參數(shù)資料
型號: MC68HSC05J1A
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 61/128頁
文件大?。?/td> 1620K
代理商: MC68HSC05J1A
MC68HC05J1A — Rev. 3.0
Technical Data
MOTOROLA
Parallel Input/Output (I/O)
For More Information On This Product,
Go to: www.freescale.com
61
Technical Data — MC68HC05J1A
Section 7. Parallel Input/Output (I/O)
7.1 Contents
7.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
7.3
I/O Port Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
7.4
7.4.1
7.4.2
7.4.3
7.4.4
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Port A Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Data Direction Register A. . . . . . . . . . . . . . . . . . . . . . . . . . .63
Pulldown Register A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Port A External Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . .65
7.5
7.5.1
7.5.2
7.5.3
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Port B Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Data Direction Register B. . . . . . . . . . . . . . . . . . . . . . . . . . .68
Pulldown Register B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
7.2 Introduction
This section describes the two bidirectional input/output (I/O) ports.
7.3 I/O Port Function
The 14 bidirectional I/O pins form two parallel I/O ports. Each I/O pin is
programmable as an input or an output. The contents of the data
direction registers determine the data direction of each I/O pin.
All 14 I/O pins have mask-optional, software-programmable pulldown
devices.
F
Freescale Semiconductor, Inc.
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