USB2534I-1080AENTR

USB2534 USB 2.0 Hi-Speed 4-Port Hub Controller Highlights Additional Features • Hub Controller IC with 4 downstream ports • USB-IF Battery Charger revision 1.2 support on up & downstream ports (DCP, CDP, SDP)  • Battery charging support for Apple devices • FlexConnect: Downstream port 1 able to swap with upstream port, allowing host capable devices to control other devices on the hub • USB to I2C bridge endpoint support • USB Link Power Management (LPM) support • SUSPEND pin for remote wakeup indication to host • Vendor Specific Messaging (VSM) support • Enhanced OEM configuration options available through a single serial I2C EEPROM, OTP, or SMBus Device Port • 36-pin (6x6mm) SQFN, RoHS compliant package • Footprint compatible with USB2514B • MultiTRAK™ - Dedicated Transaction Translator per port • PortMap - Configurable port mapping and disable sequencing • PortSwap - Configurable differential intra-pair signal swapping • PHYBoost™ - Programmable USB transceiver drive strength for recovering signal integrity • VariSense™ - Programmable USB receiver sensitivity • Low power operation • Full Power Management with individual or ganged power control of each downstream port • Built-in Self-Powered or Bus-Powered internal default settings provide flexibility in the quantity of USB expansion ports utilized without redesign • Supports “Quad Page” configuration OTP flash - Four consecutive 200 byte configuration pages • Fully integrated USB termination and Pull-up/Pulldown resistors • On-chip Power On Reset (POR) • Internal 3.3V and 1.2V voltage regulators • On Board 24MHz Crystal Driver, Resonator, or External 24MHz clock input • Environmental - Commercial temperature range support (0ºC to 70ºC) - Industrial temperature range support (-40ºC to 85ºC) Target Applications • • • • • • • • • LCD monitors and TVs Multi-function USB peripherals PC mother boards Set-top boxes, DVD players, DVR/PVR Printers and scanners PC media drive bay Portable hub boxes Mobile PC docking Embedded systems  2012 - 2021 Microchip Technology Inc. DS00001713D-page 1 USB2534 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors@microchip.com. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: http://www.microchip.com You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page. The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000). 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DS00001713D-page 2  2012 - 2021 Microchip Technology Inc. USB2534 Table of Contents 1.0 Introduction ..................................................................................................................................................................................... 4 2.0 Acronyms and Definitions ............................................................................................................................................................... 6 3.0 Pin Descriptions .............................................................................................................................................................................. 7 4.0 Power Connections ....................................................................................................................................................................... 17 5.0 Modes of Operation ...................................................................................................................................................................... 18 6.0 Device Configuration ..................................................................................................................................................................... 22 7.0 Device Interfaces .......................................................................................................................................................................... 26 8.0 Functional Descriptions ................................................................................................................................................................. 28 9.0 Operational Characteristics ........................................................................................................................................................... 34 10.0 Package Outline ................................................................................................................................................................................................... 