Product Overview Intel® Server Board SE7520BD2 Technical Product Specification
22 Revision 1.3
All unused GPI pins must be pulled high or low, so that they are at a predefined level and do not
cause undue side effects.
Additional notes:
• GPIO 0:15 sticky bits on input, level triggered, 61 usec min time for latch
• GPI’s only: 0:15, 40-47 (note 42-47 unimplemented)
• GPO’s only: 16-23, 48-55 (note 49-55 unimplemented)
• GPI or GPO: 24-39 (note 35-39 unimplemented, GPIO[33] is changed to S-ATA LED
and this GPIO is NOT available)
• GPIO resume power well: 8-15, 24-25, 27-28
• GPIO core power well: 0-7, 16-23, 32-34, 40-41, 48
Table 6. GPIO on the Intel® Server Board SE7520BD2
ICH5-R Signal Type Pin PWR Well Tolerant Intel® Server Board SE7520BD2 Usage
INTRUDER DETECT Input Y12 Core 3.3V TP
GPI0/REQA Input A5 Core 5V Board SKU 0
GPI1/REQB/REQ5# Input E7 Core 5V Board SKU 1
GPI6/AGPBUSY# Input R5 Core 5V Bios Recover Boot
GPI7 Input U3 Core 5V MCH PME
GPI8 Input Y2 Resume 3.3V WAKE#/PCI PME#
GPI9/OC[4]# Input B14 Resume 3.3V
Reserved for USB OC4 (3 in back, 2 in
front)
GPI10/OC[5]# Input A14 Resume 3.3V PERR# for PCI 32bit/33Mhz slot
GPI11/SMBALERT# Input AC3 Resume 3.3V Board ID 0
GPI12 Input W4 Resume 3.3V SIO SMI
GPI13 Input W5 Resume 3.3V BMC IRQ SMI
GPI14/OC[6]# Input D13 Resume 3.3V SIO > ICH5-R PME
GPI15/OC[7]# Input C13 Resume 3.3V Password clear
GPO16/GNTA# Output E8 Core 3.3V TP
GPO17/GNTB#/GNT[5]# Output B4 Core 3.3V TP
GPO18/STP_PCI# Output U21 Core 3.3V TP
GPO19/SLP_S1# Output T20 Core 3.3V PWRGD Toggle (for PLL Select) TP
GPO20/STP_CPU# Output U22 Core 3.3V Video Disable
GPO21/C3_STAT# Output R1 Core 3.3V SCSI Disable
GPO22/CPUPERF# Output U20 Core 3.3V TP
GPO23/SSMUXSEL# Output F22 Core 3.3V
Legend connector
POST complete Indicator
GPIO24/CLKRUN# I/O AC1 Resume 3.3V Board ID 1
GPIO25 I/O W3 Resume 3.3V Board ID 2
GPIO27 I/O V3 Resume 3.3V TP
GPIO28 I/O W2 Resume 3.3V SM Module Present
GPIO32 I/O T1 Core 3.3V Board SKU 2
GPIO34 I/O F21 Core 3.3V IDE Primary Cable Sense
GPI40/REQ4# Input C6 Core 3.3V CMOS Clear
GPI41/LDRQ1# Input R2 Core 3.3V Emergency Bank Select
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