D-4
SAS3-842TQ Backplane
User's Guide
D-6 Front Connector Pin Definitions
#3.
CPLD Upgrade Port
The CPLD programming port, designated
J11, is used only by the manufacturer to
upgrade the CPLD.
#4. CPLD Chip
The CPLD is an enclosure management
chip that supports the SGPIO and LED
management.
Sideband Connectors
(Sideband#1 and Sideband#2)
Pin Definition
Pin Definition
2
SDataIn
(SGPIO Data
In)
1
N/C
4
SDataOut
(SGPIO Data
Out)
3
GND
6
GND
5
SLoad
(SGPIO Load)
8
N/C
7
SClock
(SGPIO Clock)
#1 - 2. Sideband Connectors
These are the SGPIO sideband connectors
for SAS/SATA. SGPIO Sideband #1,
designated J1, is for SAS/SATA Ports #0-3
and SGPIO Sideband #2, designated J6, is
for SAS/SATA Port #4.
#5. - 6. Backplane Main Power Connectors
The 4-pin connectors, designated JPW1
and JPW2, provide power to the backplane.
See the table on the right for pin definitions.
#7. - 11. MiniSAS 7-Pin Connectors
The SAS ports are used to connect the SAS
drive cables. The five ports are designated
J6, J7, J8, J9, and J10. Each port is also
compatible with SATA drives. However,
mixing SAS and SATA drives in the same
enclosure is not recommended.
Backplane
Main Power
4-Pin Connector
Pin# Definition
1
+12V
2 and 3
Ground
4
+5V
