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參數(shù)資料
| 型號： | M37754M8C-XXXGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 40 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁數(shù)： | 21/115頁 |
| 文件大?。?/td> | 1571K |
| 代理商： | M37754M8C-XXXGP |
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MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
12
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
__
Figure 5 shows basic waveforms of the bus interface unit. The RD
signal becomes “L” when the bus interface unit reads an instruction
___
code or data from memory. The WR signal becomes “L” when the
bus interface unit writes data to memory.
Waveforms (1) and (3) in Figure 5 are used to access a single byte
or two bytes simultaneously. To read or write two bytes simulta-
neously, the first address accessed must be even. Furthermore,
when accessing an external memory area in memory expansion
mode or microprocessor mode, set the bus width select input pin
(BYTE) to “L” (external data bus width = 16 bits). The internal
memory area is always treated as 16-bit bus width regardless of
BYTE.
When performing 16-bit data read or write, if the conditions for simul-
taneously accessing two bytes are not satisfied, waveforms (2) and
(4) are used to access each byte, one by one.
However, when prefetching the instruction code, if the address of the
instruction code is odd, only one byte is read in the instruction queue
buffer.
Fig. 5 Basic waveforms of bus interface unit
(3)
(4)
(1)
(2)
WR
RD
Internal address
bus
(A0 – A23)
Internal data bus
(D0 – D7)
Internal data bus
(D8 – D15)
Address
Data (even)
Data (odd)
WR
RD
Internal address
bus
(A0 – A23)
Internal data bus
(D0 – D7)
Internal data bus
(D8 – D15)
Address
Data (even)
Data (odd)
WR
RD
Internal address
bus
(A0 – A23)
Internal data bus
(D0 – D7)
Internal data bus
(D8 – D15)
Address (odd)
Address (even)
Address (odd)
Address (even)
Invalid data
Data (odd)
WR
RD
Internal address
bus
(A0 – A23)
Internal data bus
(D0 – D7)
Internal data bus
(D8 – D15)
Invalid data
Data (odd)
Data (even)
Invalid data
Data (even)
Invalid data
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M37754M8C-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754S4CGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754S4CHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M3775PR-H400CL | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
| M3775RK-0.75A | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
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