M34282E2GP MITSUBISHI [Mitsubishi Electric Semiconductor], M34282E2GP Datasheet - Page 30

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M34282E2GP

Manufacturer Part Number
M34282E2GP
Description
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Manufacturer
MITSUBISHI [Mitsubishi Electric Semiconductor]
Datasheets

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30
Operation:
Operation:
Operation:
Operation:
DEY (DEcrement register Y)
IAE (Input Accumulator from port E)
IAG (Input Accumulator from port G)
CMA (CoMplement of Accumulator)
Instrunction
code
Instrunction
code
Instrunction
code
Instrunction
code
(A)
(Y)
(A
(A)
D
D
D
D
0
0
0
0
8
8
8
8
2
–A
0
0
0
0
0
(A)
(Y) – 1
(G)
)
0
0
1
0
(E
2
0
0
0
1
–E
0
1
1
1
0
)
1
0
0
1
1
1
1
0
0
1
1
0
D
D
D
D
0
1
0
0
0
0
0
0
2
2
2
2
0
0
0
0
1
1
5
2
C
7
6
8
16
16
16
16
Grouping:
Description: Subtracts 1 from the contents of register Y.
Grouping:
Description: Transfers the contents of port E to register
Grouping:
Description: Transfers the contents of port G to register
Grouping:
Description: Stores the one’s complement for register
Number of
Number of
Number of
Number of
words
words
words
words
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
1
1
1
1
Number of
Number of
Number of
Number of
Arithmetic operation
A’s contents in register A.
RAM addresses
As a result of subtraction, when the con-
tents of register Y is 15, the next instruction
is skipped.
Input/Output operation
A.
Input/Output operation
A.
MITSUBISHI MICROCOMPUTERS
cycles
cycles
cycles
cycles
1
1
1
1
Flag CY
Flag CY
Flag CY
Flag CY
4282 Group
Skip condition
Skip condition
Skip condition
Skip condition
(Y) = 15

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