参数资料
型号: SIS600
厂商: SILICON INTEGRATED SYSTEMS CORP
元件分类: 外设及接口
英文描述: MULTIFUNCTION PERIPHERAL, PBGA487
封装: BGA-487
文件页数: 62/144页
文件大小: 1592K
代理商: SIS600
SiS600 Pentium II PCI /A.G.P. Chipset
Preliminary V1.0 Jan. 25, 1999
21
Silicon Integrated Systems Corporation
ST[2:0]
O
Status Bus :
Status bus passes the information to the AGP master what
SiS600 may do.
ST[2:0] Description
000
Indicates that previously requested low priority
read data is being return to the master.
001
Indicates that previously requested high priority read
data is being return to the master.
010
Indicates that the master is to provide low priority
write data for a previous enqueued write command.
011
Indicates that the master is to provide high priority
write data for a previous enqueued write command.
111
Indicates that the master has been given permission
to start a bus transaction.
AD_STB[1:0]
I/O
AD bus Strobe 1 :
AD bus Strobe 1 provides timing for 2x transfer mode on the
AD[31:16]. SiS600 drives this signal while it is providing data.
SB_STB
I
Side Band Strobe :
Side Band Strobe provides timing for SiS600 to strobe
SBA[7:0].
AFRAME#
I/O
Frame (Same as PCI) :
AFRAME# remains deserted by the external pull up resistor in
the AGP operation., bus behaves the same as in the PCI bus
during PCI operations on the AGP bus.
AIRDY#
I/O
AGP IRDY# :
Assertion of AIRDY# indicates the AGP master is ready to
provide all write data for the current transaction. While in the
AGP read cycle, it indicates that the master is ready to transfer a
subsequent block of data.
ATRDY#
I/O
AGP TRDY# :
Assertion of ATRDY# indicates that SiS600 is ready to provide
read data for the entire transaction or is ready to transfer a block
of data.
ASTOP#
I/O
Stop (Same as PCI) :
ASTOP# is only used during PCI operation on the AGP bus.
ADEVSEL#
I/O
Device Select (Same as PCI) :
ADEVSEL# is only used during PCI operation on the AGP bus.
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