40 Appendix A: Data sheet Revision History ........................................................................................................................................... 41 The Microchip Web Site ...................................................................................................................................................................... 42 Customer Change Notification Service ............................................................................................................................................... 42 Customer Support ............................................................................................................................................................................... 42 Product Identification System ............................................................................................................................................................. 43  2012 - 2021 Microchip Technology Inc. DS00001713D-page 3 USB2534 1.0 INTRODUCTION The USB2534 is a low-power, OEM configurable, MTT (Multi-Transaction Translator) USB 2.0 hub controller with 4 downstream ports and advanced features for embedded USB applications. The USB2534 is fully compliant with the USB 2.0 Specification, USB 2.0 Link Power Management Addendum and will attach to an upstream port as a Full-Speed hub or as a Full-/Hi-Speed hub. The 4-port hub supports Low-Speed, Full-Speed, and Hi-Speed (if operating as a HiSpeed hub) downstream devices on all of the enabled downstream ports. The USB2534 has been specifically optimized for embedded systems where high performance, and minimal BOM costs are critical design requirements. Standby mode power has been minimized and reference clock inputs can be aligned to the customer’s specific application. Additionally, all required resistors on the USB ports are integrated into the hub, including all series termination and pull-up/pull-down resistors on the D+ and D– pins. The USB2534 supports both upstream battery charger detection and downstream battery charging. The USB2534 integrated battery charger detection circuitry supports the USB-IF Battery Charging (BC1.2) detection method and most Apple devices. These circuits are used to detect the attachment and type of a USB charger and provide an interrupt output to indicate charger information is available to be read from the device’s status registers via the serial interface. The USB2534 provides the battery charging handshake and supports the following USB-IF BC1.2 charging profiles: • • • • DCP: Dedicated Charging Port (Power brick with no data) CDP: Charging Downstream Port (1.5A with data) SDP: Standard Downstream Port (0.5A with data) Custom profiles loaded via SMBus or OTP The USB2534 provides an additional USB endpoint dedicated for use as a USB to I2C interface, allowing external circuits or devices to be monitored, controlled, or configured via the USB interface. Additionally, the USB2534 includes many powerful and unique features such as: FlexConnect, which provides flexible connectivity options. The USB2534’s downstream port 1 can be swapped with the upstream port (port 0), allowing host-capable devices connected to port 1 to control other devices on the hub. FlexConnect can be enabled in two ways, via register control bits or a physical input control pin. as summarized in Table 1-1. If the physical control pin method is desired, the USB2534PF device type must be utilized. TABLE 1-1: FLEXCONNECT OPTIONS Device Type USB2534 USB2534PF Note 1-1 FlexConnect Control Method SMBus control through register settings Direct physical pin control (Note 1-1) SMBus control is possible with USB2534PF devices, but strongly discouraged. See Section 8.2.2, Pin Control (USB2534PF Devices) for additional details. MultiTRAK™ Technology, which utilizes a dedicated Transaction Translator (TT) per port to maintain consistent fullspeed data throughput regardless of the number of active downstream connections. MultiTRAKTM outperforms conventional USB 2.0 hubs with a single TT in USB full-speed data transfers. PortMap, which provides flexible port mapping and disable sequences. The downstream ports of a USB2534 hub can be reordered or disabled in any sequence to support multiple platform designs with minimum effort. For any port that is disabled, the USB2534 hub controllers automatically reorder the remaining ports to match the USB host controller’s port numbering scheme. PortSwap, which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors