4.1.1 WINC1500-XPRO Extension Header

The WINC1500-XPRO implements one Xplained Pro Standard Extension Header marked with EXT in the PCB silkscreen. This header makes it possible to connect the board to any Xplained Pro MCU board. The following table provides pin descriptions for the extension header. Among the interfaces of the wireless module, SPI is the only host interface; UART is for debug and I²C is for development debug. UART and I²C signals are accessed through debug connectors J103 and J104, respectively. So, UART_RXD and UART_TXD connections of the wireless module with the host can be separated by removing R117 and R118 to access them only at J103. To find the location of these resistors on the board, refer to WINC1500-XPRO Design Documentation. Similarly, the I2C_SDA and I2C_SCL connections of the wireless module with the host can be separated by removing R107 and R108, respectively; I²C connection in J100 can be used to control the crypto device by the host.

Table 4-1. WINC1500-XPRO Extension Header
Pin Number	Pin Name	Description
1	ID_DATA	Communication line to ID chip
2	GND	Ground
3	NC	—
4	NC	—
5	RESET_N	Active-low hard reset to the board
6	WAKE	Active-high host wake control signal to the wireless module
7	NC	—
8	NC	—
9	IRQN	Interrupt output from the wireless module to the host
10	CHIP_EN	Active-high module enable signal to wireless module from host
11	I2C_SDA	Data line for I²C interface
12	I2C_SCL	Clock line for I²C interface
13	UART_RX	Receive pin of target MCU UART interface
14	UART_TX	Transmit pin of target MCU UART interface
15	SPI_SSN	Active-low Client select signal of the SPI interface to wireless module from host
16	SPI_MOSI	Host out, Client in signal of target MCU SPI interface
17	SPI_MISO	Host in, Client out signal of target MCU SPI interface
18	SPI_SCK	Clock line of the SPI interface
19	GND	Ground
20	VCC_TARGET	Target +3.3V supply voltage from the host MCU board

Power Measurement Header

The current measurement header (J102) can be used to measure the total current consumed by the ATWINC15x0-MR210xB module using a voltmeter. To measure the total current consumption of the module, remove the jumper from J102 and connect a voltmeter across its pins. A 1Ω resistor available on-board across the jumper gives a 1:1 relationship between the voltage drop and current consumption.

Debug Connectors

The Debug UART Header (J103) is not mounted on the board. The following table provides connector and module pin descriptions. It is recommended that this connector be mounted for debug using this UART. A USB Hi-Speed-to-UART Cable like FTDI is needed to connect J103 with the PC to print the debug log. The following settings are recommended for setting up the serial port for the debug UART communication. To find the latest settings for the serial port setup, refer to Getting Started Guide for ATWINC1500 Wi-Fi using SAM D21 Xplained Pro.

Baud rate: 460800
Data: 8-bit
Parity: none
Stop: 1 bit
Flow control: none

Table 4-2. Debug UART Connector J103
Pin on UART Connector	Pin on ATWINC15x0-MR210xB module	Function
1	19	UART RX
2	14	UART TX
3	28	Ground

The Debug I²C Header (J104) is not mounted on the board. The following table provides connector and module pin descriptions. It is recommended that this I²C connector be mounted only for debug and testing. An I²C/SPI Host Adapter like Aardvark is needed to connect J104 with the PC.

Table 4-3. Debug I²C Connector J104
Pin on I²C connector	Pin on ATWINC15x0-MR210xB module	Function
1	2	I²C SCL
2	28	Ground
3	3	I²C SDA
4	—	Not Connected

The I²C and UART pins of the wireless module are also connected with the Extension port receptacle J101. The connector can be used for connecting an extension board or for debugging purposes. It is currently not mounted on the board.

Table 4-4. Extension Port / Debug Connector J101
Pin on Extension Port	Pin on ATWINC15x0-MR210xB module	Function
1	3	I²C_SDA
2	—	NC
3	2	I²C_SCL
4	19	UART_RXD
5	28	GND
6	14	UART_TXD
7	—	NC
8	28	GND
9	4	RESET_N
10	23 and 20	VCC_MODULE (+3.3V)