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IPMI Controller: I/O Interface
Katana
®
752i User’s Manual 10006024-04
11-4
I/O INTERFACE
The Zircon PM provides 24 user-definable input/output (I/O) pins. The following table
shows how the Katana
®
752i implements these pins.
Table 11-1: Zircon PM General Purpose I/O Pin Functions
Zircon PM Pin: Signal Name: Function:
GPIO0 TEMP1_OS unused
GPIO1 TEMP2_OS unused
GPIO[2:3] – unused
GPIO4 750GL1_IPMI_RST_R* active low IPMI reset input from 750GL
processor
GPIO5 – unused
GPIO6 IPMI_TIMEROUT_D unused
GPIO7 – unused
GPIO8 POST_FAULT active high input that signals a system
firmware error
GPIO9 – unused
GPIO10 I2C_holdoff active high input that signals Zircon PM off
the #1 I
2
C bus
GPIO11 750GL1_WD_LATCH active high input that signals a watchdog
expiration event on 750GL processor
GPIO12 – unused
GPIO13 HS_FAULT_R* active low output that shuts power down
to the board via the Hot Swap controller
GPIO14 – unused
GPIO[15:19] GA[4:0] Geographical Address inputs from J2
connector
GPIO20 – unused
GPIO[21:23] 750GL_TEMP_INT* unused