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參數(shù)資料
| 型號： | M38869MFAHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件頁數(shù)： | 70/111頁 |
| 文件大小： | 1644K |
| 代理商： | M38869MFAHP |
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61
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
for flash
memory
version
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
BUS CONTROL AT MEMORY EXPANSION
The 3886 group has a built-in ONW function to facilitate access to
an external (expanded) memory and I/O devices in memory ex-
pansion mode or microprocessor mode.
If an “L” level signal is input to the P32/ONW pin 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 term, the RD
and WR signals remain at “L.” This extension function is valid only
for writing to and reading from addresses 000016 to 000716 and
044016 to FFFF16, and only read and write cycles are extended.
Fig. 63 ONW function timing
φ
RD
WR
ONW
*
**
* Term where ONW input signal is received.
During this term, 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 043F16,
because the ONW signal is not received.
Read cycle
Write cycle
Dummy cycle Write cycle
Read cycle Dummy cycle
AD15—AD0
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