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參數資料
| 型號： | W90220F |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | PA-RISC Embedded Micro-Controller(惠普PA-RISC結構的32位嵌入式微控制器) |
| 中文描述： | 32-BIT, 150 MHz, RISC PROCESSOR, PQFP208 |
| 封裝： | PLASTIC, QFP-208 |
| 文件頁數： | 40/79頁 |
| 文件大小： | 501K |
| 代理商： | W90220F |
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W90220F
40
The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Version 0.84
Winbond.
This bit is valid only in the transfer between memory and IO.
Bit 7-8 DMA IO device type(IOtype)
00 = 8-bit type, length counter(LENC) counts by byte
01 = 16-bit type, length counter counts by half word
10 = 32-bit type, length counter countes by word
11 = undefined
Only 8-bit external IO device is supported.
Bit 9-10 DMA transfer type(TRtype)
00 = memory to memory transfer
01 = memory to IO transfer
1x = IO to memory transfer
Bit 11-15
DMA IO read/write command recovery time(IOrec)
This field define the recovery cycle between two read/write command.
Bit 16-20
DMA IO read/write command wait state(Wstate)
This field define the IO read/write command wait state.
In MOD0:
Bit21
DMA transfer fix mode(FIX)
1 = Set DMA transfer as rotate mode. In rotate mode, the DMA controller acknowledge channel 1
request right after channel 0 being served. The channel 1 and channel 0 are served by turns.
0 = DMA is set in fix mode. Channel 0 is the most privilege. The channel 1 will not get the service
token, unless channel 0 release the request.
Bit22
Reserved
This bit should be set to 0.
Bit23-31 Ready timeout counter(Tout)
Set IO device assert NOT ready timeout cycle count. When IO read/write command is issued, and if
the IO device inserts wait state by asserting IORDY, the ready timeout counter starts to count. If the
counter reach the Tout before read/write command is completed, the timeout flag TO0 or TO1 is to
be set.
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| W90221F | PA-RISC Embedded Micro-Controller(惠普PA-RISC結構的32位嵌入式微控制器) |
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