Intel SPSH4 - Server Platform - 0 MB RAM, Technical Product Specification

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SPSH4 Server SystemTechnical Product Specification
Revision 1.11
Intel reference number 10736
55
6.3.7 Microcontroller
The microcontroller is an 80C652 microcontroller with a built-in I
2
C interface. This provides the
intelligence for the LVD/SE SCSI Backplane. The 80C652 microcontroller uses Flash for
program code storage, and static RAM for program variables and buffers.
6.3.8 Device SCSI ID
Each device on a SCSI bus must have a unique SCSI ID. The 5 x 1.0” LVD/SE SCSI backplane
device SCSI ID is dependant on whether it is configured as a primary or a secondary backplane.
This configuration is defined by the logic of pin 1 on the I
2
C connector (J2A1).
Table 45: SCSI ID Assignments
Device
SCSI ID as Primary Backplane
I
2
C connector (J2A1) pin1=1
SCSI ID as Primary Backplane
I
2
C connector (J2A1) pin1=0
Drive 1 0x0H 0x8H
Drive 2 0x1H 0x9H
Drive 3 0x2H 0xAH
Drive 4 0x3H 0xBH
Drive 5 0x4H 0xCH
SAF-TE
Controller
0x6H 0x5H
6.3.9 Hard Drive Activity LED
Each SCSI drive turns on a green LED when it is accessed. The LEDs are 4-terminal dual-color
(yellow and green) lights that are physically located on the backplane.
Table 46: Hard Drive Activity LED
Drive HSBP LED Activated LED Designator LED Color
1 1 DS5A1 Green
2 2 DS5B1 Green
3 3 DS5C1 Green
4 4 DS5D1 Green
5 5 DS5E1 Green