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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: 32/79頁
文件大小: 501K
代理商: W90220F
W90220F
32
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.
0 = Disable
1 = Enable
Bit 3
DRAM bank_1 enable
0 = Disable
1 = Enable
Bit 4
DRAM bank_0 enable
0 = Disable
1 = Enable
Bit 5
Swap out 0xA0000 ~ 0xFFFFF
When this bit is set to a logic 1, address space 0xA0000 ~ 0xFFFFF will not be recognized as
"system" DRAM space.
Bit 6
Fast Write Enable (
FW
)
"FW"
together with RAMconf2[2:3] (
"CASPC, CASWR"
) determine CAS# precharge- and
active-time during
"DRAM write"
cycles.
(Table 5.2.1-2 CAS# precharge-time during "
write cycle
")
FW, CASPC
CAS# precharge-time
(SYSCLK)
1 0
1 1
0 0
0 1
0.5
0.5
1
2
(Table 5.2.1-3. CAS# active-time during "
write cycle
")
FW, CASWR
CAS# active-time
(SYSCLK)
1 0
1 1
0 0
0 1
0.5
1.5
1
2
Bit 7
Fast Read Enable (
FR
)
"FR"
together with RAMconf2[2] (
"CASPC"
) and RAMconf3[6:7] (
"CASRD[0:1]"
) deter-
mine CAS# precharge- and active-time during
"DRAM
read"
cycles.
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