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845GL Datasheet(PDF) 150 Page - Intel Corporation

Part # 845GL
Description  Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)
PDF  193 Pages
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

845GL Datasheet(HTML) 150 Page - Intel Corporation

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Electrical Characteristics
150
Intel® 82845G/82845GL/82845GV GMCH Datasheet
6.5
DC Parameters
NOTES:
1. HA_VREF/HD_VREF and HCC_VREF are generically referred to as GTLREF throughout the rest of this
document.
2. HI_VREF and HI_SWING are set according to the nominal VCC.
3. The DC specifications are intended solely for DC measurements and do not comprehend any AC noise
components.
Table 6-5. DC Operating Characteristics
Signal Name
Parameter
Min
Nom
Max
Unit
I/O Buffer Supply Voltage
VCC
Core Voltage
1.425
1.5
1.575
V
VCCAGP
AGP I/O Voltage
1.425
1.5
1.575
V
VCCHI
Hub Interface I/O Voltage
1.425
1.5
1.575
V
VCCA_DAC
DAC Supply Voltage
1.425
1.5
1.575
V
VTT
Host AGTL+ Termination
Voltage
1.15
N/A
1.75
V
VCCSM(DDR)
DDR I/O Supply Voltage
2.375
2.5
2.625
V
VCCSM(SDR)
SDR I/O Supply Voltage
3.135
3.3
3.465
V
Reference Voltages
AGP_VREF
AGP Reference Voltage
1/2 VCCAGP
– 2%
1/2 x
VCCAGP
1/2 VCCAGP
+ 2%
V
HI_VREF
Hub Interface Reference
Voltage
0.343
0.35
0.357
V
HI_SWING
Hub Interface Compensation
Reference Voltage
0.686
0.7
0.714
V
HA_VREF/
HD_VREF
Host Address and Data
Reference Voltage
2/3 x VTT – 2%
2/3 x VTT
2/3 x VTT + 2%
V
HX_SWING/
HY_SWING
Host Compensation
Reference Voltage
1/3 x VTT – 2%
1/3 x VTT
1/3 x VTT + 2%
V
HCC_VREF
Host Common Clock
Reference Voltage
2/3 x VTT – 2%
2/3 x VTT
2/3 x VTT + 2%
V
SM_VREF
(DDR)
DDR Reference Voltage
0.5 VCCSM
(DDR) – 2%
1/2 x VCCSM
(DDR)
0.5 VCCSM
(DDR) + 2%
V
SM_VREF
(SDR)
SDR Reference Voltage
0.5 VCCSM
(SDR) – 2%
1/2 x VCCSM
(SDR)
0.5 VCCSM
(SDR) + 2%
V



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