参数资料
型号: MC68HC05P9DWR2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 51/88页
文件大小: 6557K
代理商: MC68HC05P9DWR2
6
MOTOROLA
6-8
MC68HC05E0
PARALLEL INPUT/OUTPUT PORTS
Figure 6-5
Port Logic Levels
Pad
Data Direction Register bit DDRn
Y
S
A
DDRn
A
Y
Normal operation - tri-state
1
0
1
0
1
low
---
high
Open drain
1
0
1
0
1
0
1
tri-state
(a)
(b)
VDD
Px0
V
DD
DDRx, Bit0 = 0
PORTx, Bit0 = 0
DDRx, Bit0 = 1
PORTx, Bit0 = 0
(c)
60
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