# Pin definitions
Source: [https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html](https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html)
This topic explains the pin assignments of the QCC748M. The figure and
table within this topic provide details on pinouts, pad attributes, and their
corresponding definitions.
## I/O parameter definitions
Source: [https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html](https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html)
The following table lists pad attributes and their descriptions, pad pull details, and
the pad voltage groupings used throughout this topic.
| Symbol | Description |
| --- | --- |
| ***Pin attribute*** | ***Pin attribute*** |
| AI | Analog input (does not include pad circuitry) |
| AO | Analog output (does not include pad circuitry) |
| DI | Digital input (CMOS) |
| DO | Digital output (CMOS) |
## Pin map
Source: [https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html](https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html)
A high-level view of the pin assignments is shown in the following figure. For more
information on package details and to create printed circuit board (PCB) footprint, see
[Mechanical information](https://docs.qualcomm.com/doc/80-78832-1/topic/mechanical-information.html).
Figure : QCC748M pin assignments
## Pin descriptions
Source: [https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html](https://docs.qualcomm.com/doc/80-78832-1/topic/pin-definitions.html)
The following table describes the pin functions, pin pull types, and pin voltages. It
also provides a mapping of pin numbers and pin names for all the pins on the device.
These include general pins, GPIO pins, and power pins.
Table : Pin descriptions
| Pin | Pin Name | Type | Power Domain | Description |
| :---: | :---: | :---: | :---: | --- |
| 23 | VDD33 | PWR | – | Power input (2.97~3.63V) |
| 13 | VDDIO1 | PWR | – | Host I/O voltage input GPIO0~15 |
| 36 | VDDIO2 | PWR | – | Host I/O voltage input GPIO20~34 |
| 22, 35, 44, 46 | GND | GND | GND | Ground |
| 45 | NC | – | – | NC |
| 25 | USB\_DP | AI/AO | – | USB Data Plus |
| 26 | USB\_DM | AI/AO | – | USB Data Minus |
| 24 | CHIP\_EN | DI | – | Chip power on |
| 1 | GPIO0 | DI/DO | VDDIO1 | General purpose I/O |
| 2 | GPIO1 | DI/DO | VDDIO1 | General purpose I/O |
| 3 | GPIO2 | DI/DO | VDDIO1 | General purpose I/O |
| 4 | GPIO3 | DI/DO | VDDIO1 | General purpose I/O |
| 5 | GPIO15 | DI/DO | VDDIO1 | General purpose I/O |
| 6 | GPIO14 | DI/DO | VDDIO1 | General purpose I/O |
| 7 | GPIO13 | DI/DO | VDDIO1 | General purpose I/O |
| 8 | GPIO12 | DI/DO | VDDIO1 | General purpose I/O |
| 9 | GPIO11 | DI/DO | VDDIO1 | General purpose I/O |
| 10 | GPIO10 | DI/DO | VDDIO1 | General purpose I/O |
| 11 | GPIO4 | DI/DO | VDDIO1 | General purpose I/O |
| 12 | GPIO5 | DI/DO | VDDIO1 | General purpose I/O |
| 14 | GPIO6 | DI/DO | VDDIO1 | General purpose I/O |
| 15 | GPIO7 | DI/DO | VDDIO1 | General purpose I/O |
| 16 | GPIO8 | DI/DO | VDDIO1 | General purpose I/O |
| 17 | GPIO9 | DI/DO | VDDIO1 | General purpose I/O |
| 18 | GPIO16 | DI/DO | VDD33 | General purpose I/O |
| 19 | GPIO17 | DI/DO | VDD33 | General purpose I/O |
| 20 | GPIO18 | DI/DO | VDD33 | General purpose I/O |
| 21 | GPIO19 | DI/DO | VDD33 | General purpose I/O |
| 27 | GPIO20 | DI/DO | VDDIO2 | General purpose I/O |
| 28 | GPIO21 | DI/DO | VDDIO2 | General purpose I/O |
| 29 | GPIO22 | DI/DO | VDDIO2 | General purpose I/O |
| 30 | GPIO23 | DI/DO | VDDIO2 | General purpose I/O |
| 31 | GPIO24 | DI/DO | VDDIO2 | General purpose I/O |
| 32 | GPIO25 | DI/DO | VDDIO2 | General purpose I/O |
| 33 | GPIO26 | DI/DO | VDDIO2 | General purpose I/O |
| 34 | GPIO33 | DI/DO | VDDIO2 | General purpose I/O |
| 37 | GPIO31 | DI/DO | VDDIO2 | General purpose I/O |
| 38 | GPIO34 | DI/DO | VDDIO2 | General purpose I/O |
| 39 | GPIO27 | DI/DO | VDDIO2 | General purpose I/O |
| 40 | GPIO29 | DI/DO | VDDIO2 | General purpose I/O |
| 41 | GPIO28 | DI/DO | VDDIO2 | General purpose I/O |
| 42 | GPIO32 | DI/DO | VDDIO2 | General purpose I/O |
| 43 | GPIO30 | DI/DO | VDDIO2 | General purpose I/O |
Table : GPIO pin mux
| GPIO | QSPI | SDIO | SDH | SPI | I2C
(0/1) | UART
