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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： | 50/79頁 |
| 文件大小： | 501K |
| 代理商： | W90220F |
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W90220F
50
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.
8-bit data bus in output enable mode which are suit for "standard mode" transfering.
FIFO Status Register (FSR)
Port address : 0xf000037b
Read only
Power-on Default : ---
0
1
2
3
4
5
6
7
Dfifo valid bytes
DA
SA
OV
Bits 0-4 Valid bytes in device data FIFO (Dfifo)
During forward transfering, these bits indicate that how many bytes in 16-byte Dfifo still
not be transfered yet. While during reverse transfering, these bits shows the number of
data bytes which received from parallel port interface and not be read by CPU core.
Bit 5
Dfifo data available
0 = Dfifo contains data bytes less than one "PWord"
1 = Dfifo contains at least one "PWord" of valid data.
Bit 6
Dfifo space available
0 = Dfifo contains empty locations less than one "PWord"
1 = Dfifo contains at least one "PWord" of empty locations.
Bit 7
Dfifo over/under run
0 = Dfifo is not yet over- or under-run
1 = Dfifo is already over- or under-run
Once this bit is set, it will keep on set state until Dfifo or the PPI is reset.
FIFO Control Register (FCR)
Port address : 0xf000037c
Read/Write
Power-on Default : 0x0
0
1
2
3
4
5
6
7
DMAen
FRST
DRST
PWord
MOD
RDTH
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