User Guide • SC3-LARGO • CompactPCI
®
Serial CPU Board • Intel
®
Core
TM
5xxx Processor
GPIO Usage QM87 PCH
GPIO Type Voltage
1)
Function Description
30-31 I +V3.3A N/A Not used on SC3 (pulled via resistors to +3.3V)
32 I +V3.3S N/A Not used on SC3 (pulled via resistor to +3.3V)
33 O +V3.3S N/A Not connected on SC3
34 O +V3.3S EXP_SMB_EN Connect SMBus on P-EXP to local SMBus
LOW: P-EXP disconnected from SMBus
HIGH: P-EXP connected to SMBus
35 O +V3.3S CPCI_SMB_EN Connect SMBus on CompactPCI Serial to local SMBus
LOW: CPCI Backplane disconnected from SMBus
HIGH: CPCI Backplane connected to SMBus
36 I +V3.3S N/A Not used on SC3 (pulled via resistor to GND)
37 I +V3.3S N/A Not used on SC3 (pulled via resistor to +3.3V)
38 O +V3.3S SGPIO_LOAD CompactPCI Serial GPIO Bus LOAD (P1 K3: SATA_SL)
39 O +V3.3S SGPIO_OUT CompactPCI Serial GPIO Bus DATAOUT (P1 H3: SATA_SDO)
40 I +V3.3A USB_OC1# USB Front Panel Left Port Overcurrent Detect
41 O +V3.3A ENABLE_NC3 Enable Ethernet Controller NC3
42 O +V3.3A ENABLE_NC4 Enable Ethernet Controller NC4
43 I +V3.3A USB_OC4# USB P-HSE Port 1 Overcurrent Detect
44 I +V3.3A PCIE_CLK_REQ5# CompactPCI
®
Clock Request Slot 8 (P5 J6: 8_PE_CLKE#)
45 I +V3.3A PCIE_CLK_REQ6# CompactPCI
®
Clock Request Slot 7 (P5 G6: 7_PE_CLKE#)
46 I +V3.3A PCIE_CLK_REQ7# CompactPCI
®
Clock Request Slot 3 (P5 I5: 3_PE_CLKE#)
47 I +V3.3A PEG_A_CLK_RQ# CompactPCI
®
Clock Request Slot 1 (P5 C5: 1_PE_CLKE#)
48-49 I +V3.3S N/A Not used on SC3 (pulled via resistors to GND)
50 I +V3.3S HWREV PCB Revision Code HWREV[2:0]:
GPIO[54/52/50] 000 001 010 ... 111
Revision 012...7
51 O +V3.3S N/A Not used on SC3 (pulled via resistor to +3.3V)
52 I +V3.3S HWREV PCB Revision Code HWREV[2:0], see GPIO50
53 O +V3.3S N/A Not connected on SC3
54 I +V3.3S HWREV PCB Revision Code HWREV[2:0], see GPIO50
55 O +V3.3S ENABLE_NC2 Enable Ethernet Controller NC2
56 I +V3.3A PEG_B_CLK_RQ# CompactPCI
®
Clock Request Slot 2 (P5 F5: 2_PE_CLKE#)
57 I +V3.3A N/A TPM2.0 Physical Present Pin
58 I +V3.3A N/A Not used on SC3 (pulled via resistor to +3.3V)
59 I +V3.3A USB_OC0# USB Front Panel Right Port Overcurrent Detect
60 I +V3.3A N/A Not used on SC3 (pulled via resistor to +3.3V)
61-62 O +V3.3A N/A Not connected on SC3
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