Compaq AlphaServer ES40 User Manual

D-40 Compaq AlphaServer ES40 Service Guide
D.16 DPR Power Supply Status Registers
The RMC reads nine bytes of information from each of the three power
supplies. The first byte is read from an I/O expander port, the second
four bytes and the last four bytes are read from the A–D converter.
Table D–15 Nine Bytes Read from Power Supply
DPR Location Definition
DB/E4/ED Reads I/O expander on Power Supply 0, 1, 2
Bit 0 PS_ID0_L
1 PS_ID1_L
2 Reserved (Pulled up so bit is always enabled)
3 Thermal_Shutdown_H
4:7 Tied to High within PS
DC/E5/EE 3.3V_current. Each step equals 0.255 (0xFF x 0.33203 = 85A)
DD/E6/EF 5 V_current. Each step equals 0.255 (0xFF x 0.33203 = 85A)
DE/E7/F0 12 V_current. Each step equals 0.033 (0xFF x 0.07813 = 20A)
DF/E8/F1 Fan_Speed (0x8B = 7 V)
E0/E9/F2
AC_INPUT value in hex. Each step equals 1.07422VAC
(0xFF x 1.07422 = 275VAC)
E1/EA/F3 Power_supply_internal_temperature (hot)
Byte represents a temp value
1 bit = 0.756• C
E2/EB/F4
Power_supply_inlet_temperature
1 bit = 0.266• C
E3/EC/F5 Spare
NOTE: The DPR locations refer to power supplies. For example, DB/E4/ED = power
supply 0/1/2. The same is true for all locations listed in the table.

Compaq AlphaServer ES40 Specifications

General

Brand	Compaq
Model	AlphaServer ES40
Category	Server
Language	English