參數(shù)資料
型號(hào): 68HC05M68HC
廠商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 51/130頁
文件大小: 1541K
代理商: 68HC05M68HC
MC68HC705P6A
Rev. 2.0
Advance Information
MOTOROLA
Input/Output Ports
51
Advance Information
MC68HC705P6A
Section 6. Input/Output Ports
6.1 Contents
6.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
6.3
Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
6.4
Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
6.5
Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
6.6
Port D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
6.7
I/O Port Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
6.2 Introduction
In the user mode, 20 bidirectional I/O lines are arranged as two 8-bit I/O
ports (ports A and C), one 3-bit I/O port (port B), and one 1-bit I/O port
(port D). These ports are programmable as either inputs or outputs
under software control of the data direction registers (DDRs). Port D also
contains one input-only pin.
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