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| 型號(hào)： | 22505_1 |
| 英文描述： | AMD Test Interface Port Board Schematics? 149KB (PDF) |
| 中文描述： | AMD測(cè)試接口端口板原理圖？ 149KB（PDF格式） |
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Test Interface Port Board User’s Manual
2-25
DIP Switch Inputs Register
The following are the 8-bit and 16-bit addresses for the DIP Switch Inputs register:
Address: 8-bit = 304h, 16-bit = 302h
The DIP Switch Inputs register (read-only) returns the state of the eight-position
DIP switch (SW4) on the TIP board, as shown in Table 2-12. When this register
is read, the value of each bit indicates the current state of its associated DIP switch.
When a bit reads 1, the input is currently active (turned on).
When a bit reads 0, the input is currently inactive (turned off).
Writing to this register has no effect on the state or operation of the TIP board.
Table 2-12. DIP Switch Inputs Register Bit Definitions
Bit
SW
Description
0
0
The first (least significant/left-most) switch
1
1
The second switch
2
2
The third switch
3
3
The fourth switch
4
4
The fifth switch
5
5
The sixth switch
6
6
The seventh switch
7
7
The eighth (most significant/right-most) switch
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