Extension Headers

The BIST-XPRO implements two Xplained Pro Standard Extension Headers (see Xplained Pro Standard Extension Header) marked with J1 and J4 in silkscreen. This header makes it possible to connect the board to an Xplained Pro MCU and sensor boards. The pinout definition for the extension header scan be seen in the table below.

Table 1. BIST Xplained Pro Extension Header J1
Pin Number	Pin Name	Description
1	ID	Pin to communicate with the ID chip on an extension board
2	GND	Ground
3	ADC(+)	Analog-to-Digital Converter; alternatively, a pin for the positive terminal of a differential ADC
4	ADC(-)	Analog-to-Digital Converter; alternatively, a pin for the negative terminal of a differential ADC
5	GPIO1	General purpose I/O pin
6	GPIO2	General purpose I/O pin
7	PWM(+)	Pulse Width Modulation; alternatively, a pin for the positive part of a differential PWM
8	PWM(-)	Pulse Width Modulation; alternatively, a pin for the negative part of a differential PWM
9	IRQ/GPIO	Interrupt request pin and/or general purpose I/O pin
10	SPI_SS_B/ GPIO	Host select pin for Serial Peripheral Interface (SPI) and/or general purpose I/O pin
11	I2C_SDA	Data pin for I2C interface. Always connected, bus type
12	I2C_SCL	Clock pin for I2C interface. Always connected, bus type
13	UART_RX	Receiver pin of target device UART
14	UART_TX	Transmitter pin of target device UART
15	SPI_SS_A	Client select for SPI. This pin should preferably not be connected to anything else
16	SPI_MOSI	SPI host out, client in pin. Always connected, bus type
17	SPI_MISO	SPI host in, client out pin. Always connected, bus type
18	SPI_SCK	SPI clock pin. Always connected, bus type
19	GND	Ground pin for extension boards
20	VCC	Power pin for extension boards

Pin on EXT	Function	Description
1	ID	Communication Line to ID Chip
2	GND	Ground
3	Y-LINE-5	Y-line 5: Connected to Driven Shield
4	Y-LINE-1	Y-line 1: Connected to Button 1
5	LED0	Touch Status LED for Slider
6	LED6	Touch Status LED for Button 1
7	Y-LINE-2	Y-line 2: Connected to Slider
8	Y-LINE-3	Y-line 3: Connected to Slider
9	Y-LINE-4	Y-line 4: Connected to Slider
10	Y-LINE-0	Y-line 4: Connected to Button 2
11	LED7	Touch Status LED for Button 2

Table 2. BIST Xplained Pro Extension Header J4
12	LED1	Touch Status LED for Slider
13	Not Connected
14	Not Connected
15	LED2	Touch Status LED for Slider
16	LED 3	Touch Status LED for Slider
17	LED 4	Touch Status LED for Slider
18	LED 5	Touch Status LED for Slider
19	GND	Ground
20	VCC	Target Supply Voltage