FW82801DB S L66K Intel, FW82801DB S L66K Datasheet - Page 57
FW82801DB S L66K
Manufacturer Part Number
FW82801DB S L66K
Description
Manufacturer
Intel
Datasheet
1.FW82801DB_S_L66K.pdf
(587 pages)
Specifications of FW82801DB S L66K
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Intel
Pin States
3.1
Intel
®
Table 3-1. Intel
82801DB ICH4 Datasheet
®
This chapter describes the describes the system power planes for the ICH4. In addition, the ICH4
power planes and reset pin states for various signals are presented.
Power Planes
ICH4 Power Planes and
Hub Interface Logic
(3.3 V Standby)
(1.5 V Standby)
(1.5 V or 1.8 V)
Resume Logic
(0.8 ~ 1.75 V)
Resume I/O
Main Logic
®
Main I/O
CPU I/F
(3.3 V)
(1.5 V)
Plane
ICH4 System Power Planes
RTC
Vcc3_3: Powered by the main power supply. When the system is in the S3, S4, S5, or
G3 state, this plane is assumed to be shut off.
Vcc1_5: Powered by the main power supply. When the system is in the S3, S4, S5, or
G3 state, this plane is assumed to be shut off.
VccSUS3_3: Powered by the main power supply in S0–S1 states. Powered by the
trickle power supply when the system is in the S3, S4, S5, state. Assumed to be shut off
only when in the G3 state (system is unplugged).
VccSUS1_5: Powered by the main power supply in S0–S1 states. Powered by the
trickle power supply when the system is in the S3, S4, S5, state. Assumed to be shut off
only when in the G3 state (system is unplugged).
V_CPU_IO: Powered by the main power supply via CPU voltage regulator. When the
system is in the S3, S4, S5, or G3 state, this plane is assumed to be shut off.
VccHI: Powered by the main power supply. Assumed to be 1.5 V when operating in
Hub Interface 1.5 mode and 1.8 V when operating in Hub Interface 1.0 mode. When the
system is in the S3, S4, S5, or G3 state, this plane is assumed to be shut off.
VccRTC: When other power is available (from the main supply), external diode
coupling will provide power to reduce the drain on the RTC battery. Assumed to operate
from 3.3 V down to 2.0 V.
Intel
Description
®
ICH4 Power Planes and Pin States
3
57
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