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參數(shù)資料
| 型號(hào)： | M37754S4CHP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片16位微機(jī)的CMOS |
| 文件頁數(shù)： | 13/114頁 |
| 文件大小： | 1116K |
| 代理商： | M37754S4CHP |
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MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Instruction code read, data read, and data write are described below.
Instruction code read will be described first.
The CPU obtains instruction codes from the instruction queue buffer
and executes them. The CPU notifies the bus interface unit that CPU
is requesting an instruction code during an instruction code request
cycle. If the requested instruction code is not yet stored in the instruc-
tion queue buffer, the bus interface unit halts the CPU until it can
store more instructions than requested in the instruction queue
buffer.
Even if there is no instruction code request from the CPU, the bus
interface unit reads instruction codes from memory and stores them
in the instruction queue buffer when the instruction queue buffer is
empty or when only one instruction code is stored and the bus is idle
on the next cycle.
This is referred to as instruction pre-fetching.
Normally, when reading an instruction code from memory, if the ac-
cessed address is even, the next odd address is read together with
the instruction code and stored in the instruction queue buffer.
However, in memory expansion mode or microprocessor mode, if the
bus width select input (BYTE) is “H” and external data bus width is 8
bits, and if the address to be read is in external memory area or is
odd, only one byte is read and stored in the instruction queue buffer.
Data read and write are described below.
The CPU notifies the bus interface unit when performing data read
or write. At this time, the bus interface unit halts the CPU if the bus
interface unit is already using the bus or if there is a request with
higher priority. When data read or write is enabled, the bus interface
unit performs data read or write.
During data read, the CPU waits until the entire data is stored in the
data buffer. The bus interface unit sends the address sent from the
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37754 | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| M37754M8C | Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī)) |
| M37902F8CHP | DIODE SCHOTTKY DUAL COMMON-ANODE 25V 200mW 0.32V-vf 200mA-IFM 1mA-IF 2uA-IR SOT-23 3K/REEL |
| M37902FGCGP | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37902FCCHP | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| 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 |
| M3775RK-C0.50A | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
| M3775RK-C0.50B | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
| M3775RK-C0.50C | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING RESISTOR |
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