參數(shù)資料
型號： 845GE
廠商： Intel Corp.
英文描述： 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)
中文描述： 82845GE圖形和內(nèi)存控制器中樞（GMCH）和82845PE內(nèi)存控制器中樞（MCH）
文件頁數(shù)： 35/176頁
文件大小： 2661K
代理商： 845GE
Intel
82845GE/82845PE Datasheet
35
Signal Description
Table 2-1
shows the VTT/VDD, VREF, RCOMP, and VSWING levels for the various interfaces.
NOTE:
1. For the Pentium 4 processor with 512-KB L2 Cache on 0.13 Micron Process, VTT range is 1.29 V–1.525 V.
For the Pentium 4 processor with 256-KB L2 Cache, VTT range is 1.535 V– 1.75 V
2. Refer to the
Intel
Pentium
4 Processor in 478-Pin Package and Intel
845GE/845PE Chipset Platform
Design Guide
for details.
2.9
Power and Ground Signals
Table 2-1. Voltage Levels and RCOMP for Various Interfaces
Interface
VTT/VDD
(Volts)
VREF
(Volts)
RCOMP
(
)
RCOMP
term
Vswing
(Volts)
Core
1.5
NA
NA
Note 2
NA
AGTL+
1.15–-1.75
(1)
2/3 * VTT
25
1/3*VTT
AGP/DVO
1.5
0.5 * VDD
40
NA
HI1.5
1.5
0.35
69
0.7
DDR - SSTL_2
1.25/2.5
0.5 * VDD
60
NA
Signal Name
Description
VCC
VCC for 1.5 V core.
VSS
GND supply.
VCCAGP
VCC for AGP – 1.5 V.
VCCA_FSB
Analog Vcc for the Host PLL – 1.5 V. This supply requires special filtering. Refer to the
Intel
Pentium
4 Processor in 478-Pin Package and Intel
845GE/845PE Chipset
Platform Design Guide
for details.
VTTFSB
VTT supply for PSB, having a range of 1.15 V–1.75 V.
VTT edge cap connection supply. Do not connect to MB VTT supply. Refer to the
Intel
Pentium
4 Processor in 478-Pin Package and Intel
845GE/845PE Chipset Platform
Design Guide
for implementation.
VTTDECAP
VCCA_HI
Analog VCC for the HI/AGP PLL – 1.5 V.
Does not
require special filtering.
VCCHL
VCC for Hub Interface – 1.5 V.
VCCA_DPLL
(82845GE only)
Analog VCC for the Display PLL – 1.5 V. This supply requires special filtering. Refer to the
Intel
Pentium
4 Processor in 478-Pin Package and Intel
845GE/845PE Chipset
Platform Design Guide
for details.
VCCA_DAC
(82845GE only)
Analog VCC for the DAC – 1.5 V. Refer to the
Intel
Pentium
4 Processor in 478-Pin
Package and Intel
845GE/845PE Chipset Platform Design Guide
for supply requirements.
VSSA_DAC
(82845GE only)
Analog VSS for the DAC. This supply should go directly to motherboard ground.
VCCGPIO
VCC for GPIO – 3.3 V.
VCCSM
VCC for System Memory – 2.5 V for DDR.
VCCA_SM
Analog VCC for System Memory DLL – 1.5 V supply requires special filtering. Refer to the
Intel
Pentium
4 Processor in 478-Pin Package and Intel
845GE/845PE Chipset
Platform Design Guide
for details.
VCCQSM
Quiet VCC for System Memory – 2.5 V for DDR. Supply requires special filtering. Refer to
the
Intel
Pentium
4 Processor in 478-Pin Package and Intel
845GE/845PE Chipset
Platform Design Guide
for details.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
845GE MAX-L 制造商:Micro-Star International 功能描述:845GE P4/CELERON 533FSB ATX - Bulk
845GEM-L 制造商:Micro-Star International 功能描述:845GEM-L P4 MATX HYPER-T - Bulk
845GL 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)
845GLMS-L 制造商:Micro-Star International 功能描述:845GL UATX P4/CEL 400FSB - Bulk
845GR 制造商:SPC 功能描述:New
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