參數(shù)資料
型號(hào): 82845GV
廠商: INTEL CORP
元件分類: 外設(shè)及接口
英文描述: Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)
中文描述: MULTIFUNCTION PERIPHERAL, PBGA760
封裝: 37.50 X 37.50 MM, 1 MM PITCH, FLIP CHIP, BGA-760
文件頁(yè)數(shù): 36/193頁(yè)
文件大小: 2990K
代理商: 82845GV
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Signal Description
36
Intel
82845G/82845GL/82845GV GMCH Datasheet
2.7
Clocks, Reset, and Miscellaneous Signals
2.8
RCOMP, VREF, VSWING Signals
Signal Name
Type
Description
HCLKP
HCLKN
I
CMOS
Differential Host Clock In:
These pins receive a low voltage differential host clock
from the external clock synthesizer.
GCLKIN
I
LVTTL
66 MHz Clock In:
This pin receives a 66 MHz clock from the clock synthesizer.
This clock is used by AGP and hub interface clock domains.
DREFCLK
I
LVTTL
Display Clock Input:
This pin provides a 48 MHz input clock to the Display PLL
that is used for 2D/Video/Flat Panel and DAC.
RSTIN#
I
LVTTL
Reset In:
When asserted, this signal asynchronously resets the GMCH logic. This
signal is connected to the PCIRST# output of the Intel
ICH4. All AGP/PCI output
and bi-directional signals will also tri-state compliant to
PCI Local Bus
Specification, Revision 2.0
and
PCI Local Bus Specification, Revision 2.1
.
PWROK
I
3.3 V
GPIO
Power OK:
When asserted, PWROK is an indication to the GMCH that the core
power and GCLKIN have been stable for at least 10 μs.
TESTIN#
I
1.5 V
CMOS
Test Input:
This pin is used for manufacturing and board lever test purposes.
Signal Name
Type
Description
HDVREF_[2:0]
I
Host Data Reference Voltage:
Reference voltage input for the data signals of the
Host AGTL+ interface.
HA_VREF
I
Host Address Reference Voltage:
Reference voltage input for the address
signals of the Host AGTL+ interface.
HCC_VREF
I
Host Common Clock Reference Voltage:
Reference voltage input for the
common clock signals of the Host AGTL+ interface.
HX_RCOMP
HY_RCOMP
I/O
CMOS
Host RCOMP:
These pins are used to calibrate the Host AGTL+ I/O buffers.
HX_SWING
HY_SWING
I
Host Voltage Swing:
These pins provide a reference voltage used by the PSB
RCOMP circuit. HX_SWING is used for the signals handled by HX_RCOMP, and
HY_SWING is used for the signals handled by HY_RCOMP.
SM_VREF
I
Memory Reference Voltage:
Reference voltage input for DQ, DQS &
SRCVEN_IN#.
SMXRCOMP
SMYRCOMP
I/O
CMOS
Memory RCOMP:
These pins are used to calibrate the memory I/O buffers.
AGP_VREF
I
AGP Reference:
The reference voltage for the AGP/DVO I/O buffers is 0.75 V.
AGP_RCOMP
I/O
CMOS
Compensation for AGP:
This signal is used to calibrate the AGP/DVO buffers.
This signal should be connected to ground through a 40
pull-down resistor.
HI_VREF
I
HI Reference:
Reference voltage input for the hub interface.
HI_RCOMP
I/O
CMOS
Compensation for HI:
This signal is used to calibrate the hub interface I/O
buffers. This signal should be connected to 1.5 V through a 68.1
1% pull-up
resistor
HI_SWING
I
HI Voltage Swing:
This signal provides a reference voltage used by the
HI_RCOMP circuit.
相關(guān)PDF資料
PDF描述
82845Gx Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)
82845MP Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)
82845Mx Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)
82845MZ Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)
82845PE 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
82845GX 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)
82845MP 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)
82845MX 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)
82845MZ 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)
82845PE 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)