2-2
SAS-216A Backplane User's Guide
2-2 Front Connector and Pin Definitions
1. Upgrade Connectors
The upgrade connectors are designated JP69,
JP78 and JP115 are used for manufacturer's
diagnostic purposes only.
2. - 7. I
2
C Connectors
The I
2
C Connectors, designated JP37, JP95,
JP52, JP96, JP115 and JP116 are used to
monitor HDD activity and status. See the table
on the right for pin definitions.
I
2
C Connector
Pin Definitions
(JP37, JP95, JP52, JP96,
JP115 and JP116
Pin# Definition
1
Data
2
Ground
3
Clock
4
No Connection
Backplane
Main Power
4-Pin Connector
(JP10, JP13, JP46,
JP48, JP109 and JP110)
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
8. Backplane Main Power Connectors
The 4-pin connectors, designated JP10, JP13,
JP46, JP48, JP109 and JP110 provide power
to the backplane. See the table on the right for
pin definitions.
9. - 14. SAS IN Ports (Sideband included)
The SAS ports are used to connect the SAS
drive cables. The six SAS IN ports are des-
ignated #JSM1 - #JSM6. Each port is also
compatible with SATA drives.
Sideband Definitions
(JSM1 - JSM6)
Pin # Definition
Pin # Definition
A11
SGPIO:
SDIN
I
2
C:
Backplane
Addressing
(SB5)
B11
Controller ID
(SB6)
A12
SGPIO:
SDOUT
I
2
C:
Reset
(SB4)
B10
GND (SB2)
A9
GND (SB3)
B9
SGPIO:
SLOAD
I
2
C:
SDA
(SB1)
A8
Backplane
ID (SB7)
B8
SGPIO:
SCLOCK
I
2
C:
SCL
(SB0)
