MC68HC705P9CS datasheet(29/160 Pages) FREESCALE

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Pin Descriptions

Pin Functions

MC68HC705P9 — Rev. 4.0

Technical Data

MOTOROLA

Pin Descriptions

2.3.4 IRQ/VPP

The IRQ/VPP pin has the following functions:

•

Applying asynchronous external interrupt signals

•

Applying VPP, the EPROM/OTPROM programming voltage

2.3.5 PA7–PA0

PA7–PA0 are general-purpose bidirectional I/O port pins. Use data

direction register A to configure port A pins as inputs or outputs.

2.3.6 PB7/SCK–PB5/SDO

Port B is a 3-pin bidirectional I/O port that shares its pins with the SIOP.

Use data direction register B to configure port B pins as inputs or

outputs.

2.3.7 PC7/VRH–PC0

Port C is an 8-pin bidirectional I/O port that shares five of its pins with the

ADC. Use data direction register C to configure port C pins as inputs or

outputs.

2.3.8 PD7/TCAP and PD5

Port D is a 2-pin I/O port that shares one of its pins with the

capture/compare timer. Use data direction register D to configure port D

pins as inputs or outputs.

2.3.9 TCMP

The TCMP pin is the output compare pin for the capture/compare timer.

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MC68HC705P9CS 数据表(PDF) 29 Page - Freescale Semiconductor, Inc