description Store Config to E2 POR Defaults Cmd (01h) The current ports settings (drive modes and output data) and other configuration registers are saved in the EEPROM by using the store configuration command (Cmd). These settings are automatically loaded after the next device power up or if the 07h command is issued. Restore Factory Defaults Cmd (02h) This command replaces the saved user configuration with the factory default configuration. Current settings are unaffected by this command. New settings are loaded after the next device power up or if the 07h command is issued. Document Number: 38-12036 Rev. *E Page 14 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Read E2 POR Defaults Cmd (04h) This command reads the POR settings stored in the EEPROM. To read POR defaults the user must: ■ ■ ■ Read Device Config Cmd (06h) This command reads the current device configuration. It gives the user ‘flat-address-space’ access to all device settings. To read device configuration the user must: ■ ■ ■ Write command 04h Read 146 data bytes (see Table 16) Read 1 CRC byte. Write command 06h Read 146 data bytes (see Table 16). Read 1 CRC byte. Write Device Config Cmd (05h) This command sends a new device configuration to the CY8C95xx. It is followed by 146 data bytes according to Table 16. The CRC is calculated as the XOR of the 146 data bytes (00h-91h). If the CRC check fails or an incomplete block is sent, then the slave responds with a NAK and the device does not use the data. This gives the user ‘flat-address-space’ access to all device settings. To set the current device configuration the user must: ■ ■ ■ Reconfigure Device Cmd (07h) This command immediately reconfigures the device with actual POR defaults from EEPROM. It has the same effect on the registers as a POR. Write command 05h Write 146 data bytes with new values of registers Write 1 CRC byte calculated as XOR of previous 146 data bytes. If the CRC check passes, then the device uses the new settings immediately. Content of the data block is described in Table 16. Document Number: 38-12036 Rev. *E Page 15 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Electrical Specifications This section lists the DC and AC electrical specifications of the CY8C95xxA device. For the most up to date electrical specifications, confirm that you have the most recent data sheet by going to the web at http://www.cypress.com. Specifications are valid for -40°C ≤ TA ≤ 85°C and TJ ≤ 100°C, except where noted. Table 17 lists the units of measure that are used in this section. Table 17. Units of Measure Symbol °C kHz MHz μs μV μVrms Unit of Measure degree Celsius kilohertz megahertz microsecond microvolts microvolts root-mean-square Symbol mA nA ns pF V Unit of Measure milli-ampere nanoampere nanosecond picofarad volts Absolute Maximum Ratings Table 18. Absolute Maximum Ratings Symbol TSTG Description Storage temperature Min -55 Typ 25 Max +100 Units °C Notes Higher storage temperatures reduces data retention time. Recommended storage temperature is +25°C ± 25°C. Extended duration storage temperatures above 65°C degrades reliability. TBAKETEMP Bake Temperature – 125 TBAKETIME Bake Time TA Vdd VIO VIOZ IMIO ESD LU Ambient temperature with power applied Supply voltage on Vdd relative to Vss DC input voltage DC voltage applied to tri-state Maximum current into any port pin Electro Static Discharge Voltage Latch up current See package label -40 -0.5 Vss - 0.5 Vss - 0.5 -25 2000 – – See package label 72 °C Hours °C V V V mA V mA – – – – – – – +85 +6.0 Vdd + 0.5 Vdd + 0.5 +50 – 200 Human Body Model ESD. Operating Temperature Table 19. Operating Temperature Symbol TA TJ Description Ambient temperature Junction temperature Min -40 -40 Typ – – Max +85 +100 Units °C °C Notes The temperature rise from ambient to junction is package specific. See “Thermal Impedances per Package” on page 23. The user must limit the power consumption to comply with this requirement. Page 16 of 32 Document Number: 38-12036 Rev. *E [+] Feedback CY8C9520A CY8C9540A, CY8C9560A DC Electrical Characteristics DC Chip-Level Specifications Table 20 lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only. Table 20. CY8C9520A DC Chip-Level Specifications Symbol Description Vdd Supply voltage IDD Supply current Vdd 5V IDD3 Supply current Vdd 3.3V Min 3.00 – – Typ – 3.8 2.3 Max 5.25 5 3 Units V mA mA Notes Conditions are 5.0V, TA = 25°C, IOH = 0. Conditions are 3.3V, TA = 25°C, IOH = 0. Table 21. CY8C9540A DC Chip-Level Specifications Symbol Description Vdd Supply voltage IDD Supply current Vdd 5V IDD3 Supply current Vdd 3.3V Min 3.00 – – Typ – 6 3.3 