參數(shù)資料
型號: Z86307
廠商: ZiLOG, Inc.
英文描述: 8 Bit CMOS MCU for PS/2 mouse(8位CMOS鼠標(biāo)微控制器)
中文描述: 8位CMOS微控制器的PS / 2鼠標(biāo)(8位的CMOS鼠標(biāo)微控制器)
文件頁數(shù): 11/24頁
文件大小: 326K
代理商: Z86307
Z86307
ZiLOG
8-Bit CMOS Z8 MCU For PS/2 Mouse and Trackball Applications
DS007400-PER0399
P R E L I M I N A R Y
11
Port 2 (P27–P20).
Port 2 is an 8-bit, bit programmable, bi-
directional, CMOS-compatible I/O port. These eight I/O
lines can be configured under software control to be input
or output, independently. Bits programmed as outputs may
be globally programmed as either push-pull or open-drain.
When configured as inputs, P20 and P22 have 10 Kom (typ-
ical) pull-up resistors (Figure 10). However, P21 and P23
do not have resistors (Figure 11).
Figure 10. Port 2 P20, P22 Configuration
Figure 11. Port 2 P21, P23 Configuration
OEN
Out
In
Open-Drain
V
Pad
10 kOhm,
±
20%
DD
OEN
Out
In
Open-Drain
Pad
V
DD
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