MAC7200 datasheet(873/976 Pages) FREESCALE

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MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

795

Chapter 34

Port Integration Module (PIM_MAC7202)

34.1

Introduction

34.1.1

Overview

The Port Integration Module implements the interfaces between the peripheral modules and the I/O pins,

as well as the GPIO functionality. Figure 34-1 shows the block diagram of this module. The MAC7200

family implements up to seven 16-bit ports. Each pin on the device can be independently configured as

follows:

•

Pin functionality (GPIO, interrupt input or peripheral)

•

Port direction (GPIO mode only)

•

Pull-down or Pull-up enable

•

Open drain enable

•

Slew rate control

When selected to be in Peripheral mode, both the pin’s output and the pin’s configuration are controlled

by the associated peripheral. Figure 34-1 shows the allocation of the different peripherals to the ports.

To assist in software development, all pins can be controlled either in a port-wise or bit-wise manner.

Registers are provided which allow each pin to be independently controlled by writing to a separate

a port at the same time.

Each pin is also capable of being used as interrupt source and a pin filter is available to help eliminate

glitches that may generate false interrupts. Like all other interrupt sources in the system, the Port interrupts

may also be used to wakeup the system from low power modes.

Table 34-1. Port Pin and Peripheral Allocation

Port

Peripheral

Port B[0:15]

IIC, DSPI_A, DSPI_B

Port D[2]

GPIO (PIM) Clock

Port D[3:4]

Interrupt Controller

Port E[0:15]

ATD_A

Port F[0:15]

eMIOS, DSPI_C

Port G[0:15]

SCI_A, SCI_B, CAN_A, CAN_B

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