
Appendix E
Power Reset and Initialization Sequences
E-5
FIGURE E-2
Power-Off Sequence
TABLE E-2
Power-Off Sequence Timing Parameters
Symbol
Parameter
Value (in ms)
t_NEXT_RAIL
(fault condition)
Delay from one rail Enable deassertion to next rail
Enable deassertion after a fault condition.
1 ms
t_ NEXT_RAIL
(normal power-
down)
Delay from one rail Enable deassertion to next rail
Enable deassertion after a power-down initiated by
the Host/SP.
20 ms
t_NEXT_RAIL
t_NEXT_RAIL
t_NEXT_RAIL
t_NEXT_RAIL
t_NEXT_RAIL
t_NEXT_RAIL
Immediate Reset
t_NEXT_RAIL
POWER OFF CONDITION
PS[0,1,2]_FAIL
PS[0,1,2]_PRESENT_L
MAIN_HOTSWAP_GOOD
Any POWER_GOOD signal
SOUTH_RPWRON
SOUTH_PWRON_L
[1P2V, 1P5V]_ENABLE
ALL_POWERGOOD (Reset)
PROC[0,1]_CORE_ENABLE
[1P8V, 2P5V, DDR]_ENABLE
[3P3V, 5V]_ENABLE
MINUS12V_ENABLE_L
HS_ENABLE
PS[0,1,2]_ENABLE_L
Summary of Contents for 4540 - Phaser Copystation
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Page 264: ...Index 4 Sun Fire X4500 X4540 Server Service Manual May 2010...