Max 5.25 9 6 Units V mA mA Notes Conditions are 5.0V, TA = 25°C, IOH = 0. Conditions are 3.3V, TA = 25°C, IOH = 0. Table 22. CY8C9560A DC Chip-Level Specifications Symbol Description Vdd Supply voltage IDD Supply current Vdd 5V IDD3 Supply current Vdd 3.3V DC Programming Specifications The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only. Table 23. DC Programming Specifications Symbol FlashENPB FlashENT FlashDR Description Flash (EEPROM) endurance (by block) Flash endurance (total)[3] Flash data retention Min 10,000 1,800,000 10 Typ – – – Max – – – Units – – Years Notes Erase/write cycles by block. Erase/write cycles. Min 3.00 – – Typ – 15 5 Max 5.25 25 9 Units V mA mA Notes Conditions are 5.0V, TA = 25°C, IOH = 0. Conditions are 3.3V, TA = 25°C, IOH = 0. DC I2C Specifications Table 24 lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only. Table 24. DC I2C Specifications[4] Symbol VILI2C VIHI2C Description Input low level Input high level Min – – 0.7 × VDD Typ – – – Max 0.3 × VDD 0.25 × VDD – Units V V V Notes 3.0 V ≤ VDD ≤ 3.6 V 4.75 V ≤ VDD ≤ 5.25 V 3.0 V ≤ VDD ≤ 5.25 V Note 3. A maximum of 180 x 10,000 block endurance cycles is allowed. This may be balanced between operations on 180x1 blocks of 10,000 maximum cycles each, 180x2 blocks of 5,000 maximum cycles each, or 180x4 blocks of 2,500 maximum cycles each (to limit the total number of cycles to 180x10,000 and that no single block ever sees more than 10,000 cycles). 4. All GPIO meet the DC GPIO VIL and VIH specifications found in the DC GPIO Specifications sections. The I2C GPIO pins also meet the above specs. Document Number: 38-12036 Rev. *E Page 17 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A DC GPIO Specifications The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only. Table 25. DC GPIO Specifications Symbol VOH Description High output level Min Vdd - 1.0 Typ – Max – Units V Notes IOH = 10 mA for any one pin, Vdd = 4.75 to 5.25V. 40 mA maximum combined IOH for GPort0; GPort2_Bit3; GPort3; GPort5_Bit2, 3, 6, 7; GPort6. 40 mA maximum combined IOH for GPort1; GPort2_Bit0, 1, 2; GPort4; GPort5_Bit0, 1, 4, 5; GPort7. 80 mA maximum combined IOH. IOL = 25 mA for any one pin, Vdd = 4.75 to 5.25V. 100 mA maximum combined IOL for GPort0; GPort2_Bit3; GPort3; GPort5_Bit2, 3, 6, 7; GPort6. 100 mA maximum combined IOL for GPort1; GPort2_Bit0, 1, 2; GPort4; GPort5_Bit0, 1, 4, 5; GPort7. 200 mA maximum combined IOL. VOH = Vdd-1.0V, see the limitations of the total current in the note for VOH VOL = 0.75V, see the limitations of the total current in the note for VOL Vdd = 3.0 to 5.5. Vdd = 3.0 to 5.5. Gross tested to 1 μA. Package and pin dependent. Temp = 25°C. Package and pin dependent. Temp = 25°C. VOL Low output level – – 0.75 V IOH IOL VIL VIH IIL CIN COUT High Level Source Current Low Level Sink Current Input low level Input high level Input leakage (absolute value) Capacitive load on pins as input Capacitive load on pins as output 10 25 – 2.1 – – – – – – – 1 3.5 3.5 – – 0.8 – – 10 10 mA mA V V nA pF pF Document Number: 38-12036 Rev. *E Page 18 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A AC Electrical Characteristics AC GPIO Specifications Table 26 lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only or unless otherwise specified. Table 26. AC GPIO Specifications Symbol FGPIO TRiseF TFallF TRiseS TFallS Description GPIO Operating Frequency Rise time, normal strong mode, Cload = 50 pF Fall time, normal strong mode, Cload = 50 pF Rise time, slow strong mode, Cload = 50 pF Fall time, slow strong mode, Cload = 50 pF Min 0 3 2 10 10 Typ – – – 27 22 Max 12 18 18 – – Units MHz ns ns ns ns Notes Normal Strong Mode Vdd = 4.75 to 5.25V, 10% - 90% Vdd = 4.75 to 5.25V, 10% - 90% Vdd = 3 to 5.25V, 10% - 90% Vdd = 3 to 5.25V, 10% - 90% Figure 8. GPIO Timing Diagram 90% GPIO Pin Output Voltage 10% TRiseF TRiseS TFallF TFallS AC PWM Specifications Table 27 lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only or unless otherwise specified. Table 27. AC PWM Specifications Symbol Description Jitter24MHzPWM 24 MHz based PWM peak-to-peak period jitter Jitter32kHzPWM F24MHzPWM F32kHzPWM F1.5MHzPWM F93.75kHzPWM 32 kHz-based PWM peak-to-peak period jitter Input Frequency of 24 MHz based PWM Input Frequency of 32 kHz based PWM Input frequency of 1.5 MHz based PWM Input Frequency of 93.75 kHz based PWM Min – Typ 0.1 Max 1.5 Units % Notes 24 MHz, 1.5 MHz, 93.75 kHz and 367.6 Hz (programmable) sources. 