Signal Description
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 3-29
3.4.5.16 PE15 — GPIO (PE[15]) / I
2
C_A Serial Data Line (SDA_A) / DSPI_D
Peripheral Chip Select (PCS_D[5])
PE[15] is a GPIO pin. SDA_A is the serial data line for the I
2
C A module. PCS_D[5] is a peripheral chip
select output pin for the DSPI D module.
3.4.6 Port F Pins
3.4.6.1 PF0 — GPIO (PF[0]) / DSPI_A Clock (SCK_A)
PF[0] is a GPIO pin. SCK_A is the SPI clock pin for the DSPI A module.
3.4.6.2 PF1 — GPIO (PF[1]) / DSPI_A Data Output (SOUT_A)
PF[1] is a GPIO pin. SOUT_A is the data output pin for the DSPI A module.
3.4.6.3 PF2 — GPIO (PF[2]) / DSPI_A Data Input (SIN_A)
PF[2] is a GPIO pin. SIN_A is the data input pin for the DSPI A module.
3.4.6.4 PF3 — GPIO (PF[3]) / DSPI_A Peripheral Chip Select (PCS_A[0]) /
DSPI_B Peripheral Chip Select (PCS_B[5]) / DSPI_C Peripheral Chip
Select (PCS_C[4])
PF[3] is a GPIO pin. PCS_A[0] is a peripheral chip select input/output pin for the DSPI A module.
PCS_B[5] is a peripheral chip select output pin for the DSPI B module. PCS_C[4] is a peripheral chip
select output pin for the DSPI C module. PF[3] can be configured as a wakeup pin in the CRP_PWKENH
register.
3.4.6.5 PF4 — GPIO (PF[4]) / DSPI_B Clock (SCK_B) / DSPI_A Peripheral Chip
Select (PCS_A[1]) / DSPI_C Peripheral Chip Select (PCS_C[2])
PF[4] is a GPIO pin. SCK_B is the SPI clock pin for the DSPI B module. PCS_A[1] is a peripheral chip
select output pin for the DSPI A module. PCS_C[2] is a peripheral chip select output pin for the DSPI C
module.
3.4.6.6 PF5 — GPIO (PF[5]) / DSPI_B Data Output (SOUT_B) / DSPI_A Peripheral
Chip Select (PCS_A[2]) / DSPI_C Peripheral Chip Select (PCS_C[3])
PF[5] is a GPIO pin. SOUT_B is the data output pin for the DSPI B module. PCS_A[2] is a peripheral chip
select output pin for the DSPI A module. PCS_C[3] is a peripheral chip select output pin for the DSPI C
module.
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