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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: 114/174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.
114
Versi on 0. 4, March/2000
"Reset" situation
transfer is done.
: TC is deasserted by DMA controller.
Bits 4 Dfifo Empty Interrupt flag
"Set" situation : If IER[4] is set, and Dfifo is empty during "
forward transferring
".
"Reset" situation
: CPU write new data into Dfifo.
Bits 5 Dfifo Read Threshold Interrupt flag
"Set" situation : If IER[5] is set, and data bytes received by Dfifo are exceeded the
threshold level (defined in FCR[4:5] ) during "
reverse transferring
".
"Reset" situation
: CPU read Dfifo such that data bytes in Dfifo are below the thresh-
hold level.
Bits 6 "nFault" Interrupt flag
"Set" situation : If IER[6] is set, and a high-to-low transition is on "nFault" pin.
"Reset" situation
: CPU read Device Status Register (DSR).
Bits 7 "nAck" Interrupt flag
"Set" situation : If DCR[3] is set, and a low-to-high transition is on "nAck" pin.
"Reset" situation
: CPU read Device Status Register (DSR).
Data Register (DR)
Port address : 0xf000037f
Read only
Power-on Default : ---
0
1
2
3
4
5
6
7
8-bit Data of latched Lines status
Bits 0-7
Latched
Line status
The status of data lines of PPI will be latched into this register if a high-to-low
transition is happened on "nAck" pin.
This register is added to support "Peripheral Emulation Mode" operation.
Device Data FIFO (Dfifo)
Port address : 0xf0000370
Read/write
Power-on Default : ---
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