參數(shù)資料
型號: M37221M4-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁數(shù): 20/114頁
文件大?。?/td> 1653K
代理商: M37221M4-XXXSP
12
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37221M4/M8/MA–XXXSP, M37221M6–XXXSP/FP
M37221EASP/FP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
8. FUNCTIONAL DESCRIPTION
8.1 CENTRAL PROCESSING UNIT (CPU)
This microcomputer uses the standard 740 Family instruction set.
Refer to the table of 740 Family addressing modes and machine
instructions or the SERIES 740 <Software> User’s Manual for de-
tails on the instruction set.
Machine-resident 740 Family instructions are as follows:
The FST, SLW instruction cannot be used.
The MUL, DIV, WIT and STP instructions can be used.
8.1.1 CPU Mode Register
The CPU mode register contains the stack page selection bit and
internal system clock selection bit. The CPU mode register is allo-
cated at address 00FB16.
Fig. 8.1.1 CPU Mode Register
B
After reset
RW
0, 1
2
3 to 7
Indeterminate
Name
Functions
Fix these bits to “1.”
1
Stack page selection
bit (CM2) (See note)
0: 0 page
1: 1 page
CPU mode register (CM) [Address 00FB16]
R W
RW
R W
Note: This bit is set to “1” after the reset release.
b7b6b5 b4 b3 b2 b1 b0
CPU Mode Register
1
0
1
Fix these bits to “0.”
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