to avoid uneven trace length or crossing of the USB differential signals on the PCB. PHYBoost, which provides programmable levels of Hi-Speed USB signal drive strength in the downstream port transceivers. PHYBoost attempts to restore USB signal integrity in a compromised system environment. The graphic on the right shows an example of Hi-Speed USB eye diagrams before and after PHYBoost signal integrity restoration. VariSense, which controls the USB receiver sensitivity enabling programmable levels of USB signal receive sensitivity. This capability allows operation in a sub-optimal system environment, such as when a captive USB cable is used. The USB2534 is available in commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature range versions. DS00001713D-page 4  2012 - 2021 Microchip Technology Inc. USB2534 1.1 Block Diagram Figure 1-1 details the internal block diagram of the USB2534. FIGURE 1-1: RESET_N SYSTEM BLOCK DIAGRAM Up or Downstream USB VDDA33 VDDA33 To I2C Master/Slave VDDA33 SDA SCL VDDCR12 (USB2534PF Only) Serial Interface 1.2V Reg 3.3V Reg Flex PHY FLEX_IN SIE Controller Repeater TT #1 TT #2 TT #3 TT #4 TT #5 Routing & Port Re-Ordering Logic Bridge UDC 20 2KB DP SRAM 256B IRAM Swap PHY PHY PHY USB USB USB Port Power OCS 8051 Controller GPIO GPIO PHY 2KB OTP Down or Upstream Port Controller 4KB SRAM 32KB ROM USB Downstream Downstream Downstream  2012 - 2021 Microchip Technology Inc. DS00001713D-page 5 USB2534 2.0 ACRONYMS AND DEFINITIONS 2.1 Acronyms EOP: End of Packet EP: Endpoint FS: Full-Speed GPIO: General Purpose I/O (that is input/output to/from the device) HS: Hi-Speed HSOS: High Speed Over Sampling I2C: Inter-Integrated Circuit LS: Low-Speed OTP: One Time Programmable PCB: Printed Circuit Board PCS: Physical Coding Sublayer PHY: Physical Layer SMBus: System Management Bus UUID: Universally Unique IDentification 2.2 Reference Documents 1. 2. 3. 4. 5. UNICODE UTF-16LE For String Descriptors USB Engineering Change Notice, December 29th, 2004, http:// www.usb.org Universal Serial Bus Specification, Revision 2.0, April 27th, 2000, http://www.usb.org Battery Charging Specification, Revision 1.2, Dec. 07, 2010, http://www.usb.org I2C-Bus Specification, Version 1.1, http://www.nxp.com System Management Bus Specification, Version 1.0, http://smbus.org/specs DS00001713D-page 6  2012 - 2021 Microchip Technology Inc. USB2534 PIN DESCRIPTIONS VBUS_DET RESET_N HS_IND/CFG_SEL1 SCL/SMBCLK/CFG_SEL0 VDD33 SDA/SMBDATA/NON_REM1 UART_TX/OCS4_N PRTPWR4/PRTCTL4/BC_EN4 UART_RX/OCS3_N 25 24 23 22 21 20 19 36-SQFN PIN ASSIGNMENTS 26 FIGURE 3-1: 27 3.0 SUSP_IND/LOCAL_PWR/NON_REM0 28 18 PRTPWR3/PRTCTL3/BC_EN3 VDDA33 29 17 OCS2_N FLEX_USBUP_DM 30 16 PRTPWR2/PRTCTL2/BC_EN2 FLEX_USBUP_DP 31 15 VDD33 14 VDDCR12  2012 - 2021 Microchip Technology Inc. 5 6 7 8 9 NC USBDN3_DM/PRT_DIS_M3 USBDN3_DP/PRT_DIS_P3 USBDN4_DM/PRT_DIS_M4 USBDN4_DP/PRT_DIS_P4 36 4 VDDA33 Ground Pad (must be connected to VSS) 3 35 USBDN2_DP/PRT_DIS_P2 RBIAS USBDN2_DM/PRT_DIS_M2 34 2 NC 1 33 SWAP_USBDN1_DP/PRT_DIS_P1 32 SWAP_USBDN1_DM/PRT_DIS_M1 XTAL2 XTAL1/REFCLK USB2534 (Top View) 13 OCS1_N 12 PRTPWR1/PRTCTL1/BC_EN1 11 LED0/FLEX_IN 10 VDDA33 ** * * LED0 for USB253 4, FLEX_IN for USB253 4PF ** Second op tion for FLEX_IN pin assignment, ena bled th rough configuration (USB253 4PF only) DS00001713D-page 7 USB2534 3.1 Pin Descriptions This section provides a detailed description of each pin. The signals are arranged in functional groups according to their associated interface. The “_N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage level. For example, RESET_N indicates that the reset signal is active low. When “_N” is not present after the signal name, the signal is asserted when at the high voltage level. The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a signal is active, independent of whether that level is represented by a high or low voltage. The term negate, or negation, indicates that a signal is inactive. Note: The buffer type for each signal is indicated in the BUFFER TYPE column of Table 3-1. A description of the buffer types is provided in Section 3.3. Note: Compatibility with the UCS100x family of USB port power controllers requires the UCS100x be connected on Port 1 of the USB2534. Additionally, both PRTPWR1 and OCS1_N must be pulled high at Power-On Reset (POR). TABLE 3-1: PIN DESCRIPTIONS Buffer Type Num Pins Name Symbol Description FLEX_USBUP_DP AIO 1 Upstream USB D+ (Flex Port 0) Upstream USB Port 0 D+ data signal. Note: The upstream Port 0 signals can be optionally swapped with the downstream Port 1 signals. FLEX_USBUP_DM AIO 1 Upstream USB D(Flex Port 0) Upstream USB Port 0 D- data signal. Note: The upstream Port 0 signals can be optionally swapped with the downstream Port 1 signals. Downstream USB D+ (Swap Port 1) SWAP_USBDN1_DP AIO Downstream USB Port 1 D+ data signal. Note: The downstream Port 1 signals can be optionally swapped with the upstream Port 0 signals. Port 1 D+ Disable Configuration Strap PRT_DIS_P1 IS USB/HSIC INTERFACES 1 This strap is used in conjunction with PRT_DIS_M1 to disable USB Port 1. 