User`s manual

C-4
SC828 Chassis Manual
C-5 Front Connector and Pin Denitions
3 and 4. Sideband Headers
The sideband headers are designated JP51
and JP52. For SES-2 to work properly, you
must connect an 8-pin sideband cable. See the
table to the right for pin denitions.
1. CD-ROM/Floppy 4-Pin Connectors
The 4-pin connectors, designated JP105 and
JP106, provide power to the CD-ROM and
oppy drives. See the table on the right for
pin denitions.
CD-ROM/
FDD Power
4-Pin Connector
(JP17 and JP18)
Pin# Denition
1 +5V
2 and 3 Ground
4 +12V
5 and 6. I
2
C Connectors
The I
2
C Connectors, designated JP44 and
JP45, are used to monitor HDD activity and
status. See the table on the right for pin de-
nitions.
I
2
C Connector
Pin Denitions
(JP44 and JP45)
Pin# Denition
1 Data
2 Ground
3 Clock
4 No Connection
2. Upgrade Connector
The Upgrade connector, designated JP46, is
used for manufacturer's diagnostic purposes
only.
Sideband Headers
(JP51 and JP52)
Pin # Denition Pin # Denition
2 SGPIO:
SDIN
I
2
C:
Backplane
Addressing
(SB5)
1 Controller ID
(SB6)
4 SGPIO:
SDOUT
I
2
C: Reset
(SB4)
3 GND (SB2)
6 GND (SB3) 5 SGPIO:
SLOAD
I
2
C:SDA (SB1)
8 Backplane
ID (SB7)
7 SGPIO:
SCLOCK
I
2
C:SCL (SB0)
10 No Connec-
tion
9 No Connection