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3.2.4
Pinning
Table 2 shows the pinout of XE121 connectors to XC120 and ST Nucleo development boards:
Table 2. Pinout of XE121 connectors to XC120 and ST Nucleo development boards.
Pin
XC120 (J6)
10
I2C1.SCL
9
I2C1.SDA
8
NC
7
GND
6
SPI3.SCK
5
SPI3.MISO
4
SPI3.MOSI
3
SPI3.SS
2
SYNC
1
SEN_INT.1
Pin
XC120 (J7)
8
SEN_INT.2
7
SEN_INT.3
6
SEN_INT.4
5
SEN_EN.2
4
SEN_EN.3
3
SEN_EN.4
2
UART4_TX
1
UART4_RX
Pin
XC120 (J8)
1
NC
2
+3V3
3
PE3
4
+3V3
5
+5V
6
GND
7
GND
8
VIN
Pin
XC120 (J9)
1
SPI3.SEL2/UART4 CTS
2
SPI3.SEL1/UART4 RTS
3
SPI3.SEL0
4
SEN_EN.1/DUART6 TX
5
SEN_EN.5/DUART6 RX
6
SEN_INT.5
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XE121 (J2)
ST Nucleo
I2C.SCL
D15
I2C.SDA
D14
NC
AVDD
GND
GND
SPI.SCK.CON
D13
D12
SPI.MISO.CON
SPI.MOSI.CON
D11
SPI.SS
D10
SYNC
D9
SEN_INT.1
D8
XE121(J4)
ST Nucleo
SEN_INT.2
D7
SEN_INT.3
D6
SEN_INT.4
D5
SEN_EN.2
D4
SEN_EN.3
D3
SEN_EN.4
D2
NC
D1
NC
D0
XE121(J3)
ST Nucleo
NC
NC
NC
IOREF
NC
RESET
+3V3
+3V3
+5V
+5V
GND
GND
GND
GND
NC
VIN
XE121(J5)
ST Nucleo
SPI.SEL2
A0
SPI.SEL1
A1
SPI.SEL0
A2
SEN_EN.1
A3
SEN_EN.5
A4
SEN_INT.5
A5
A121 EVK – User Guide
Description
Used for EEPROM on the XE121
Used for EEPROM on the XE121
SPI interface for communication with
sensor on XE121 and XS121
SPI interface for communication with
sensor on XE121 and XS121
SPI interface for communication with
sensor on XE121 and XS121
SPI interface for communication with
sensor on XE121 and XS121
Signal for sensor synchronization
XE121 sensor Interrupt signal
Description
XS121 sensor interrupt signal
XS121 sensor interrupt signal
XS121 sensor interrupt signal
XS121 sensor enable signal
XS121 sensor enable signal
XS121 sensor enable signal
Not used on XE121
Not used on XE121
Description
Not used on XE121
Not used on XE121
Not used on XE121
Not used on XE121
Description
SPI selection for LVDS enable and SPI SS
SPI selection for LVDS enable and SPI SS
SPI selection for LVDS enable and SPI SS
XE121 sensor enable signal
XS121 sensor enable signal
XS121 sensor interrupt signal
22
2022-07-07
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