32 kHz clock source. – 23.4 15 1.46 91.40 2.5 24 32 1.5 93.75 5.0 24.6 64 1.53 96.09 % MHz kHz MHz kHz Document Number: 38-12036 Rev. *E Page 19 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A AC I2C Specifications Table 28 lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only or unless otherwise specified. Table 28. AC Characteristics of the I2C SDA and SCL Pins Symbol Description Standard Mode Min Max 0 100 4.0 – 4.7 4.0 4.7 0 250 4.0 4.7 – – – – – – – – – Fast Mode Min Max 0 – 0.6 – 1.3 0.6 0.6 0 1003 0.6 1.3 0 – – – – – – – – Units kHz μs μs μs μs μs ns μs μs ns Notes SCL clock frequency FSCLI2C THDSTAI2C Hold time (repeated) START condition. After this period, the first clock pulse is generated. TLOWI2C LOW period of the SCL clock HIGH period of the SCL clock THIGHI2C TSUSTAI2C Setup time for a repeated START condition THDDATI2C Data hold time TSUDATI2C Data setup time TSUSTOI2C Setup time for STOP condition Bus free time between a STOP and START TBUFI2C Condition TSPI2C Pulse width of spikes are suppressed by the input filter. Figure 9. Definition for Timing for Fast/Standard Mode on the I2C Bus I2C_SDA TSUDATI2C THDSTAI2C I2C_SCL TSPI2C THDDATI2CTSUSTAI2C TBUFI2C THIGHI2C TLOWI2C S START Condition AC EEPROM Write Specifications TSUSTOI2C Sr Repeated START Condition P STOP Condition S Table 29 lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 85°C, or 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only or unless otherwise specified. Table 29. AC EEPROM Write Specifications Symbol TEEPROMWrite_Hot TEEPROMWrite_Cold Description EEPROM Erase + Write time EEPROM Erase + Write time Min – – Typ – – Max 100 200 Units ms ms Notes 0°C ≤ Tj ≤ 100°C -40°C ≤ Tj ≤ 0°C Document Number: 38-12036 Rev. *E Page 20 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Packaging Dimensions This section illustrates the packaging specifications for the CY8C95xxA device, along with the thermal impedances for each package and the solder reflow peak temperature. Important Note Emulation tools may require a larger area on the target PCB than the chip’s footprint. For a detailed description of the emulation tools’ dimensions, refer to the emulator pod drawings at http://www.cypress.com. Figure 10. 28-Pin (210-Mil) SSOP 51-85079 *D Document Number: 38-12036 Rev. *E Page 21 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Figure 11. 48-Pin (300-Mil) SSOP .020 24 1 0.395 0.420 0.292 0.299 DIMENSIONS IN INCHES MIN. MAX. 25 48 0.620 0.630 0.088 0.092 0.095 0.110 SEATING PLANE GAUGE PLANE .010 0.005 0.010 0.025 BSC 0.004 0.008 0.0135 0.008 0.016 0°-8° 0.024 0.040 51-85061 *D Figure 12. 100-Pin (14 x 14 x 1.0 mm) TQFP 51-85048 *D Document Number: 38-12036 Rev. *E Page 22 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Thermal Impedances Table 30. Thermal Impedances per Package Package 28 SSOP 48 SSOP 100 TQFP Typical θJA [5] 101 °C/W 69 °C/W 48 °C/W Solder Reflow Peak Temperature Table 31 lists the minimum solder reflow peak temperature to achieve good solderability. Table 31. Solder Reflow Peak Temperature Package 28 SSOP 48 SSOP 100 TQFP Maximum Peak Temperature 260 °C 260 °C 260 °C Time at Maximum Peak Temperature 20 s 20 s 20 s Notes 5. TJ = TA + POWER x θJA. Document Number: 38-12036 Rev. *E Page 23 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Features and Ordering Information Table 32 lists the CY8C95xxA device’s key package features and ordering codes. A definition of the ordering number code follows. Table 32. CY8C95xxA Device Key Features and Ordering Information Package 28 Pin (210 Mil) SSOP 28 Pin (210 Mil) SSOP (Tape and Reel) 48 Pin (300 Mil) SSOP 48 Pin (300 Mil) SSOP (Tape and Reel) 100 Pin TQFP 100 Pin TQFP (Tape and Reel) Ordering Code[6] CY8C9520A-24PVXI CY8C9520A-24PVXIT CY8C9540A-24PVXI CY8C9540A-24PVXIT CY8C9560A-24AXI CY8C9560A-24AXIT EEPROM (Bytes) 3K 3K 11K 11K 27K 27K Temperature Range -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PWM Sources 4 4 8 8 16 16 Configurable I/O Pins 20 20 40 40 60 60 Ordering Code Definitions CY 8 C 9 xxx-SPxx Package Type: Thermal Rating: PX = PDIP Pb-Free C = Commercial SX = SOIC Pb-Free I = Industrial PVX = SSOP Pb-Free E = Extended LFX/LKX/LTX/LQX/LCX = QFN Pb-Free AX = TQFP Pb-Free Speed: 24 MHz Part Number Family Code Technology Code: C = CMOS Marketing Code: 8 = Cypress PSoC Company ID: CY = Cypress Note 6. The A after the existing port expander part number indicates new device firmware. Document Number: 38-12036 Rev. *E Page 24 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Acronyms Table 33 lists the acronyms that are used in this document. Table 33. Acronyms Used in this Datasheet Acronym AC API CMOS CRC DC EEPROM GPIO MSB PCB Description alternating current application programming interface complementary metal oxide