MC3S12RG128 Datasheet, PDF (59/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 1 Device Overview (MC3S12RG128V1)
1.2.3.30 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.
1.2.3.31 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). While configurating MCU expanded modes, this pin is used to
enable the ROM memory in the memory map (ROMCTL). At the rising edge of RESET, the state of this
pin is latched to the ROMON bit. For a complete list of modes refer to 1.4 Chip Configuration Summary.
1.2.3.32 PK[5:0] / XADDR[19:14] — Port K I/O Pins [5:0]
PK5-PK0 are general purpose input or output pins. In MCU expanded modes of operation, these pins
provide the expanded address XADDR[19:14] for the external bus.
1.2.3.33 PM7 / TXCAN4 — Port M I/O Pin 7
PM7 is a general purpose input or output pin. It can be configured as the transmit pin TXCAN of the
Freescale Scalable Controller Area Network controllers 4 (CAN4).
1.2.3.34 PM6 / RXCAN4 — Port M I/O Pin 6
PM6 is a general purpose input or output pin. It can be configured as the receive pin RXCAN of the
Freescale Scalable Controller Area Network controllers 4 (CAN4).
1.2.3.35 PM5 / TXCAN0 / TXCAN4 / SCK0 — Port M I/O Pin 5
PM5 is a general purpose input or output pin. It can be configured as the transmit pin TXCAN of the
Freescale Scalable Controller Area Network controllers 0 or 4 (CAN0 or CAN4). It can be configured as
the serial clock pin SCK of the Serial Peripheral Interface 0 (SPI0).
1.2.3.36 PM4 / RXCAN0 / RXCAN4/ MOSI0 — Port M I/O Pin 4
PM4 is a general purpose input or output pin. It can be configured as the receive pin RXCAN of the
Freescale Scalable Controller Area Network controllers 0 or 4 (CAN0 or CAN4). It can be configured as
the master output (during master mode) or slave input pin (during slave mode) MOSI for the Serial
Peripheral Interface 0 (SPI0).
1.2.3.37 PM3 / TXCAN0 / SS0 — Port M I/O Pin 3
PM3 is a general purpose input or output pin. It can be configured as the transmit pin TXCAN of the
Freescale Scalable Controller Area Network controller 0 (CAN0). It can be configured as the slave select
pin SS of the Serial Peripheral Interface 0 (SPI0).
MC3S12RG128 Data Sheet, Rev. 1.05
Freescale Semiconductor
59