參數(shù)資料
型號(hào)： FW82801E
廠商： Intel Corp.
英文描述： Intel 82801E Communications I/O Controller Hub (C-ICH)
中文描述： 英特爾82801E通訊I / O控制器集線器（丙，出血）
文件頁數(shù)： 48/84頁
文件大?。?/td> 1196K
代理商： FW82801E
Intel
82801E C-ICH
48
Advance Information Datasheet
3.2.20
Power and Ground
GPIO[21]
O
Fixed as Output only. Main power well.
GPIO[20:18]
O
Fixed as Output only. Main power well.
GPIO[17:16]
O
Fixed as Output only. Main Power Well. Can instead be used for PC/PCI
GNT[A:B]#. GPIO[17] can also alternatively be used for PCI GNT[5]#. Integrated
pull-up resistor.
GPIO[15:14]
I
Not implemented.
GPIO[13:12]
I
Fixed as Input only. Main Power Well. Not muxed.
GPIO[11]
I
Fixed as Input only. Main Power Well. Can instead be used for SMBALERT#.
GPIO[10:9]
I
Not implemented.
GPIO[8]
I
Fixed as Input only. Main Power Well. Not muxed.
GPIO[7]
I
Fixed as Input only. Main power well. Not muxed.
GPIO[6]
I
Fixed as Input only. Main power well.
GPIO[5:4]
I
Fixed as Input only. Main power well. Can be used instead as PIRQ[G:H]#.
GPIO[3:2]
Reserved.
GPIO[1:0]
I
Fixed as Input only. Main Power Well. Can instead be used for PC/PCI
REQ[A:B]#. GPIO[1] can also alternatively be used for PCI REQ[5]#.
Table 26. Power and Ground Signals
Name
Description
HUBREF
0.9 V reference for the hub interface.
V5REF
Reference for 5 V tolerance on Core well inputs.
VBIAS
RTC well bias voltage. The DC reference voltage applied to this pin sets a current that is
mirrored throughout the oscillator and buffer circuitry. See
“External RTC Circuitry” on
page 50.
Vcc1_8
1.8 V supply for Core well logic.
Vcc3_3
3.3 V supply for Core well I/O buffers.
VccRTC
3.3 V (can drop to 2.0 V min. in G3 state) supply for the RTC well. This power is not
expected to be shut off unless the RTC battery is removed or completely drained.
NOTE:
Implementations should not attempt to clear CMOS by using a jumper to pull
VccRTC low. Clearing CMOS in an 82801E C-ICH-based platform can be done
by using a jumper on RTCRST# or GPI, or using SAFEMODE strap.
V_CPU_IO
Powered by the same supply as the processor I/O voltage. This supply is used to drive the
processor interface outputs.
Vss
Ground.
Table 25. General Purpose I/O Signals (Sheet 2 of 2)
Name
Type
Description
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