User`s manual

D-5
Appendix D SAS-836TQ Backplane Specications
#10., #11., #12., #13. Sideband
Headers
The sideband headers are desig-
nated JP66, JP68, JP75 and JP77.
are for enclosure management
of the SGPIO mode connection.
See the table to the right for pin
denitions.
Sideband Headers
(JP66, JP68, JP75 and JP77)
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
Backplane
Main Power
4-Pin Connector
(JP10, JP13, JP46,
and JP48)
Pin# Denition
1
+12V
2 and 3 Ground
4 +5V
#9. Backplane Main Power Connectors
The 4-pin connectors, designated JP10,
JP13, JP46, and JP48, provide power to the
backplane. See the table on the right for pin
denitions. All four of these connectors must
be used at the same time.
#4. Fan Connectors
The 4-pin connectors, designated JP54, JP56,
JP58 and JP60, provide power to the fans. See
the table on the right for pin denitions. These
4-pin connectors are compatible with 3-pin and
4-pin fans.
Fan Connectors
(JP54, JP56, JP58,
and JP60)
Pin# Denition
1 Ground
2 +12V
3 Tachometer
4 No connection
#5., #6., #7., #8. I
2
C Y-Cable Connectors
The I
2
C Y-cable connectors, designated JP37,
JP52, JP95, and JP96, are for enclosure
management of the I
2
C mode connection.
These connectors are used only if the I
2
C is
not embedded into the sideband connectors.
See the table on the right for pin denitions.
I
2
C Y-Cable
Connector
Pin Denitions
(JP37, JP52, JP95,
and JP96)
Pin# Denition
1 Data
2 Ground
3 Clock
4 No Connection