參數(shù)資料
型號(hào)： 82815EM
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù)： 25/163頁
文件大?。?/td> 1049K
代理商： 82815EM
Intel
82815EM GMCH
R
Datasheet
25
2.3.4.
AGP Clocking Signals - Strobes
Signal Name
Type
Description
ADSTB0
I/O
s/t/s
AGP
AD Bus Strobe-0
During 2X Operation:
During 2X operation, this signal provides timing for the
GAD[15:0]
and
GCBE[1:0]#
signals. The agent that is providing the data will drive this
signal.
During 4X Operation:
During 4X operation, this is one-half of a differential strobe pair
that provides timing information for
GAD[15:0]
and
GCBE[1:0]#
signals.
ADSTB0#
I/O
s/t/s
AGP
AD Bus Strobe-0 Compliment
During 2X Operation:
During 2X operation, this signal is not used.
During 4X Operation:
During 4X operation, this is one-half of a differential strobe pair
that provides timing information for
GAD[15:0]
and
GCBE[1:0]#
signals. The agent
that is providing the data will drive this signal.
ADSTB1
I/O
s/t/s
AGP
AD Bus Strobe-1
During 2X Operation:
During 2X operation, this signal provides timing for
AD[16:31]
and
C/BE[2:3]#
signals. The agent that is providing the data will drive this signal.
During 4X Operation:
During 4X operation, this is one-half of a differential strobe pair
that provides timing information for the
GAD[16:31]
and
GCBE[2:3]#
signals. The
agent that is providing the data will drive this signal.
ADSTB1#
I/O
s/t/s
AGP
AD Bus Strobe-1 Compliment
During 2X Operation:
During 2X operation, this signal is not used
During 4X Operation:
During 4X operation, this is one-half of a differential strobe pair
that provides timing information for the
GAD[16:31]
and
GCBE[2:3]#
signals. The
agent that is providing the data will drive this signal.
SBSTB
I
AGP
SBA Bus Strobe
During 2X Operation:
During 2X operation, this signal provides timing for the
SBA
bus signals. The agent that is driving the SBA bus will drive this signal.
During 4X Operation:
During 4X operation, this is one-half of a differential strobe pair
that provides timing information for the
SBA
bus signals. The agent that is driving the
SBA bus will drive this signal.
SBSTB#
I
AGP
SBA Bus Strobe Compliment
During 2X Operation:
During 2X operation, this signal is not used.
During 4X Operation:
During 4X operation, this is one-half of a differential strobe pair
that provides timing information for the SBA bus signals. The agent that is driving the
SBA bus will drive this signal.
GRCOMP
I/O
AGP RCOMP:
Used to calibrate AGP I/O buffers. This signal pin must be connected
to a PCB trace representative of the AGP bus data signal traces but sufficiently long
to present a long shelf before signal reflection occurs. The AGP buffers are calibrated
based on the measured shelf voltage.
AGPREF
I
AGP Reference:
Reference voltage input for the AGP interface. AGPREF should be
0.4*VDD
AGP
when VDD is 3.3V, or 0.5* VDD
AGP
when VDD is 1.5V.
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