Datasheet

1U Server Chassis SR1300 Hot-Swap SCSI Backplane
Revision 1.2
Intel order number A94544-004
33
6.3.10 Local I
2
C* EEPROM and Temperature Sensor
An I
2
C bus temperature sensor is connected to the micro-controller on a private I
2
C bus. Micro-
controller programming implements the private I
2
C connection by explicitly setting and clearing
appropriate clock and data signals, to emulate an I
2
C-like interface to the sensor. Temperature
information is made available to other devices in the chassis using Enclosure Services
messages. A Dallas* DS1624 Serial EEPROM/Temperature Sensor implements this function.
The EEPROM stores the Field Replaceable Unit (FRU) information for the backplane.
6.3.11 Power Connector
The SCSI backplane provides power to the three drive bays, supporting up to three hard disk
drives or two hard disk drives, and the optional floppy/CDROM module. A 6-pin power cable is
routed from the power distribution board and plugs into a 2 x 3 shrouded plastic PC power
connector (Molex: 39-29-9066) on the SCSI backplane. The following table shows the power
connector pinout.
Table 20. SCSI Backplane Power Connector Pinout
Pin Name Pin Name
1 GND 4 +12V
2 GND 5 +12V
3 +5V 6 Reserved
6.3.12 Server Baseboards SE7500WV2 and SE7501WV2 to SCSI Devices
A 68-pin SCSI cable is used to interface the SCSI backplane with either the on-board SCSI
channel of the server boards SE7500WV2 and SE7501WV2, or an add-in PCI SCSI controller
installed on the PCI riser card.
(AMP: 6-316173-7)
Figure 20. 68-Pin SCSI Cable Connector