Xerox 4540 Service Manual - Page 246
Power-On Sequence, E-1
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FIGURE E-1 Power-On Sequence 0ms 250ms POWER ON CONDITION SOUTH_RPWRON SOUTH_PWRON_L PS[0,1,2]_ENABLE_L t_NEXT_RAIL PS[0,1,2]_POWEROK_L t_PSON_ON_DELAY HS_ENABLE MAIN_HOTSWAP_GOOD [3P3V, 5V]_ENABLE MINUS12V_ENABLE_L 3P3V_POWER_GOOD 5V_POWER_GOOD [1P8V, 2P5V, DDR]_ENABLE DDR_[A,B]_POWERGOOD_L 1_8V_POWERGOOD 2_5V_POWERGOOD PROC[0,1]_CORE_ENABLE P[0,1]_CORE_POWERGOOD [1P2V, 1P5V]_ENABLE 1P2V_POWER_GOOD 1_5V_POWERGOOD ALL_POWERGOOD 500ms 750ms t_NEXT_RAIL t_HOTSWAP_GOOD t_NEXT_RAIL t_ATH26_DELAY t_SIL20C2_DELAY t_NEXT_RAIL t_NEXT_RAIL t_DDR_DELAY t_LTC3025_DELAY t_IPM12_DELAY t_NEXT_RAIL t_VRM_DELAY t_NEXT_RAIL t_SIL20C2_DELAY t_IPM12_DELAY t_RESET_DELAY t_RESET_DELAY E-2 Sun Fire X4500/X4540 Server Service Manual • May 2010
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E-2
Sun Fire X4500/X4540 Server Service Manual
•
May 2010
FIGURE E-1
Power-On Sequence
t_RESET_DELAY
t_RESET_DELAY
t_IPM12_DELAY
t_SIL20C2_DELAY
t_NEXT_RAIL
t_VRM_DELAY
t_NEXT_RAIL
t_IPM12_DELAY
t_LTC3025_DELAY
t_DDR_DELAY
t_NEXT_RAIL
t_NEXT_RAIL
t_SIL20C2_DELAY
t_ATH26_DELAY
t_NEXT_RAIL
t_HOTSWAP_GOOD
t_NEXT_RAIL
t_PSON_ON_DELAY
t_NEXT_RAIL
POWER ON CONDITION
0ms
250ms
500ms
750ms
SOUTH_RPWRON
SOUTH_PWRON_L
PS[0,1,2]_ENABLE_L
PS[0,1,2]_POWEROK_L
HS_ENABLE
MAIN_HOTSWAP_GOOD
[3P3V, 5V]_ENABLE
MINUS12V_ENABLE_L
3P3V_POWER_GOOD
5V_POWER_GOOD
[1P8V, 2P5V, DDR]_ENABLE
DDR_[A,B]_POWERGOOD_L
1_8V_POWERGOOD
2_5V_POWERGOOD
PROC[0,1]_CORE_ENABLE
P[0,1]_CORE_POWERGOOD
[1P2V, 1P5V]_ENABLE
1P2V_POWER_GOOD
1_5V_POWERGOOD
ALL_POWERGOOD