參數(shù)資料
型號(hào): M37536E8SP
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁(yè)數(shù): 44/46頁(yè)
文件大?。?/td> 660K
代理商: M37536E8SP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7536 Group
MITSUBISHI MICROCOMPUTERS
6
Fig. 6 Switching method of CPU mode register
Fig. 5 Structure of CPU mode register
CPU mode register
(CPUM: address 003B 16)
Stack page selection bit
0 : 0 page
1 : 1 page
Main 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)
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
Switch the clock division ratio
selection bits (bits 6 and 7 of CPUM)
After releasing reset
Main routine
Start with a built-in ring oscillator ( Note)
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.
Wait until ceramic oscillator clock is
stabilized.
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
The 7536 group uses the standard 740 family instruction set. Refer
to the table of 740 family addressing modes and machine instruc-
tions or the 740 Family Software Manual for details on the instruction
set.
Machine-resident 740 family instructions are as follows:
The FST and SLW instructions cannot be used.
The MUL and DIV instructions cannot be used.
The WIT and STP instructions can be used.
The central processing unit (CPU) has the six registers.
Switching method of CPU mode register
Switch the CPU mode register (CPUM) at the head of program after
releasing Reset in the following method.
[CPU Mode Register] CPUM
The CPU mode register contains the stack page selection bit.
This register is allocated at address 003B16.
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