參數(shù)資料
型號: 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
文件頁數(shù): 29/193頁
文件大?。?/td> 2990K
代理商: 82845GV
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Intel
82845G/82845GL/82845GV GMCH Datasheet
29
Signal Description
2.4
AGP Interface Signals
2.4.1
AGP Addressing Signals
Note:
The above table contains two mechanisms to queue requests by the AGP master. Note that the
master can only use one mechanism. When PIPE# is used to queue addresses, the master is not
allowed to queue addresses using the sideband (SB) bus. During configuration time, if the master
indicates that it can use either mechanism, the configuration software indicates which mechanism
the master will use. Once this choice has been made, the master continues to use the mechanism
selected until the master is reset (and reprogrammed) to use the other mode. This change of modes
is not a dynamic mechanism but rather a static decision when the device is first being configured
after reset.
2.4.2
AGP Flow Control Signals
Signal Name
Type
Description
GPIPE#
I
AGP
Pipelined Read:
This signal
is asserted by the current master to indicate a full
width address is to be queued by the target. The master queues one request each
rising clock edge while GPIPE# is asserted. When GPIPE# is deasserted, no new
requests are queued across the GAD bus.
GPIPE# is a sustained tri-state signal from the master
(graphics controller) and is
an input to the GMCH.
GSBA[7:0]
I
AGP
Sideband Address:
This bus
provides an additional bus to pass addresses and
commands to the GMCH from the AGP master.
Signal Name
Type
Description
GRBF#
I
AGP
Read Buffer Full:
This signal indicates if the master is ready to accept previously
requested low priority read data. When GRBF# is asserted, the GMCH is not
allowed to return low priority read data to the AGP master. GRBF# is only
sampled at the beginning of a cycle.
If the AGP master is always ready to accept return read data, it is not required to
implement this signal.
GWBF#
I
AGP
Write Buffer Full:
This signal indicates if the master is ready to accept fast write
data from the GMCH. When GWBF# is asserted, the GMCH is not allowed to
drive fast write data to the AGP master. GWBF# is only sampled at the beginning
of a cycle.
If the AGP master is always ready to accept fast write data, it is not required to
implement this signal.
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)