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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: 29/79頁
文件大小: 501K
代理商: W90220F
W90220F
29
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.
Bits 0-2 Wait states of ROM Read cycle
ROMconf2[0:2]
Wait States
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
2
3
4
5
6
7
8
9
Only ROM read cycles have a programmable wait states, while Flash ROM write cycles are
always 9-wait states.
The AC timing of the ROM read/write cycles with different wait states are shown in AC timing
specification.
Bits 3
ROM Bank 0 Only
When this bit is set, all ROM cycles will be directed to bank 0 despite of the programming value
of Base, ROMconf0 and ROMconf1 registers.
Bits 4
Logic Analyzer Mode Enable
This mode is used for chip's testing and debugging. When this bit is set, some of the DMA pins
are used to echo internal 486 bus' control/status signals.
DACK0
echos
ADS#;
IOR
echos
DACK1
echos
MIO#
IOW
echos
CS0
echos
DC#;
TC0
echos
CS1
echos
WR#;
TC1
echos
BLAST#;
BRDY#
RDY#;
HLDA
RAM Base Address Register ( )
Index : 0x20,0x22,0x24, 0x26
Read/Write
Power-on Default : --
0
1
2
3
4
5
6
7
RAM base address bit 0-7 (most significant bits)
Index : 0x21,0x23,0x25,0x27
Read/Write
Power-on Default : --
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