semiconductor cyclic redundancy check direct current electrically erasable programmable read-only memory general purpose I/O most-significant bit printed circuit board Acronym POR PSoC® PWM SSOP TQFP UART USB WDT XRES power on reset Programmable System-on-Chip pulse width modulator shrink small-outline package thin quad flat pack universal asynchronous reciever / transmitter universal serial bus watchdog timer external reset Description Reference Documents Communication – I2C Port Expander with Flash Storage – AN2304 (001-27119) Document Conventions Units of Measure Table 34 lists the units of measures. Table 34. Units of Measure Symbol °C pF Hz kHz MHz kΩ Ω Unit of Measure degree Celsius picofarad Hertz kilohertz megahertz kilohm ohm microampere milliampere Symbol nA µs ms ns V W mm % Unit of Measure nanoampere microsecond millisecond nanosecond volts watt millimeter percent µA mA Numeric Conventions Hexadecimal numbers are represented with all letters in uppercase with an appended lowercase ‘h’ (for example, ‘14h’ or ‘3Ah’). Hexadecimal numbers may also be represented by a ‘0x’ prefix, the C coding convention. Binary numbers have an appended lowercase ‘b’ (for example, 01010100b’ or ‘01000011b’). Numbers not indicated by an ‘h’ or ‘b’ are decimals. Document Number: 38-12036 Rev. *E Page 25 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Glossary active high 1. A logic signal having its asserted state as the logic 1 state. 2. A logic signal having the logic 1 state as the higher voltage of the two states. The basic programmable opamp circuits. These are SC (switched capacitor) and CT (continuous time) blocks. These blocks can be interconnected to provide ADCs, DACs, multi-pole filters, gain stages, and much more. A device that changes an analog signal to a digital signal of corresponding magnitude. Typically, an ADC converts a voltage to a digital number. The digital-to-analog (DAC) converter performs the reverse operation. A series of software routines that comprise an interface between a computer application and lower level services and functions (for example, user modules and libraries). APIs serve as building blocks for programmers that create software applications. A signal whose data is acknowledged or acted upon immediately, irrespective of any clock signal. A stable voltage reference design that matches the positive temperature coefficient of VT with the negative temperature coefficient of VBE, to produce a zero temperature coefficient (ideally) reference. 1. The frequency range of a message or information processing system measured in hertz. 2. The width of the spectral region over which an amplifier (or absorber) has substantial gain (or loss); it is sometimes represented more specifically as, for example, full width at half maximum. 1. A systematic deviation of a value from a reference value. 2. The amount by which the average of a set of values departs from a reference value. 3. The electrical, mechanical, magnetic, or other force (field) applied to a device to establish a reference level to operate the device. 1. A functional unit that performs a single function, such as an oscillator. 2. A functional unit that may be configured to perform one of several functions, such as a digital PSoC block or an analog PSoC block. 1. A storage area for data that is used to compensate for a speed difference, when transferring data from one device to another. Usually refers to an area reserved for IO operations, into which data is read, or from which data is written. 2. A portion of memory set aside to store data, often before it is sent to an external device or as it is received from an external device. 3. An amplifier used to lower the output impedance of a system. 1. A named connection of nets. Bundling nets together in a bus makes it easier to route nets with similar routing patterns. 2. A set of signals performing a common function and carrying similar data. Typically represented using vector notation; for example, address[7:0]. 