Software Functional Overview
3.3.15 VT82C686B GPO pin assignment
| Pin Name | Function Name | Connected Device | Description |
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| GPO[0] | N.C. |
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| GPO[1] | SUSA# | VT8603, PMU07, | This pin will output Low to |
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| Clock Generator | power down devices | during |
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| Standby, | STR, | STD | and |
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| SOFF |
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| GPO[2] | SUSB# |
| Low = Suspend to RAM |
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| GPO[3] | SUS_STA1# | VT8603 | Low = Suspend Status 1. |
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| GPO[4] | CPU_STP# | Clock Generator, | Low = CPU clock Stop. |
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| SpeedStep Controller |
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| GPO[5] | PCI_STP# | Colck Generator | Low = PCI clock Stop. |
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| GPO[7] | SLP# | VT8603 | This pin will output Low to |
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| power down devices | during |
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| Standby, | STR, | STD | and |
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| SOFF |
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| GPO[8] | GCLSMENA# | PCA9559 | Low = Disable PCA 9559 |
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| Write Protect feature |
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| GPO[9] | BIOSWEN# | BIOS ROM | Low = Enable Write BIOS |
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| ROM |
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| GPO[10] | GPI[10] |
| Refer GPI[10] |
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| GPO[11] | GPI[11] |
| Refer GPI[11] |
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| GPO[12] | PMUCS1# | PMU07 | Low = Select PMU07 Chip |
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| (PCS0#) |
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| GPO[13] | PMUCS0# | PMU07 | Low = Select PMU07 Chip |
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| (MCCS#) |
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| GPO[14] | IRTX# | SIR | Infrared Transmit. |
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| GPO[15] | IRRX# | SIR | Infrared Receive. |
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| GPO[16] | FAN_HI/LO | FAN | High = FAN work on high |
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| speed |
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| Low = FAN work on low |
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| speed |
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| GPO[17] | FANON# | FAN | Low = Turn on FAN |
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| GPO[18] | PCMUTE# | Speaker | Low = PC sound off |
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| GPO[19] | PCI_SERIRQ | CardBus Controller | Serial Interrupt Request |
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| GPO[20] | FETON | PHS Connector | Enable PHS power |
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| GPO[21] | BLEN | LCD Panel | Low = Turn off LCD Backlight |
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| GPO[22] | DRAMENA |
| Select SMBus Device |
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| 00:DRAM Slot1 | 01:DRAM |
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| Slot2 |
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| GPO[23] | DRAMENB |
| 10:NC |
| 11:Clock |
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| Generator |
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| GPO[24] | USBOC1# | USB Connector 1 | Low = USB Port 1 Over |
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| Current Detect |
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| GPO[25] | USBOC0# | USB Connector 0 | Low = USB Port 0 Over |
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| Current Detect |
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FIC A360 Service Manual |
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