0 = Port 1 D+ Enabled 1 = Port 1 D+ Disabled Note: Both PRT_DIS_P1 and PRT_DIS_M1 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. DS00001713D-page 8  2012 - 2021 Microchip Technology Inc. USB2534 TABLE 3-1: Num Pins 1 PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type Downstream USB D(Swap Port 1) SWAP_USBDN1_DM AIO Downstream USB Port 1 D- data signal. Note: The downstream Port 1 signals can be optionally swapped with the upstream Port 0 signals. Port 1 DDisable Configuration Strap PRT_DIS_M1 IS This strap is used in conjunction with PRT_DIS_P1 to disable USB Port 1. Description 0 = Port 1 D- Enabled 1 = Port 1 D- Disabled Note: Both PRT_DIS_P1 and PRT_DIS_M1 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. 1 Downstream USB D+ (Port 2) USBDN2_DP AIO Port 2 D+ Disable Configuration Strap PRT_DIS_P2 IS Downstream USB Port 2 D+ data signal. This strap is used in conjunction with PRT_DIS_M2 to disable USB Port 2. 0 = Port 2 D+ Enabled 1 = Port 2 D+ Disabled Note: Both PRT_DIS_P2 and PRT_DIS_M2 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. 1 Downstream USB D(Port 2) USBDN2_DM AIO Port 2 DDisable Configuration Strap PRT_DIS_M2 IS Downstream USB Port 2 D- data signal. This strap is used in conjunction with PRT_DIS_P2 to disable USB Port 2. 0 = Port 2 D- Enabled 1 = Port 2 D- Disabled Note: Both PRT_DIS_P2 and PRT_DIS_M2 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. 1 Downstream USB D+ (Port 3) USBDN3_DP AIO Port 3 D+ Disable Configuration Strap PRT_DIS_P3 IS Downstream USB Port 3 D+ data signal. This strap is used in conjunction with PRT_DIS_M3 to disable USB Port 3. 0 = Port 3 D+ Enabled 1 = Port 3 D+ Disabled Note: Both PRT_DIS_P3 and PRT_DIS_M3 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps.  2012 - 2021 Microchip Technology Inc. DS00001713D-page 9 USB2534 TABLE 3-1: Num Pins 1 PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type Downstream USB D(Port 3) USBDN3_DM AIO Port 3 DDisable Configuration Strap PRT_DIS_M3 IS Description Downstream USB Port 3 D- data signal. This strap is used in conjunction with PRT_DIS_P3 to disable USB Port 3. 0 = Port 3 D- Enabled 1 = Port 3 D- Disabled Note: Both PRT_DIS_P3 and PRT_DIS_M3 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. 1 Downstream USB D+ (Port 4) USBDN4_DP AIO Port 4 D+ Disable Configuration Strap PRT_DIS_P4 IS Downstream USB Port 4 D+ data signal. This strap is used in conjunction with PRT_DIS_M4 to disable USB Port 4. 0 = Port 4 D+ Enabled 1 = Port 4 D+ Disabled Note: Both PRT_DIS_P4 and PRT_DIS_M4 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. 1 Downstream USB D(Port 4) USBDN4_DM AIO Port 4 DDisable Configuration Strap PRT_DIS_M4 IS Downstream USB Port 4 D- data signal. This strap is used in conjunction with PRT_DIS_P4 to disable USB Port 4. 0 = Port 4 D- Enabled 1 = Port 4 D- Disabled Note: Both PRT_DIS_P4 and PRT_DIS_M4 must be tied to VDD33 at reset to disable the associated port. See Note 3-3 for more information on configuration straps. I2C Serial Clock Input 1 I2C/SMBUS INTERFACE SCL I_SMB I2C serial clock input SMBus Clock SMBCLK I_SMB SMBus serial clock input Configuration Select 0 Configuration Strap CFG_SEL0 I_SMB This strap is used in conjunction with CFG_SEL1 to set the hub configuration method. Refer to Section 6.3.2, "Configuration Select (CFG_SEL[1:0])," on page 25 for additional information. See Note 3-3 for more information on configuration straps. DS00001713D-page 10  2012 - 2021 Microchip Technology Inc. USB2534 TABLE 3-1: Num Pins 1 PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type I2C Serial Data SDA IS/OD8 I2C bidirectional serial data SMBus Serial Data SMBDATA IS/OD8 SMBus bidirectional serial data NonRemovable Device 1 Configuration Strap NON_REM1 (Note 3-2) IS Description This strap is used in conjunction with NON_REM0 to configure the downstream ports as nonremovable devices. Refer to Section 6.3.1, "NonRemovable Device (NON_REM[1:0])," on page 24 for additional information. See Note 3-3 for more information on configuration straps. MISC. 1 Port 1 OverCurrent Sense Input OCS1_N IS (PU) This active-low signal is input from an external current monitor to indicate an over-current condition on USB Port 1. 