MS-91A2 Server Board
Programming Guide
LPC I/O address: 5E
Power ON/OFF State Bypass Control Status Register
Set/Read bypass mode
Default Value: 0xD0 (Base on Customer Demand)
Power ON/OFF State Bypass Control Status Register
I/O Address: 5E
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
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X | X | X | X | R/W | R/W | R/W | R/W | |
Not | Not | Not | Not | Segment 4 | Segment 3 | Segment 2 | Segment 1 | |
Used | Used | Used | Used | |||||
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Bit Definition
Power ON/OFF State Bypass Control Status Register
Bit Field | Name | Value |
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3：0 | Segment | Segment control bit. Each bit corresponds to a specific segment |
| 1 to 4 | numbered 1 thru 4. |
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| Write： |
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| 1: Force Bypass |
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| 0: Force Pass Through |
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| Read： |
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| 1: Bypass Mode |
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| 0: Pass Through Mode |
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PWRON Signal Action
Segment | Signal Name | Description | Type | Bypass | Pass Through | |
Segment 1 | RELAY_SET1# | Enable LAN 3~4 bypass | Output | 1 | 0 | |
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RESET_RESET1# | Enable LAN 3~4 bypass | Output | 0 | 1 | ||
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Segment 2 | RELAY_SET2# | Enable LAN 1~2 bypass | Output | 1 | 0 | |
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RESET_RESET2# | Enable LAN 1~2 bypass | Output | 0 | 1 | ||
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PWROFF Signal Action
Segment | Signal Name | Description | Type | Bypass | Pass Through | |
Segment 3 | RELAY_SET1# | Enable LAN 3~4 bypass | Output | 1 | 0 | |
RESET_RESET1# | Enable LAN 3~4 bypass | Output | 0 | 1 | ||
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Segment 4 | RELAY_SET2# | Enable LAN 1~2 bypass | Output | 1 | 0 | |
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RESET_RESET2# | Enable LAN 1~2 bypass | Output | 0 | 1 | ||
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