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5-12 Hardware Specifications Rev.A
Confidential
+3.3VSB
It can generate +3.3VSB by the series regulator from +5VSB (as long as the main switch of the
power supply unit is on, this electric current is flowing although the power is off).
Output electric current: 50mA (maximum)
Regulator: SII S-814A33AMC-BCX
VTT
1.5V power supply for the AGTL+ bus of the CPU. It is generated by the series regulator from
+3.3V.
Electric current output: 4A (maximum)
Regulator: Linear Technology LT1585CT-1.5
PWRGOOD Signal
The PWRGOOD (Power Confirmation Signal) signal from the system is activated after the
VCORE power is stable. After the activation of the PWRGOOD signal, the system starts its
operation.
T1: 1ms (min.) 10ms (Typ.)
5-8 PWRGOOD signal timing
Peripheral Ethernet Controller Circuits
5-9 Block chart of peripheral Ethernet circuits
+5V,+3.3V
PS_OK
V
CORE
PWRGOOD
/PWROK
T1
Ethernet Controller
RTL8139B(L)
PCI Bus
25MHzCrystal
Transformer
RJ45
LAN Wake Up