Power-On Beep - Sun Microsystems Sun Blade 100 Service Manual

Tolerance needs to keep at +3% ~ -3% with dynamic current load
of 1A to 12.5A
85% efficiency at typical load (7A), 82% at light load (1.3A)
The voltage sensor should be routed to the farthest CPU power pin input.
Note – Since the CPU has only four VID pins, VID4 on the regulator side needs to
be tied to ground.
TABLE C-4
VID4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
C.5.2.2

Power-On Beep

The M1535D SouthBridge provides a speaker output to the audio codec for output to
an internal speaker. This speaker output has two different beep functions, one is
write-beep function that will beep one to three beeps depending on the number of
writes to the register and the other is a periodic four-beep function. This is all
controlled by the software: the OpenBoot PROM must program the M1535D to send
a "beep" sound at power on.
VRM Voltage ID Codes
VID3 VID2
1 1
1 1
1 1
1 1
1 0
1 0
1 0
1 0
0 1
0 1
0 1
0 1
0 0
0 0
0 0
0 0
VID1 VID0
1 1
1 0
0 1
0 0
1 1
1 0
0 1
0 0
1 1
1 0
0 1
0 0
1 1
1 0
0 1
0 0
Appendix C Functional Description
VDC
(output)
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
C-13