ADLINK aTCA-6155 - Manual (Page 34)

20 Functional Description
GPIO List
The following table summarizes GPIO usage on ICH10R:
ICH10R I/O Signal Description
GPI[2] Input IOH_ERR-L IOH Error output signals
GPI[8] Input QPI_TTL_CATERR-L
CPU Indicates that the system
has experienced a catastrophic
error and cannot continue to
operate
GPI[23] Output USR_LED User defined LED
GPI[27] Output QPI_FREQSEL0
QuickPath Interconnect
Frequency Strapping Options
GPI[28] Output QPI_FREQSEL1
QuickPath Interconnect
Frequency Strapping Options
GPI[29] Output FM_CPU0_LVDDR3_EN
DDR3L DIMM voltage control
(DIMM A/B/C)
GPI[30] Output FM_CPU1_LVDDR3_EN
DDR3L DIMM voltage control
(DIMM D/E/F)
GPI[32] Output POSTOK-L POST OK to IPMC
GPI[52] Output ICH_SMBUS_MUX0 DDR SMBUS Multiplier control
GPI[53] Output ICH_SMBUS_MUX1 DDR SMBUS Multiplier control
GPI[56] Output QPI_FSEL_PWRGD-L
IOH Hard Reset Triggers a
Power-Up Reset control