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X21 pinout
A19 ADC_IN6 B19 ADC_IN7
A20 +3.3V B20 +3.3V
X20 pin Signal X20 pin Signal
X21 pin Signal X21 pin Signal
C1 DCDA#/SPI_EN/GPIO0 D1 CTSA#/GPIO1
C2 RIA#/EIRO2/GPIO4 D2 RTSA#/SPI_CLK/GPIO5
C3 DCDC#/TXCLKC/GPIO8 D3 CTSC#/GPIO9
C4 RIC#/RXCLKC/GPIO12 D4 RTSC#/RCLKC/GPIO13
C5 DCDB#/GPIO51 D5 CTSB#/GPIO52
C6 RIB#/GPIO55 D6 RTSB#/GPIO56
C7 DCDD#/GPIO59 D7 CTSD#/GPIO60
C8 RID#/GPIO63 D8 RTSD#/GPIO64
C9 GPIO67 D9 GPIO68
C10 GPIO71 D10 GPIO72
C11 GPIO75 D11 GPIO76
C12 GPIO79 D12 GPIO80
C13 GPIO83 D13 USER_BUTTON2#/GPIO84
C14 GPIO87 D14 GPIO93
C15 CAN0_RXD/GPIO96 D15 CAN0_TXD/GPIO97
C16 GPIO100 D16 EIR03#/GPIO101
C17 ADC_IN0 D17 ADC_IN1
C18 ADC_IN4 D18 ADC_IN5
C19 AGND_ADC D19 VREF_ADC
C20 GND D20 GND