(0/1) | I2S | PWM | CAN (ISO 11898) | ADC | DAC | EMAC | DVP | DBI | JTAG |
| :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
| GPIO0 | – | – | – | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH0P | TX/
RX | CH9 | – | – | CAM1\_VSYNC | – | TMS |
| GPIO1 | – | – | – | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH0N | TX/
RX | CH8 | – | – | CAM1\_HSYNC | – | TCK |
| GPIO2 | – | – | – | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH1P | TX/
RX | CH2 | – | – | – | – | TDO |
| GPIO3 | – | – | – | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH1N | TX/
RX | CH3 | – | – | CAM1\_DAT0 | – | TDI |
| GPIO10 | SCL | DAT2 | DAT1 | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH1P | TX/
RX | CH7 | – | – | CAM1\_DAT1 | B\_DB2/C\_SDA0 | TDO |
| GPIO11 | CS | DAT3 | DAT0 | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH1N | TX/
RX | – | – | – | CAM1\_DAT2 | B\_DB3/C\_DCn | TDI |
| GPIO12 | SDA0 | CMD | CLK | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH2P | TX/
RX | CH6 | – | – | CAM1\_DAT3 | B\_DB4/C\_SCL | TMS |
| GPIO13 | SDA1 | CLK | CMD | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH2N | TX/
RX | CH5 | – | – | CAM1\_CLK | B\_DB5/C\_CSn | TCK |
| GPIO14 | SDA2 | DAT0 | DAT3 | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH3P | TX/
RX | CH4 | A\_PWM\_P | – | CAM1\_DAT4 | B\_DB6/C\_SDA0 | TDO |
| GPIO15 | SDA3 | DAT1 | DAT2 | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH3N | TX/
RX | – | A\_PWM\_N | – | CAM1\_DAT5 | B\_DB7/C\_DCn | TDI |
| GPIO16 | – | – | – | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH0P | TX/
RX | – | – | – | CAM1\_DAT6 | – | TMS |
| GPIO17 | – | – | – | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH0N | TX/
RX | – | – | – | CAM1\_DAT7 | – | TCK |
| GPIO18 | – | – | – | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH1P | TX/
RX | – | – | – | – | – | TDO |
| GPIO19 | – | – | – | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH1N | TX/
RX | CH1 | – | – | – | – | TDI |
| GPIO20 | – | – | – | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH2P | TX/
RX | CH0/ACH0 | – | – | – | – | TMS |
| GPIO21 | – | – | – | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH2N | TX/
RX | ACH1 | – | – | – | – | TCK |
| GPIO22 | – | – | – | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH3P | TX/
RX | ACH2 | A\_PWM\_P | – | – | – | TDO |
| GPIO23 | – | – | – | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH3N | TX/
RX | ACH3 | A\_PWM\_N | – | – | – | TDI |
| GPIO24 | – | – | – | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH0P | TX/
RX | – | – | – | CAM0\_DAT0 | – | TMS |
| GPIO25 | – | – | – | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH0N | TX/
RX | – | – | REF\_CLK | CAM0\_DAT1 | – | TCK |
| GPIO26 | – | – | – | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH1P | TX/
RX | – | – | TXD[0] | CAM0\_DAT2 | – | TDO |
| GPIO27 | – | – | – | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH1N | TX/
RX | CH10/ACH4 | A\_PWM\_N | TXD[1] | CAM0\_DAT3 | – | TDI |
| GPIO28 | – | – | – | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH2P | TX/
RX | CH11/ACH5 | A\_PWM\_P | RXD[0] | CAM0\_HSYNC | – | TMS |
| GPIO29 | – | – | – | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH2N | TX/
RX | ACH6 | – | RXD[1] | CAM0\_VSYNC | – | TCK |
| GPIO30 | – | – | – | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH3P | TX/
RX | ACH7 | – | RXERR | CAM0\_CLK | – | TDO |
| GPIO31 | – | – | – | MOSI | SDA | RTS/CTS/TX/RX | DO | CH3P/CH3N | TX/
RX | – | – | TX\_EN | CAM0\_DAT4 | – | TDI |
| GPIO32 | – | – | – | CS | SCL | RTS/CTS/TX/RX | BCLK | CH0P/CH0P | TX/
RX | – | – | RX\_DV | CAM0\_DAT5 | – | TMS |
| GPIO33 | – | – | – | CLK | SDA | RTS/CTS/TX/RX | FS | CH1P/CH0N | TX/
RX | – | – | MDC | CAM0\_DAT6 | – | TCK |
| GPIO34 | – | – | – | MISO | SCL | RTS/CTS/TX/RX | DI | CH2P/CH1P | TX/
RX | – | – | MDIO | CAM0\_DAT7 | – | TDO |
Note: GPIO4–GPIO9 are dedicated to the QSPI
interface for the onboard module flash memory. These pins are fixed and can't be
reassigned to other peripheral functions even though they're brought out as module
pins.
Last Published: Apr 08, 2026
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