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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
2-19
Discrete LED Outputs Register
The following are the 8-bit and 16-bit addresses for the Discrete LED Outputs
register:
Address: 8-bit = 305h, 16-bit = 300h
The Discrete LED Outputs register controls the eight individual LEDs on the TIP
board, as shown in Table 2-9. This is a read/write register and can be used in a
read-modify-write manner.
When an LED bit is set to 1, the corresponding LED is turned on.
When an LED bit is cleared to 0, the LED is turned off.
When writing to this register, the new value is latched at the LED drivers and the
LEDs immediately reflect the state of the newly written bits.
Table 2-9. Discrete LED Outputs Register Bit Definitions
Bit
LED
Description
0
D0
The least significant LED (right-most LED)
1
D1
The next most significant LED
2
D2
The next most significant LED
3
D3
The next most significant LED
4
D4
The next most significant LED
5
D5
The next most significant LED
6
D6
The next most significant LED
7
D7
The most significant LED (left-most LED)
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