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參數(shù)資料
| 型號(hào)： | 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)： | 9/24頁 |
| 文件大?。?/td> | 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
9
Port 0 (P02–P00).
Port 0 is a 3-bit, I/O programmable, bi-
directional, CMOS-compatible I/O port. These three I/O
lines can be configured under software control to be input
or output (Figure 7). When Port 0 is configured as an input
port, all lines source current emulating a 100K pull-up re-
sistor. Current versus pin voltage graphs are shown in Fig-
ure 8. Port 00–02 can be accessed through the P0 register
(register address 00). The upper 5 bits of this 8-bit register
always reads “11111”. Writing to the upper 5 bits has no
effect (See Figure 35.) The lower 3 bits of the P0 register
are read/write.
Figure 7. Port 0 Configuration
OE
Out
In
Pad
Pull-Up
Enable
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