User’s Manual
2.4.2.1.9 Power & System Management Signals
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| SUS_S3# |
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| Indicates system is in Suspend to RAM state. Active low output. |
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| SUS_S4# |
| Indicates system is in Suspend to Disk state. Active low output. |
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| SUS_S5# |
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| Indicates system is in Soft Off state. Also known as "PS_ON" and can be used to | |||||
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| control an ATX power supply. |
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| BATLOW# |
| Indicates that external battery is low |
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| PWRBTN# |
| Power button to bring system out of S5 (soft off), active on rising edge. |
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| SMB_CK |
| System Management Bus bidirectional | clock | line. Power | sourced | through | 5V | |
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| standby rail and main power rails. |
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| SMB_DTA |
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| System Management Bus bidirectional | data | line. Power | sourced | through | 5V |
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| standby rail and main power rails. |
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| System Management Bus Alert - input can be used to generate an SMI# (System | |||||
| SMB_ALERT# |
| Management Interrupt) or to wake the system. Power sourced through 5V standby | ||||||
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| rail and main power rails. |
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| SUS_STAT# |
| Indicates imminent suspend operation; used to notify LPC devices |
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| PWR_OK |
| Power OK from main power supply |
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| THRMTRIP# |
| Active low output indicating that the CPU has entered thermal shutdown. |
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| THRM# |
| Input from |
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| SYS_RESET# |
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| Reset button input. Active low input. System is held in hardware reset while this | |||||
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| input is low, and comes out of reset upon release. |
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| RSMRST# |
| Resume reset input, active low. Resets power plane logic. May be left open on | ||||||
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| WAKE0# |
| PCI Express wake up signal |
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| WAKE1# |
| General purpose wake up signal |
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Signal | Signal Description |
SATA[0:3]_TX +/- | Serial ATA Channel |
SATA[0:3]_RX +/- | Serial ATA Channel |
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ATA_ACT# | ATA (parallel and serial) activity indicator, active low. |
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