3. One or more conductors that serve as a common connection for a group of related devices. The device that generates a periodic signal with a fixed frequency and duty cycle. A clock is sometimes used to synchronize different logic blocks. An electronic circuit that produces an output voltage or current whenever two input levels simultaneously satisfy predetermined amplitude requirements. analog blocks analog-to-digital (ADC) Application programming interface (API) asynchronous bandgap reference bandwidth bias block buffer bus clock comparator Document Number: 38-12036 Rev. *E Page 26 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Glossary (continued) compiler configuration space crystal oscillator A program that translates a high level language, such as C, into machine language. In PSoC devices, the register space accessed when the XIO bit, in the CPU_F register, is set to ‘1’. An oscillator in which the frequency is controlled by a piezoelectric crystal. Typically a piezoelectric crystal is less sensitive to ambient temperature than other circuit components. cyclic redundancy A calculation used to detect errors in data communications, typically performed using a linear check (CRC) feedback shift register. Similar calculations may be used for a variety of other purposes such as data compression. data bus A bi-directional set of signals used by a computer to convey information from a memory location to the central processing unit and vice versa. More generally, a set of signals used to convey data between digital functions. A hardware and software system that allows you to analyze the operation of the system under development. A debugger usually allows the developer to step through the firmware one step at a time, set break points, and analyze memory. A period of time when neither of two or more signals are in their active state or in transition. The 8-bit logic blocks that can act as a counter, timer, serial receiver, serial transmitter, CRC generator, pseudo-random number generator, or SPI. A device that changes a digital signal to an analog signal of corresponding magnitude. The analogto-digital (ADC) converter performs the reverse operation. The relationship of a clock period high time to its low time, expressed as a percent. Duplicates (provides an emulation of) the functions of one system with a different system, so that the second system appears to behave like the first system. An active high signal that is driven into the PSoC device. It causes all operation of the CPU and blocks to stop and return to a pre-defined state. An electrically programmable and erasable, non-volatile technology that provides you the programmability and data storage of EPROMs, plus in-system erasability. Non-volatile means that the data is retained when power is OFF. The smallest amount of Flash ROM space that may be programmed at one time and the smallest amount of Flash space that may be protected. A Flash block holds 64 bytes. The number of cycles or events per unit of time, for a periodic function. The ratio of output current, voltage, or power to input current, voltage, or power, respectively. Gain is usually expressed in dB. A two-wire serial computer bus by Philips Semiconductors (now NXP Semiconductors). I2C is an Inter-Integrated Circuit. It is used to connect low-speed peripherals in an embedded system. The original system was created in the early 1980s as a battery control interface, but it was later used as a simple internal bus system for building control electronics. I2C uses only two bi-directional pins, clock and data, both running at +5V and pulled high with resistors. The bus operates at 100 kbits/second in standard mode and 400 kbits/second in fast mode. debugger dead band digital blocks digital-to-analog (DAC) duty cycle emulator External Reset (XRES) Flash Flash block frequency gain I2C Document Number: 38-12036 Rev. *E Page 27 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Glossary (continued) ICE The in-circuit emulator that allows you to test the project in a hardware environment, while viewing the debugging device activity in a software environment (PSoC Designer). input/output (I/O) A device that introduces data into or extracts data from a system. interrupt A suspension of a process, such as the execution of a computer program, caused by an event external to that process, and performed in such a way that the process can be resumed. A block of code that normal code execution is diverted to when the M8C receives a hardware interrupt. Many interrupt sources may each exist with its own priority and individual ISR code block. Each ISR code block ends with the RETI instruction, returning the device to the point in the program where it left normal program execution. 1. A misplacement of the timing of a transition from its ideal position. A typical form of corruption that occurs on serial data streams. 