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參數資料
| 型號： | M37531RSS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 8 MHz, MICROCONTROLLER, CDIP42 |
| 封裝： | SHRINK, CERAMIC, PIGGY BACK, DIP-42 |
| 文件頁數： | 76/76頁 |
| 文件大?。?/td> | 1022K |
| 代理商： | M37531RSS |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7531 Group
MITSUBISHI MICROCOMPUTERS
9
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
The 7531 Group uses the standard 740 family instruction set. Refer
to the table of 740 family addressing modes and machine-language
instructions or the 740 Family Software MANUAL for details on each
instruction set.
Machine-resident 740 family instructions are as follows:
1. The FST and SLW instructions cannot be used.
2. The MUL and DIV instructions cannot be used.
3. The WIT instruction can be used.
4. The STP instruction can be used.
[CPU Mode Register] CPUM
The CPU mode register contains the stack page selection bit.
This register is allocated at address 003B16.
Fig. 10 Switching method of CPU mode register
Switching method of CPU mode register
Switch the CPU mode register (CPUM) at the head of program after
releasing Reset in the following method.
Fig. 9 Structure of CPU mode register
Oscillation mode selection bit (Note 1)
0 : Ceramic oscillation
1 : CR oscillation
CPU mode register
(CPUM: address 003B 16, initial value: 80 16)
Stack page selection bit
0 : 0 page
1 : 1 page
Clock division ratio selection bits
b7 b6
0
0 : f(
φ) = f(XIN)/2 (High-speed mode)
0
1 : f(
φ) = f(XIN)/8 (Middle-speed mode)
1
0 : applied from ring oscillator
1
1 : f(
φ) = f(XIN) (Double-speed mode)(Note 2)
Not used (returns “0” when read)
(Do not write “1” to these bits )
Processor mode bits
b1 b0
0
0 Single-chip mode
0
1
0
1
Not available
b7
b0
2: These bits are used only when a ceramic oscillation is selected.
Note 1: The bit can be rewritten only once after releasing reset. After rewriting
it is disable to write any data to the bit. However, by reset the bit is
initialized and can be rewritten, again.
Do not use these when a CR oscillation is selected.
Switch the clock division ratio
selection bits (bits 6 and 7 of CPUM)
Main routine
Switch to other mode except a ring oscillator
(Select one of 1/1, 1/2, and 1/8)
Note. After releasing reset the operation starts by starting a ring oscillator automatically.
Do not use a ring oscillator at ordinary operation.
After releasing reset
Start with a built-in ring oscillator ( Note)
Switch the oscillation mode
selection bit (bit 5 of CPUM)
An initial value is set as a ceramic oscillation
mode. When it is switched to a CR oscillation,
its oscillation starts.
Wait until establishment of
oscillator clock
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相關代理商/技術參數 |
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| M37531T-ADS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Temporary Target Board |
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| M37532M4-A17GP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37532M4-XXXFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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