1 Port 2 OverCurrent Sense Input OCS2_N IS (PU) This active-low signal is input from an external current monitor to indicate an over-current condition on USB Port 2. UART Receive Input UART_RX IS Port 3 OverCurrent Sense Input OCS3_N IS (PU) UART Transmit Output UART_TX O8 Port 4 OverCurrent Sense Input OCS4_N IS (PU) System Reset Input RESET_N I_RST Crystal Input XTAL1 ICLK External 24 MHz crystal input 1 Reference Clock Input REFCLK ICLK Reference clock input. The device may be alternatively driven by a single-ended clock oscillator. When this method is used, XTAL2 should be left unconnected. 1 Crystal Output XTAL2 OCLK 1 External USB Transceiver Bias Resistor RBIAS AI A 12.0k (+/- 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. LED 0 Output LED0 O8 General purpose LED 0 output that is configurable to blink or “breathe” at various rates. Note: USB2534 only. 1 1 1 1 Internal UART receive input Note: This is a 3.3V signal. For RS232 operation, an external 12V translator is required. This active-low signal is input from an external current monitor to indicate an over-current condition on USB Port 3. Internal UART transmit output Note: This is a 3.3V signal. For RS232 operation, an external 12V driver is required. This active-low signal is input from an external current monitor to indicate an over-current condition on USB Port 4. This active-low signal allows external hardware to reset the device. Note: The active-low pulse must be at least 5us wide. Refer to Section 8.3.2, "External Chip Reset (RESET_N)," on page 31 for additional information. External 24 MHz crystal output Note:  2012 - 2021 Microchip Technology Inc. LED0 must be enabled via the Protouch configuration tool. DS00001713D-page 11 USB2534 TABLE 3-1: Num Pins PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type Flex In FLEX_IN IS 1 Description Controls the state of FlexConnect: 0 = Port 0 is the upstream facing port (Port 1 is a downstream facing port) 1 = Port 1 is the upstream facing port (Port 0 becomes downstream facing port 1) Note: USB2534PF only. Note: Detect Upstream VBUS Power VBUS_DET IS Port 1 may be optionally disabled in hub configuration if Port 1 / Port 0 shall never operate as a downstream facing port within the application. Detects state of upstream bus power. When designing a detachable hub, this pin must be connected to the VBUS power pin of the upstream USB port through a resistor divider (50k by 100k) to provide 3.3V. For self-powered applications with a permanently attached host, this pin must be connected to either 3.3V or 5.0V through a resistor divider to provide 3.3V. 1 In embedded applications, VBUS_DET may be controlled (toggled) when the host desires to renegotiate a connection without requiring a full reset of the device. Remote Wakeup Indicator SUSP_IND OD8 Configurable sideband signal used to indicate Suspend status (default) or Remote Wakeup events to the Host. Suspend Indicator (default configuration): 0 = Unconfigured, or configured and in USB suspend mode 1 = Device is configured and is active (i.e., not in suspend) For Remote Wakeup Indicator mode: Refer to Section 8.5, "Remote Wakeup Indicator (SUSP_IND)," on page 32. 1 Refer to Section 6.3.1, "Non-Removable Device (NON_REM[1:0])," on page 24 for information on LED polarity when using this signal. Local Power Detect LOCAL_PWR IS Detects the availability of a local self-power source. 0 = Self/local power source is NOT available. (i.e., device must obtain all power from upstream USB VBUS) 1 = Self/local power source is available See Note 3-1 for more information on this pin. NonRemovable Device 0 Configuration Strap NON_REM0 (Note 3-2) IS This strap is used in conjunction with NON_REM1 to configure the downstream ports as nonremovable devices. Refer to Section 6.3.1, "NonRemovable Device (NON_REM[1:0])," on page 24 for additional information. See Note 3-3 for more information on configuration straps. DS00001713D-page 12  2012 - 2021 Microchip Technology Inc. USB2534 TABLE 3-1: Num Pins PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type High Speed Indicator HS_IND O8 Description Indicates a high speed connection on the upstream port. The active state of the LED will be determined as follows: If CFG_SEL1 = 0, HS_IND is active high. If CFG_SEL1 = 1, HS_IND is active low. 1 Asserted = hub is connected at high speed Negated = Hub is connected at full speed Configuration Select 1 Configuration Strap CFG_SEL1 IS This strap is used in conjunction with CFG_SEL0 to set the hub configuration method. Refer to Section 6.3.2, "Configuration Select (CFG_SEL[1:0])," on page 25 for additional information. See Note 3-3 for more information on configuration straps. Port 1 Power Output PRTPWR1 O8 Enables power to a downstream USB device attached to Port 1. 