2. The abrupt and unwanted variations of one or more signal characteristics, such as the interval between successive pulses, the amplitude of successive cycles, or the frequency or phase of successive cycles. interrupt service routine (ISR) jitter low-voltage detect A circuit that senses Vdd and provides an interrupt to the system when Vdd falls below a (LVD) selected threshold. M8C An 8-bit Harvard-architecture microprocessor. The microprocessor coordinates all activity inside a PSoC by interfacing to the Flash, SRAM, and register space. A device that controls the timing for data exchanges between two devices. Or when devices are cascaded in width, the master device is the one that controls the timing for data exchanges between the cascaded devices and an external interface. The controlled device is called the slave device. An integrated circuit chip that is designed primarily for control systems and products. In addition to a CPU, a microcontroller typically includes memory, timing circuits, and IO circuitry. The reason for this is to permit the realization of a controller with a minimal quantity of chips, thus achieving maximal possible miniaturization. This in turn, reduces the volume and the cost of the controller. The microcontroller is normally not used for general-purpose computation as is a microprocessor. The reference to a circuit containing both analog and digital techniques and components. A device that imposes a signal on a carrier. 1. A disturbance that affects a signal and that may distort the information carried by the signal. 2. The random variations of one or more characteristics of any entity such as voltage, current, or data. A circuit that may be crystal controlled and is used to generate a clock frequency. A technique for testing transmitting data. Typically, a binary digit is added to the data to make the sum of all the digits of the binary data either always even (even parity) or always odd (odd parity). An electronic circuit that controls an oscillator so that it maintains a constant phase angle relative to a reference signal. The pin number assignment: the relation between the logical inputs and outputs of the PSoC device and their physical counterparts in the printed circuit board (PCB) package. Pinouts involve pin numbers as a link between schematic and PCB design (both being computer generated files) and may also involve pin names. Page 28 of 32 master device microcontroller mixed-signal modulator noise oscillator parity Phase-locked loop (PLL) pinouts Document Number: 38-12036 Rev. *E [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Glossary (continued) port Power on reset (POR) PSoC® A group of pins, usually eight. A circuit that forces the PSoC device to reset when the voltage is below a pre-set level. This is one type of hardware reset. Cypress Semiconductor’s PSoC® is a registered trademark and Programmable System-onChip™ is a trademark of Cypress. PSoC Designer™ The software for Cypress’ Programmable System-on-Chip technology. pulse width An output in the form of duty cycle which varies as a function of the applied measurand modulator (PWM) RAM An acronym for random access memory. A data-storage device from which data can be read out and new data can be written in. A storage device with a specific capacity, such as a bit or byte. A means of bringing a system back to a know state. See hardware reset and software reset. An acronym for read only memory. A data-storage device from which data can be read out, but new data cannot be written in. 1. Pertaining to a process in which all events occur one after the other. 2. Pertaining to the sequential or consecutive occurrence of two or more related activities in a single device or channel. The time it takes for an output signal or value to stabilize after the input has changed from one value to another. A memory storage device that sequentially shifts a word either left or right to output a stream of serial data. A device that allows another device to control the timing for data exchanges between two devices. Or when devices are cascaded in width, the slave device is the one that allows another device to control the timing of data exchanges between the cascaded devices and an external interface. The controlling device is called the master device. An acronym for static random access memory. A memory device where you can store and retrieve data at a high rate of speed. The term static is used because, after a value is loaded into an SRAM cell, it remains unchanged until it is explicitly altered or until power is removed from the device. An acronym for supervisory read only memory. The SROM holds code that is used to boot the device, calibrate circuitry, and perform Flash operations. The functions of the SROM may be accessed in normal user code, operating from Flash. A signal following a character or block that prepares the receiving device to receive the next character or block. 