User Guide • SC3-LARGO • CompactPCI
®
Serial CPU Board • Intel
®
Core
TM
5xxx Processor
GPIO Usage
GPIO Usage QM87 PCH
GPIO Usage QM87 PCH
GPIO Type Voltage
1)
Function Description
0 I +V3.3S THRM_ALERT# Monitoring of processor PROCHOT#
1 I +V3.3S EXP_SMI# Expansion Interface SMI Request (P-EXP Pin 15)
2-3 I +V3.3S N/A Not used on SC3 (pulled via resistors to GND)
4 I +V3.3S CPCI_PWR_FAIL# Sense CompactPCI
®
Serial Power Failure Line PWR_FAIL#
5 I +V3.3S PM_MEMTS# Memory Thermal Sensor Event
6 I +V3.3S N/A Not used on SC3 (pulled via resistor to GND)
7 I +V3.3S GP_JUMP# Reset UEFI BIOS Setup to Factory Defaults, Jumper J-GP
8 O +V3.3A CPCI_SYSEN# Sense CompactPCI
®
System Slot Enable Line SYSEN#
9 I +V3.3A USB_OC5# USB P-HSE Port 2 Overcurrent Detect
10 I +V3.3A USB_OC6# USB P-HSE Port 3 or 4 Overcurrent Detect
11 I +V3.3A NV_GP1 Non-Volatile Jumper NV-GP1
12 O +V3.3A NC1_ENABLE Enable Ethernet Controller NC1
13 I +V3.3A HM_INT# Hardware Monitor LM87 Interrupt Line
14 I +V3.3A USB_OC7# USB P-EXP Port 1 or 2 Overcurrent Detect
15 O +V3.3A N/A Not connected on SC3
16 O +V3.3S SE_SYS_WP General Purpose Serial EEPROM Write Protection
17 I +V3.3S PPSM_EN Connect IEEE 1588 PPS/PPM to J-GP and CompactPCI
®
P1
LOW: PPS/PPM disconnected from J-GP and P1
HIGH: PPS/PPM connected to J-GP and P1
18 O +V3.3S GP_LED_RED General Purpose Red LED Control (via PLD)
19 I +V3.3S N/A Not used on SC3 (pulled via resistor to +3.3V)
20 I +V3.3S PCIE_CLK_REQ2# CompactPCI
®
Clock Request Slot 5 (P5 A6: 5_PE_CLKE#)
21 I +V3.3S N/A Not used on SC3 (pulled via resistor to GND)
22 O +V3.3S SGPIO_CLOCK CompactPCI Serial GPIO Bus CLOCK (P1 J3: SATA_SCL)
23 I +V3.3S N/A Not connected on SC3
24 O +V3.3A USB_POWEN1# USB Front Panel Right Port Power Enable
25 I +V3.3A PCIE_CLK_REQ3# CompactPCI
®
Clock Request Slot 6 (P5 D6: 6_PE_CLKE#)
26 I +V3.3A PCIE_CLK_REQ4# CompactPCI
®
Clock Request Slot 4 (P5 L5: 4_PE_CLKE#)
27 I +V3.3A NC1_WAKE# Ethernet Controller NC1 WAKE#
28 O +V3.3A USB_POWEN2# USB Front Panel Left Port Power Enable
29 O +V3.3A N/A Not connected on SC3
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