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参数资料
| 型号： | M38073E4FS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, UVPROM, 4 MHz, MICROCONTROLLER, CQCC80 |
| 封装： | 0.80 MM PITCH, CERAMIC, LCC-80 |
| 文件页数： | 53/77页 |
| 文件大小： | 1126K |
| 代理商： | M38073E4FS |
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54
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Bus control at memory expansion
_____
The 3807 group has a built-in ONW function to facilitate access to
external (expanded) memory and I/O devices in memory expansion
mode or microprocessor mode.
_____
If an "L" level signal is input to port P32/ONW when the CPU is in a
read or write state, the corresponding read or write cycle is extended
___
by one cycle of
φ. During this extended period, the RD or WR signal
remains at "L". This extension function is valid only for writing to and
reading from addresses 000016 to 000716 and 084016 to FFFF16, and
only read and write cycles are extended.
_____
Fig. 61. ONW function timing
φ
RD
WR
ONW
*
Read cycle
Write cycle
Dummy cycle Write cycle
Read cycle Dummy cycle
AD15—AD0
* Period during which ONW input signal is received
During this period, the ONW signal must be fixed at either "H" or "L". At all other times, the input level of the ONW
signal has no affect on operations. The bus cycles is not extended for an address in the area 000816 to 083F16,
regardless of whether the ONW signal is received.
*
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38078RFS | 制造商:Renesas Electronics Corporation 功能描述:EMULATION MCU/8BIT CMOS EMULATION CHIP - Bulk |
| M3808 | 功能描述:电缆固定件和配件 LTRSCG 625 BLACK RoHS:否 制造商:Heyco 类型:Cable Grips, Liquid Tight 材料:Nylon 颜色:Black 安装方法:Cable 最大光束直径:11.4 mm 抗拉强度: |
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| M3808 BK002 | 制造商:Alpha Wire Company 功能描述:CBL 10COND 18AWG BLK 500' |
| M3808 BK005 | 制造商:Alpha Wire Company 功能描述:CBL 10COND 18AWG BLK 100' |
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