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| 型號： | 22505_1 |
| 英文描述： | AMD Test Interface Port Board Schematics? 149KB (PDF) |
| 中文描述： | AMD測試接口端口板原理圖？ 149KB（PDF格式） |
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Test Interface Port Board User’s Manual
2-23
Discrete Outputs Register
The following are the 8-bit and 16-bit addresses for the Discrete Outputs register:
Address: 8-bit = 302h, 16-bit = 304h
The Discrete Outputs register controls the eight individual general-purpose outputs
on the TIP board, as shown in Table 2-11. These outputs appear on the OUTPUT
side of connector P7. This read/write register can be used in a read-modify-write
manner. When this register is read, the value of each bit indicates the current state
of its associated output.
When an output bit is set to 1, the output is currently active (turned on/set to
5 V at the output).
When an output bit is cleared to 0, the output is currently inactive (turned off/set
to 0 V at the output)
When writing to this register, the new value is latched to the output drivers and the
output pins immediately reflect the state of the newly written bits.
Table 2-11. Discrete Outputs Register Bit Definitions
Bit
Pin
Description
0
2
The least significant (right most) output
1
4
The next most significant output
2
6
The next most significant output
3
8
The next most significant output
4
10
The next most significant output
5
12
The next most significant output
6
14
The next most significant output
7
16
The most significant (left most) output
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