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C-4
Motherboard Pinout Data
Table C-2. Motherboard Signal Definitions
Signal
Definition
-KEY-
Keyed hole in connector.
-12
- 12 volt supply.
-19
- 19 volt supply.
-2
- 2 volt supply.
12
12 volt supply.
12MM
12 volt supply to mass storage devices only.
16
16 volt bias supply voltage.
19
19 volt supply.
3.85
3.85 volt supply.
5
5 volt supply.
5BB
5 volt battery backup.
6.7
6.7 volt supply.
AC+
25 KHz ac sine wave from power supply.
AC-
25 KHz ac sine wave from power supply.
CCLK
Baud rate generator on SCM board for 110 backplane.
CS-12
Control sense for - 12 volt supply.
CS-2
Control sense for - 2 volt supply.
CS-2G
Control sense for - 2 volt supply ground.
CS12
Control sense for 12 volt supply.
CS3.85
Control sense for 3.85 volt supply.
CS5
Control sense for 5 volt supply.
CS6.7
Control sense for 6.7 volt supply.
CSGND
Control sense for 5 volt supply ground.
DGND
Dirty ground return.
FANCTL
Fan control. Connected to PST.
FANF
Power to processor stack fan (negative voltage).
FANGND
Fan ground return.
FANI
Power to 110 card cage fan (negative voltage).
FANP
Power to power supply fan (negative voltage).
GND
Ground plane of motherboard.
LOLINE
Low line indication.
MS-12
Monitor sense for -12 volt under/over voltage.
MS-19
Monitor sense for - 19 volt under/over voltage.
MS-2
Monitor sense for - 2 volt under/over voltage.
MS12
Monitor sense for 12 volt under/over voltage.
MS19
Monitor sense for 19 volt under/over voltage.
MS3.85
Monitor sense for 3.85 volt under/over voltage.
MS5
Monitor sense for 5 volt under/over voltage.
MS6.7
Monitor sense for 6.7 volt under/over voltage.
NARQ
HP-CIO card requests attention (negative true).
NBR
110 bus burst mode DMA request (negative true).
NDEND
110 bus device end (negative true).
NDO
Door open (negative true). Wired OR of NPDO and NIDO.
NDOORLED
Doop open (negative true).
NFANHI
Power supply fan at highest speed (negative true).
NFLG
110 bus ready for data (negative true).
NIC1
110 bus interface control bit 1 (negative true).
NIC2
110 bus interface control bit 2 (negative true).
NIC3
110 bus interface control bit 3 (negative true).
NIC4
110 bus interface control bit 4 (negative true).
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