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9. SYSTEM_POK to JBus-to-PCI-E bridge F_PWR_GOOD is released (causes CPU hard
reset), and vBSC commences with host reset sequence.
5.3
Power
The following list provides an overview of the Sun Netra CP3060 blade server power
rails:
Sun Netra CP3060 blade server derives dual −48V power from the ATCA
■
backplane
Sun Netra CP3060 blade server has on-board or power converters for the
■
following:
■
■
5.3.1
Power Input
The Sun Netra CP3060 blade server is powered from dual-redundant −48 V power
supply inputs from the backplane power connector. It takes redundant −48V as input
and derives the other necessary power using DC-DC converters. The design
complies to the ATCA power distribution specification such as:
Inrush current limiting /hot-plug capability
■
Input under-voltage, over-voltage, and transient protection
■
EMI filtering for conducted emissions
■
Isolated Management Power
■
External holdup/energy storage capacitors to meet 0V transient for 5msec
■
A/B Feed loss alarm
■
5.3.2
Fuses
As required by the PICMG 3.0 R1.0 specification, the Sun Netra CP3060 blade server
provides fuses on each of the −48V power feeds and on the return (RTN)
connections. The fuses on the return feeds are critical to prevent overcurrent
situations when an O-ring diode in the return path fails. There are eight fuses on the
blade server connected to −48V_A, −48V_B, RET_A, RET_B, EARLY_A, EARLY_B,
ENABLE_A, and ENABLE_B inputs. The fuses are one-time blow type fuse and need
to be replaced when blown.
5-26
Netra CP3060 Board User's Guide • April 2009
−48V to +12V, 3.3V standby, 2.5V standby, 1.2V standby
+12V to 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1.0V, 0.9V
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