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M37515M4-XXXHP Datasheet(PDF) 4 Page - Mitsubishi Electric Semiconductor

Part No. M37515M4-XXXHP
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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Maker  MITSUBISHI [Mitsubishi Electric Semiconductor]
Homepage  http://www.mitsubishichips.com
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M37515M4-XXXHP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
FUNCTIONAL DESCRIPTION
CENTRAL PROCESSING UNIT (CPU)
The M37515M4-XXXHP uses the standard 740 Family instruction
set. Refer to the table of 740 Family addressing modes and ma-
chine instructions 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 STP, WIT, MUL, and DIV instructions can be used.
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit, etc.
The CPU mode register is allocated at address 003B16.
Fig. 3 Structure of CPU mode register
CPU mode register
(CPUM : address 003B16)
b7
b0
Stack page selection bit
0 : 0 page
1 : 1 page
Not used (return “1” when read)
(Do not write “0” to this bit.)
Processor mode bits
b1 b0
0
0 : Single-chip mode
0
1 :
1
0 :
Not available
1
1 :
Port XC switch bit
0 : I/O port function (stop oscillating)
1 : XCIN–XCOUT oscillating function
Main clock (X IN–XOUT) stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bits
b7 b6
0
0 :
φ = f(XIN)/2 (high-speed mode)
0
1 :
φ = f(XIN)/8 (middle-speed mode)
1
0 :
φ = f(XCIN)/2 (low-speed mode)
1
1 : Not available




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