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參數(shù)資料
| 型號： | AM53C96KC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 總線控制器 |
| 英文描述： | High Performance SCSI Controller |
| 中文描述： | SCSI BUS CONTROLLER, PQFP100 |
| 封裝： | 35 MM, CARRIER RING, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 18/63頁 |
| 文件大?。?/td> | 455K |
| 代理商： | AM53C96KC |
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P R E L I M I N A R Y
AMD
18
Am53C94/Am53C96
CMDREG – Bit 7 – DMA – Direct Memory Access
The DMA bit when set notifies the device that the com-
mand is a DMA instruction, when reset it is a non-DMA
instruction. For DMA instructions the Current Transfer
Count Register (CTCREG) will be loaded with the con-
tents of the Start Transfer Count Register (STCREG).
The data is then transferred and the CTCREG is decre-
mented for each byte until it reaches zero.
CMDREG – Bits 6:0 – CMD 6:0 – Command 6:0
These command bits decode the commands that the
device needs to perform. There are a total of 29
commands grouped into four categories. The groups
are Initiator Commands, Target Commands, Selection/
Reselection Commands and General Purpose Com-
mands.
Initiator Commands
CMD6
0
0
0
0
0
0
Target Commands
CMD5
0
0
0
0
0
0
CMD4
1
1
1
1
1
1
CMD3
0
0
0
1
1
1
CMD2
0
0
0
0
0
0
CMD1
0
0
1
0
1
1
CMD0
0
1
0
0
0
1
Command
Information Transfer
Initiator Command Complete Steps
Message Accepted
Transfer Pad Bytes
Set ATN
Reset ATN
CMD6
0
0
0
0
0
0
0
0
0
0
0
0
CMD5
1
1
1
1
1
1
1
1
1
1
1
0
CMD4
0
0
0
0
0
0
0
0
0
0
0
0
CMD3
0
0
0
0
0
0
0
1
1
1
1
0
CMD2
0
0
0
0
1
1
1
0
0
0
0
1
CMD1
0
0
1
1
0
0
1
0
0
1
1
0
CMD0
0
1
0
1
0
1
1
0
1
0
1
0
Command
Send Message
Send Status
Send Data
Disconnect Steps
Terminate Steps
Target Command Complete Steps
Disconnect
Receive Message Steps
Receive Command
Receive Data
Receive Command Steps
DMA Stop
Idle Commands
CMD6
1
1
1
1
1
1
1
CMD5
0
0
0
0
0
0
0
CMD4
0
0
0
0
0
0
0
CMD3
0
0
0
0
0
0
0
CMD2
0
0
0
0
1
1
1
CMD1
0
0
1
1
0
0
1
CMD0
0
1
0
1
0
1
0
Command
Reselect Steps
Select without ATN Steps
Select with ATN Steps
Select with ATN and Stop Steps
Enable Selection/Reselection
Disable Selection/Reselection
Select with ATN3 Steps
General Commands
CMD6
0
0
0
0
CMD5
0
0
0
0
CMD4
0
0
0
0
CMD3
0
0
0
0
CMD2
0
0
0
0
CMD1
0
0
1
1
CMD0
0
1
0
1
Command
No Operation
Clear FIFO
Reset Device
Reset SCSI Bus
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相關(guān)代理商/技術(shù)參數(shù) |
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| AM53C96KCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:High Performance SCSI Controller |
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