3 Pinout and Package Information

This package contains an exposed paddle that must be connected to the system board ground. The ATWINC3400-MR210xA module pin assignment is shown in the following figure. This package contains an exposed paddle, Pin 37, PADDLE VSS, that must be connected to the system board ground.
Figure 3-1. ATWINC3400-MR210xA Module Pin Assignment

The following table provides the ATWINC3400-MR210xA module pin description.

Table 3-1. ATWINC3400-MR210xA Module Pin Description
Pin #Pin NamePin TypeDescription
1GNDGNDGround pin
2SPI_CFGDigital InputSerial Peripheral Interface pin, which must be tied to VDDIO
3NC—No connection
4NC—No connection
5NC—No connection
6NC—No connection
7RESETNDigital Input
  • Active-low hard Reset pin
  • When the Reset pin is asserted low, the module is in the Reset state. When the Reset pin is asserted high, the module functions normally
  • This pin must connect to a host output that is low by default on power-up. If the host output is tri-stated, add a 1 MOhm pull-down resistor to ensure a low level at power-up
8BT_TXDDigital I/O, Programmable pull up
  • Bluetooth UART transmit data output pin
  • Used only during debug for DTM interface. SPI is the data and control interface with the host Microcontroller
  • It is recommended to add a test point for this pin
9BT_RXDDigital I/O, Programmable pull up
  • Bluetooth UART receive data input pin
  • Used only during debug for the DTM interface. SPI is the data and control interface with the host Microcontroller
  • Adding a test point for this pin is recommended
10I2C_SDA_SDigital I/O, Programmable pull up
  • I2C Client data pin
  • Used only for test purposes. Adding a test point for this pin is recommended
11I2C_SCL_SDigital I/O, Programmable pull up
  • I2C Client clock pin
  • Used only for test purposes. Adding a test point for this pin is recommended
12VDDIOPowerDigital I/O power supply
13GNDGNDGround pin
14GPIO3Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
15GPIO4Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
16UART_TXDDigital I/O, Programmable pull up
  • Wi-Fi UART TxD output pin
  • Used only for debug development purposes. Adding a test point for this pin is recommended
17UART_RXDDigital I/O, Programmable pull up
  • Wi-Fi UART RxD input pin
  • Used only for debug development purposes. Adding a test point for this pin is recommended
18VBATPowerPower supply pin for DC/DC converter and PA
19CHIP_ENDigital Input
  • PMU enable pin
  • When the CHIP_EN pin is asserted high, the module is enabled. When the CHIP_EN pin is asserted low, the module is disabled or put into Power-Down mode
  • Connect to a host output that is low by default at power-up. If the host output is tri-stated, add a 1 MOhm pull-down resistor, if necessary, to ensure a low level at power-up
20RTC_CLKDigital I/O, Programmable pull up
  • RTC Clock input pin
  • This pin must connect to a 32.768 kHz clock source
21GNDGNDGround pin
22GPIO8Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
23SPI_SCKDigital I/O, Programmable pull upSPI clock pin
24SPI_MISODigital I/O, Programmable pull upSPI MISO (Host In Client Out) pin
25SPI_SSNDigital I/O, Programmable pull upActive-low SPI SSN (Client Select) pin
26SPI_MOSIDigital I/O, Programmable pull upSPI MOSI (Host Out Client In) pin
27GPIO7Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
28GNDGNDGround pin
29GPIO17Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
30GPIO18Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
31GPIO19Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
32GPIO20Digital I/O, Programmable pull upGeneral Purpose Input/Output pin(1)
33IRQNDigital output, Programmable pull up
  • ATWINC3400-MR210xA module host interrupt request output pin
  • This pin must connect to a host interrupt pin
34I2C_SCL_MDigital I/O, Programmable pull upI2C Host clock pin
35I2C_SDA_MDigital I/O, Programmable pull upI2C Host data pin
36GNDGNDGround pin
37PADDLE VSSGNDConnect to the system board ground
Note:
  1. Usage of the GPIO functionality is not supported by the firmware. The data sheet will be updated once the support for this feature is added.