1. A signal whose data is not acknowledged or acted upon until the next active edge of a clock signal. 2. A system whose operation is synchronized by a clock signal. register reset ROM serial settling time shift register slave device SRAM SROM stop bit synchronous Document Number: 38-12036 Rev. *E Page 29 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Glossary (continued) tri-state A function whose output can adopt three states: 0, 1, and Z (high-impedance). The function does not drive any value in the Z state and, in many respects, may be considered to be disconnected from the rest of the circuit, allowing another output to drive the same net. A UART or universal asynchronous receiver-transmitter translates between parallel bits of data and serial bits. Pre-build, pre-tested hardware/firmware peripheral functions that take care of managing and configuring the lower level Analog and Digital PSoC Blocks. User Modules also provide high level API (Application Programming Interface) for the peripheral function. The bank 0 space of the register map. The registers in this bank are more likely to be modified during normal program execution and not just during initialization. Registers in bank 1 are most likely to be modified only during the initialization phase of the program. A name for a power net meaning "voltage drain." The most positive power supply signal. Usually 5 V or 3.3 V. A name for a power net meaning "voltage source." The most negative power supply signal. A timer that must be serviced periodically. If it is not serviced, the CPU resets after a specified period of time. UART user modules user space VDD VSS watchdog timer Document Number: 38-12036 Rev. *E Page 30 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Document History Page Document Title: CY8C9520A, CY8C9540A, CY8C9560A, 20, 40, and 60 Bit I/O Expander with EEPROM Document Number: 38-12036 Revision ECN No. ** *A *B 346754 392484 Orig. of Change HMT HMT Submission Date See ECN See ECN See ECN New silicon, document. Correct pin 79 on the TQFP. Add AC PWM Output Jitter spec. table. Upgrade to CY Perform logo and update zip code and trademarks. Update typical and recommended Storage Temperature per industrial specs. Update copyright and trademarks. Add Watchdog timer details. Add “A” to existing part numbers to indicate new firmware. Fix errors. Implement CY template. Added Contents. Updated Overview. Updated Pin 11 description in Figure 2 on page 5. Modified Note 3. Added IOH and IOL specifications in DC GPIO Specifications. Removed “Output Jitter” from AC PWM Specifications section on page 18. Added F24MHzPWM, F32kHzPWM, and F93.5kHzPWM specifications in Table 27. Added Table 29. Updated Cypress website links Added TBAKETEMP and TBAKETIME parameters Updated package diagrams Added text “When the part is held in reset all In and Out pins are held at their default High-Z State” to section “External Reset Pin (XRES)” on page 9. Added DC I2C Specifications table. Updated Units of Measure, Acronyms, Glossary, and References sections. Updated solder reflow specifications. No specific changes made to I2C Timing Diagram. It has been updated for clearer understanding. Description of Change 1336984 HMT/AESA *C 2843174 YARA 01/08/2010 *D 2903402 NJF 04/01/2010 *E 3110285 NJF 12/14/10 Document Number: 38-12036 Rev. *E Page 31 of 32 [+] Feedback CY8C9520A CY8C9540A, CY8C9560A Sales, Solutions, and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations. Products Automotive Clocks & Buffers Interface Lighting & Power Control Memory Optical & Image Sensing PSoC Touch Sensing USB Controllers Wireless/RF cypress.com/go/automotive cypress.com/go/clocks cypress.com/go/interface cypress.com/go/powerpsoc cypress.com/go/plc cypress.com/go/memory cypress.com/go/image cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB cypress.com/go/wireless PSoC Solutions psoc.cypress.com/solutions PSoC 1 | PSoC 3 | PSoC 5 © Cypress Semiconductor Corporation, 2007-2010. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress. Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. Document Number: 38-12036 Rev. *E Revised December 14, 2010 Page 32 of 32 PSoC Designer™ and Programmable System-on-Chip™ are trademarks and PSoC® and CapSense® are registered trademarks of Cypress Semiconductor Corporation. Purchase of I2C components from Cypress or one of its sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. As from October 1st, 2006 Philips Semiconductors has a new trade name - NXP Semiconductors. All products and company names mentioned in this document may be the trademarks of their respective holders. [+] Feedback