0 = Power disabled on downstream Port 1 1 = Power enabled on downstream Port 1 1 Port 1 Control PRTCTL1 OD8/IS (PU) When configured as PRTCTL1, this pin functions as both the Port 1 power enable output (PRTPWR1) and the Port 1 over-current sense input (OCS1_N). Refer to the PRTPWR1 and OCS1_N descriptions for additional information. Port 1 Battery Charging Configuration Strap BC_EN1 IS This strap is used to indicate support of the battery charging protocol on Port 1. Enabling battery charging support allows a device on the port to draw currents per the USB battery charging specification. 0 = Battery charging is not supported on Port 1 1 = Battery charging is supported on Port 1 See Note 3-3 for more information on configuration straps. Port 2 Power Output PRTPWR2 O8 Enables power to a downstream USB device attached to Port 2. 0 = Power disabled on downstream Port 2 1 = Power enabled on downstream Port 2 1 Port 2 Control PRTCTL2 OD8/IS (PU) When configured as PRTCTL2, this pin functions as both the Port 2 power enable output (PRTPWR2) and the Port 2 over-current sense input (OCS2_N). Refer to the PRTPWR2 and OCS2_N descriptions for additional information. Port 2 Battery Charging Configuration Strap BC_EN2 IS This strap is used to indicate support of the battery charging protocol on Port 2. Enabling battery charging support allows a device on the port to draw currents per the USB battery charging specification. 0 = Battery charging is not supported on Port 2 1 = Battery charging is supported on Port 2 See Note 3-3 for more information on configuration straps.  2012 - 2021 Microchip Technology Inc. DS00001713D-page 13 USB2534 TABLE 3-1: Num Pins PIN DESCRIPTIONS (CONTINUED) Name Symbol Buffer Type Port 3 Power Output PRTPWR3 O8 Description Enables power to a downstream USB device attached to Port 3. 0 = Power disabled on downstream Port 3 1 = Power enabled on downstream Port 3 1 Port 3 Control PRTCTL3 OD8/IS (PU) When configured as PRTCTL3, this pin functions as both the Port 3 power enable output (PRTPWR3) and the Port 3 over-current sense input (OCS3_N). Refer to the PRTPWR3 and OCS3_N descriptions for additional information. Port 3 Battery Charging Configuration Strap BC_EN3 IS This strap is used to indicate support of the battery charging protocol on Port 3. Enabling battery charging support allows a device on the port to draw currents per the USB battery charging specification. 0 = Battery charging is not supported on Port 3 1 = Battery charging is supported on Port 3 See Note 3-3 for more information on configuration straps. Port 4 Power Output PRTPWR4 O8 Enables power to a downstream USB device attached to Port 4. 0 = Power disabled on downstream Port 4 1 = Power enabled on downstream Port 4 1 Port 4 Control PRTCTL4 OD8/IS (PU) When configured as PRTCTL4, this pin functions as both the Port 4 power enable output (PRTPWR4) and the Port 4 over-current sense input (OCS4_N). Refer to the PRTPWR4 and OCS4_N descriptions for additional information. Port 4 Battery Charging Configuration Strap BC_EN4 IS This strap is used to indicate support of the battery charging protocol on Port 4. Enabling battery charging support allows a device on the port to draw currents per the USB battery charging specification. 0 = Battery charging is not supported on Port 4 1 = Battery charging is supported on Port 4 See Note 3-3 for more information on configuration straps. 2 No Connect NC - These pins must be left floating for normal device operation. 3 +3.3V Analog Power Supply VDDA33 P +3.3V analog power supply. Refer to Section 4.0, "Power Connections," on page 17 for power connection information. VDD33 P 2 +3.3V Power Supply +3.3V power supply. These pins must be connected to VDDA33. Refer to Section 4.0, "Power Connections," on page 17 for power connection information. +1.2V Core Power Supply VDDCR12 P +1.2V core power supply. A 1.0 F (