C-4
SC828 Chassis Manual
C-5 Front Connector and Pin Definitions
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 definitions.
1. CD-ROM/Floppy 4-Pin Connectors
The 4-pin connectors, designated JP105 and
JP106, provide power to the CD-ROM and
floppy drives. See the table on the right for
pin definitions.
CD-ROM/
FDD Power
4-Pin Connector
(JP17 and JP18)
Pin# Definition
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 defi
-
nitions.
I
2
C Connector
Pin Definitions
(JP44 and JP45)
Pin# Definition
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 # Definition
Pin # Definition
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