Pin Number
Function
Description
7
NC
Not connected
8
NC
Not connected
Table 4-6. J206 Stacking Connector
Pin Number
Function
Description
20
UART_RTS
Bluetooth
®
UART RTS output
21
UART_CTS
Bluetooth
®
UART CTS input
35
GND
Ground
36
GND
Ground
4.2
ATWILC3000 Shield Raspberry Pi Stacking Connector
The ATWILC3000 Shield contains a Raspberry Pi compatible 40-pin stacking connector used to connect
the board to a Raspberry Pi base board. This is also used for exposing the unused pins to the user. The
pinout definition for the Raspberry Pi connector is given in the following table.
Table 4-7. J207 Stacking Connector
Pin Number
Function
Description
1
VCC_INT_P3V3
3.3V power supply. Insert jumper cap on J300-1 and
J300-2 to use this power supply.
2
NC
Not connected
3
GPIO2/SUSPEND
GPIO signal
4
NC
Not connected
5
CHIP_EN
ATWILC3000 Chip enable is controlled by the host
MCU
6
GND
Ground
7
IRQN
Host interrupt request output
8
UART_RX
Bluetooth
®
UART receive
9
GND
Ground
10
UART_TX
Bluetooth
®
UART transmit
11
CTS
Bluetooth
®
UART CTS input
12
GEN1/RTC_CLK
By default, this pin is not connected. Mount R315 (0Ω)
to connect.
13
SDDATA3
SDIO Data 3. By default, this pin is not connected.
Mount R227 (0Ω) to connect.
14
GND
Ground
ATWILC3000
Hardware Specifications
©
2018 Microchip Technology Inc.
User Guide
DS50002769A-page 9