2.2 Pin Details of WILCS02 Module

This section provides details on pin diagrams and the pinout table of the WILCS02 Module.

Table 2-2. **WILCS02 Module Pinout Table**
Pin Number	Pin Name	Pin Type	Pin Description
1	NC	—	No connection
2	Reserved	I/O	Reserved pin Do not connect.
3	Reserved	I/O	Reserved pin Do not connect.
4	MCLR	I	Master Clear Reset Input (Active low)
5	PTA_WLAN_ACTIVE	O	PTA interface, WLAN Active indication output to Bluetooth® Coexistence device
6	PTA_BT_PRIO	I	PTA interface, Bluetooth Coexistence device priority indication input to WILCS02
7	Reserved	I/O	Reserved pin Do not connect.
8	NC	—	No connection.
9	GND	P	Ground
10	DFU_RX/STRAP1	I/O	Device Firmware Update, receive signal
10	DFU_RX/STRAP1	I/O	Host interface configuration, Strapping1 pin. Connect to a pulled-low resistor of 100K for the SDIO interface or a pulled-high resistor of 10K for the SPI.
11	Reserved⁽⁵⁾	—	Reserved pin Connect to an I/O pin (tri-stated) of a host device or to an external switch for future use.
12	GND	P	Ground
13	INTOUT	O	Interrupt request (Active-low) from the Wi-Fi® module
14	SD_DATA3/UART1_TX⁽⁴⁾	I/O	SDIO, Data3 Connect to the SDIO data3 of the host device.
14	SD_DATA3/UART1_TX⁽⁴⁾	O	Used for external antenna calibration Connect this signal to a test point or a pin header.
15	SD_DATA2/SDI1	I/O	SDIO, Data2 Connect to the SDIO data2 of the host device.
15	SD_DATA2/SDI1	I	SPI1, Serial Data In Connect to Serial Data Out of the host device.
16	SD_DATA1/CS1	I/O	SDIO, Data1 Connect to the SDIO data1 of the host device.
16	SD_DATA1/CS1	I	SPI1, Chip Select (Active-low) Connect to the Chip Select of the host device.
17	SD_DATA0/SDO1	I/O	SDIO, Data0 Connect to the SDIO data0 of the host device.
17	SD_DATA0/SDO1	O	SPI1, Serial Data Out Connect to the Serial Data In of the host device.
18	SD_CMD/SCK1	I	SDIO, command Connect to the SDIO command of the host device.
18	SD_CMD/SCK1	I	SPI1, Serial Clock Connect to the SPI Clock of the host device.
19	SD_CLK/UART1_RX⁽⁴⁾	I	SDIO, Clock Connect to the SDIO clock of the host device.
19	SD_CLK/UART1_RX⁽⁴⁾	I	Used for external antenna calibration Connect this signal to a test point or a pin header.
20	VDD	P	VDD power supply (3.0-3.6V)
21	RTCC_OSC_IN/PTA_BT_ACTIVE⁽¹⁾⁽³⁾	I	32.768 KHz RTCC Oscillator input
21	RTCC_OSC_IN/PTA_BT_ACTIVE⁽¹⁾⁽³⁾	I	PTA interface, Bluetooth Coexistence device active indication input to WILCS02
22	RTCC_OSC_OUT⁽³⁾	O	32.768 KHz RTCC Oscillator output
23	VDDIO	P	I/O power supply (3.0-3.3V)
24	TP	P	Test point: 1.5V⁽²⁾
25	NC	—	No connection
26	DFU_TX/STRAP2	I/O	Device Firmware Update, transmit signal
26	DFU_TX/STRAP2	I/O	Host interface configuration, Strapping2 pin. Connect to a pulled-high resistor of 10K for future upgrades.
27	UART2_TX	I/O	UART2 transmit signal for the firmware log. UART setting: 460,800 baud, 8N1 and no flow control
28	GND	P	Ground
29	GND Paddle	P	Thermal ground paddle
Note: The WILCS02 Module can support either RTCC_OSC_IN or PTA_BT_ACTIVE functionality at a time, so, either the RTCC or PTA feature can be used. Do not connect any signal to source the voltage as it is for internal purposes only. Current firmware does not support the RTCC Oscillator function; it is recommended to have an option to mount the RTCC Oscillator in the design to upgrade with the future version of firmware releases. For more details, refer to the WILCS02 Module External Antenna Calibration Guide (DS50003751) Do not leave this pin unconnected. Follow as described in the Pin Description column for future upgrades.