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參數(shù)資料
| 型號(hào)： | Z86319 |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | PS/2 MOUSE CONTROLLER |
| 中文描述： | PS / 2鼠標(biāo)控制器 |
| 文件頁數(shù)： | 12/23頁 |
| 文件大?。?/td> | 278K |
| 代理商： | Z86319 |
Z86319
PS/2 Mouse Controller
Zilog
12
P R E L I M I N A R Y
DS97KEY1605
PIN FUNCTIONS
(Continued)
Port 3
(P33, P31). Port 3 is a 2-bit, CMOS-compatible
port with two fixed input lines (P33, P31). These two lines
can also be used as the interrupt sources IRQ2 and IRQ1.
P31 can also be configured as a timer input. Both lines can
be configured through ROM mask selection to sink or
source current emulating a 100K pull-up or pull-down re-
sistor (Figure 12). Port 33-31 can be accessed through
the P3 register. The upper 4 bits of this 8-bit register al-
ways reads “1111.” Bit D2 reads 0 and Bit D0 reads 1. Bits
D3 and D1 represent P33 and P31 respectively (see Fig-
ure 36).
Figure 12. Port 3 P33, P31 Configuration
P31
Pad
P33
IRQ2, TIN
Data Latch
Data Latch
IRQ1
Pad
Pull-Up Enable
(Mask Option)
Pull-Down/Enable
(Mask Option)
Pull-Up Enable
(Mask Option)
Pull-Down/Enable
(Mask Option)
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