M68HC08 datasheet(34/408 Pages) MOTOROLA

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General Description

Technical Data

MC68HC908GR8 — Rev 4.0

General Description

MOTOROLA

1.6.10 Port C I/O Pins (PTC1–PTC0)

PTC1–PTC0 are general-purpose, bidirectional I/O port pins. See

Input/Output Ports (I/O). PTC0 and PTC1 are only available on 32-pin

QFP packages.

These port pins also have selectable pullups when configured for input

mode. The pullups are disengaged when configured for output mode.

The pullups are selectable on an individual port bit basis.

1.6.11 Port D I/O Pins (PTD6/T2CH0–PTD0/SS)

PTD6–PTD0 are special-function, bidirectional I/O port pins.

PTD3–PTD0 can be programmed to be serial peripheral interface (SPI)

pins, while PTD6–PTD4 can be individually programmed to be timer

interface module (TIM1 and TIM2) pins. See Timer Interface Module

(TIM), Serial Peripheral Interface (SPI), and Input/Output Ports (I/O).

These port pins also have selectable pullups when configured for input

mode. The pullups are disengaged when configured for output mode.

The pullups are selectable on an individual port bit basis.

When the port pins are configured for special-function mode (SPI, TIM1,

TIM2), pullups can be selectable on an individual port pin basis.

1.6.12 Port E I/O Pins (PTE1/RxD–PTE0/TxD)

PTE1–PTE0 are special-function, bidirectional I/O port pins. These pins

can also be programmed to be serial communications interface (SCI)

pins. See Serial Communications Interface (SCI) and Input/Output Ports

(I/O).

NOTE:

Any unused inputs and I/O ports should be tied to an appropriate logic

level (either VDD or VSS). Although the I/O ports of the MC68HC908GR8

do not require termination, termination is recommended to reduce the

possibility of electro-static discharge damage.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

M68HC08 Datasheet(PDF) 34 Page - Motorola, Inc