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Intel® Server Board SE7320SP2 & Intel Server Board SE7525GP2 TPS Functional Architecture
Revision 2.0
56
3.6.9.1 GPIOs
The National Semiconductor* PC87427 Super I/O provides nine general-purpose input/output
pins that the SE7320SP2 and server board SE7525GP2s utilizes. The following table identifies
the pin and the signal name used in the schematic:
Table 13: Super I/O GPIO Usage Table
Pin Name
(Powe
Well)
GPI / GPO /
Function
Signal Name Function Description
GPIO00 Standby Input MANUF_DET_N
Active Low when Manufacturing
Mode Detect (J35)
GPIO05/LMPCIF2 Standby Input/Output SIO_TEMP_SENSOR
Single wire temp sensor from
LM30.
GPIO6 Standby Output BIOS_SEL
Selects BIOS flash bank (A21 bit)
for rolling BIOS feature.
GPIO7/HFCKOUT Standby Output CLK_10M_MBMC
HFCKOUT- 10MHz clock to
mBMC (not used)
GPIO27/SUPER IOSMI Standby Output SUPER IO_SMI_N
Active Low to generate a SMI to
6300ESB ICH
GPIOE40 Standby Input 2U_RISER_DETECT
Riser card type detect – Pin B92
of PCI-X Slot 1.
GPIOE41 Standby Input/Output RISER_PRESENT2
Riser card type detect – Pin B93
of PCI-X Slot 1.
GPIOE42 Standby Input/Output PCIE_WAKE_N
Input- Wake up Event from PCI-E
Bus
GPIOE43 Standby Input/Output PME_N Intput- PME from PCI Bus
GPIOE44/SCI Standby Input/Output SUPER IO_PME_N
Output- Active Low to generate a
PME to the 6300ESB ICH
GPIOE45/LED Standby Input/Output PME_PCIX_N Input- PME from PCI-X Bus
GPIO50/DCDM_N Standby Input/Output NWY_DIS_N
Output- Active Low to disable
Intel 82570EI
GPIO51/DSRM_N Standby Input/Output KNI_DIS_N
Output – Active low to disable
Kenai-II
GPIO52/CTSM/XCS1 Standby Input/Output FRU_LEDSEL_N Output – FRU LED Selection
GPIO54/SINM Standby Input/Output MROMB_PRESENT_N
Input- Active Low when ZCR card
detect
GPO60/WDO_N Standby Output MBMC_RST_BTN_N
Output- Active Low to reset
system
GPO61/SMBSA Standby Output
SUPER
IO_SMBUS_ADDR
SMBus slave address (SMBSA)
select – pulled to ground with
10K resistor.
GPO62/LFCLK Standby Output TP_SIO_45 Unused
GPEXC/GPIO56 Standby Output SUPER IO_SERIAL_CLK1
Output- Serial Clock to Port 80
circuit
GPEXD/GPIO57 Standby Input/Output SUPER IO_SERIAL_DAT
Output- Serial data to Port 80
circuit/FRU LED circuit
GPEXC2 / LMPCLK Standby Output SUPER IO_SERIAL_CLK2
Output- Serial Clock to FRU LED
circuit
LED1 Standby Output FP_PWR_LED_N Output- Power LED