Signal Description
PXN20 Microcontroller Reference Manual, Rev. 1
3-22 Freescale Semiconductor
3.4.2.4 PB3 — GPIO (PB[3]) / Analog Input (AN[19]) / Analog Input Channel for
External Mux (ANZ)
PB[3] is a GPIO pin. AN[19] is a single-ended analog input pin. ANZ is an input channel for the ADC
external multiplexer.
3.4.2.5 PB4 to PB7 — GPIO (PB[4:7]) / Analog Input (AN[20:23])
PB[4:7] are GPIO pins. AN[20:23] are single-ended analog input pins. PB[4:7] can be configured as
wakeup pins in the CRP_PWKENL register.
3.4.2.6 PB8 — GPIO (PB[8]) / Analog Input (AN[24]) / DSPI_A Peripheral Chip
Select (PCS_A[2])
PB[8] is a GPIO pin. AN[24] is a single-ended analog input pin. PCS_A[2] is a peripheral chip select
output pin for the DSPI A module.
3.4.2.7 PB9 — GPIO (PB[9]) / Analog Input (AN[25]) / DSPI_A Peripheral Chip
Select (PCS_A[3])
PB[9] is a GPIO pin. AN[25] is a single-ended analog input pin. PCS_A[3] is a peripheral chip select
output pin for the DSPI A module.
3.4.2.8 PB10 — GPIO (PB[10]) / Analog Input (AN[26]) / DSPI_B Peripheral Chip
Select (PCS_B[4])
PB[10] is a GPIO pin. AN[26] is a single-ended analog input pin. PCS_B[4] is a peripheral chip select
output pin for the DSPI B module.
3.4.2.9 PB11 — GPIO (PB[11]) / Analog Input (AN[27]) / DSPI_B Peripheral Chip
Select (PCS_B[5])
PB[11] is a GPIO pin. AN[27] is a single-ended analog input pin. PCS_B[5] is a peripheral chip select
output pin for the DSPI B module.
3.4.2.10 PB12 — GPIO (PB[12]) / Analog Input (AN[28]) / DSPI_C Peripheral Chip
Select (PCS_C[1])
PB[12] is a GPIO pin. AN[28] is a single-ended analog input pin. PCS_C[1] is a peripheral chip select
output pin for the DSPI C module.
3.4.2.11 PB13 — GPIO (PB[13]) / Analog Input (AN[29]) / DSPI_C Peripheral Chip
Select (PCS_C[2])
PB[13] is a GPIO pin. AN[29] is a single-ended analog input pin. PCS_C[2] is a peripheral chip select
output pin for the DSPI C module.
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