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參數資料
型號: W90221F
廠商: WINBOND ELECTRONICS CORP
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: PA - RISC的嵌入式微控制器(惠普的PA - RISC結構的32位嵌入式微控制器)
文件頁數: 109/174頁
文件大小: 2102K
代理商: W90221F
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The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed, distributed or reproduced without permission from Winbond.
109
Versi on 0. 4, March/2000
0
1
2
3
4
5
6
7
BUSY#
nACK
PE
SEL
nFAULT
EMPTY
FULL
CMDtrue
Bits 0 Inverted version of Parallel Port Interface "BUSY" signal
Bit 1
Version of Parallel Port Interface "nACK" signal
Bit 2
Version of Parallel Port Interface "PError" signal
Bit 3
Version of Parallel Port Interface "Select" signal
Bit 4
Version of Parallel Port Interface "nFault" signal
Bit 5
Echo device data FIFO "empty" status
0 = device data FIFO is not empty
1 = device data FIFO is empty
Bit 6
Echo device data FIFO "full" status
0 = device data FIFO is not full
1 = device data FIFO is full
Bit 7
"Command" pended
0 = Command Register (CMD) contains no command code
1 = A command code is in CMD not been transfered yet
This read-only register reflects the inputs on the Parallel Port Interface and some of device data
FIFO and Command Register status.
Device Control Register (DCR)
Port address : 0xf000037a
Read/write
Power-on Default : 0x0
0
1
2
3
4
5
6
7
Reserved
DOE
nAck_Ien nSELIN#
nINIT
nAUFD#
nSTB#
Bit 2
Data bus output enable
0 = Data bus is drived by PPI for forward transferring
1 = Data bus is drived by peripheral device for reverse transferring
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