HCS12 datasheet(65/126 Pages) NXP

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Device User Guide — 9S12KT256DGV1/D V01.09

Freescale Semiconductor

2.3.23 PH3 / KWH3 / SS1 — Port H I/O Pin 3

PH3 is a general purpose input or output pin. It can be configured to generate an interrupt causing the MCU

to exit STOP or WAIT mode. It can be configured as slave select pin SS of the Serial Peripheral Interface

1 (SPI1).

2.3.24 PH2 / KWH2 / SCK1 — Port H I/O Pin 2

PH2 is a general purpose input or output pin. It can be configured to generate an interrupt causing the MCU

to exit STOP or WAIT mode. It can be configured as serial clock pin SCK of the Serial Peripheral Interface

1 (SPI1).

2.3.25 PH1 / KWH1 / MOSI1 — Port H I/O Pin 1

PH1 is a general purpose input or output pin. It can be configured to generate an interrupt causing the MCU

to exit STOP or WAIT mode. It can be configured as master output (during master mode) or slave input

pin (during slave mode) MOSI of the Serial Peripheral Interface 1 (SPI1).

2.3.26 PH0 / KWH0 / MISO1 — Port H I/O Pin 0

PH0 is a general purpose input or output pin. It can be configured to generate an interrupt causing the MCU

to exit STOP or WAIT mode. It can be configured as master input (during master mode) or slave output

(during slave mode) pin MISO of the Serial Peripheral Interface 1 (SPI1).

2.3.27 PJ7 / KWJ7 / TXCAN4 / SCL — PORT J I/O Pin 7

PJ7 is a general purpose input or output pin. It can be configured to generate an interrupt causing the MCU

to exit STOP or WAIT mode. It can be configured as the transmit pin TXCAN for the Motorola Scalable

Controller Area Network controller 4 (CAN4) or the serial clock pin SCL of the IIC module.

2.3.28 PJ6 / KWJ6 / RXCAN4 / SDA — PORT J I/O Pin 6

PJ6 is a general purpose input or output pin. It can be configured to generate an interrupt causing the MCU

to exit STOP or WAIT mode. It can be configured as the receive pin RXCAN for the Motorola Scalable

Controller Area Network controller 4 (CAN4) or the serial data pin SDA of the IIC module.

2.3.29 PJ[1:0] / KWJ[1:0] — Port J I/O Pins [1:0]

PJ1 and PJ0 are general purpose input or output pins. They can be configured to generate an interrupt

causing the MCU to exit STOP or WAIT mode.

2.3.30 PK7 / ECS / ROMCTL — Port K I/O Pin 7

PK7 is a general purpose input or output pin. During MCU expanded modes of operation, this pin is used

as the emulation chip select output (ECS). During MCU expanded modes of operation, this pin is used to

HCS12 Datasheet(PDF) 65 Page - NXP Semiconductors