4507 Datasheet, PDF (63/115 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4507 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
CMA (CoMplement of Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
0 0 0 0 0 1 1 1 0 0 ₂ 0 1 C ₁₆
1
1
–
Skip condition
–
Operation: (A) ← (A)
Grouping: Arithmetic operation
Description: Stores the one’s complement for register
A’s contents in register A.
CMCK (Clock select: ceraMic resonance ClocK)
Instruction
code
D9
D0
Number of Number of Flag CY
1010011010
29A
words
cycles
2
16
1
1
–
Skip condition
–
Operation: Ceramic resonance circuit selected
Grouping: Other operation
Description: Selects the ceramic resonance circuit and
stops the on-chip oscillator.
CRCK (Clock select: Rc oscillation ClocK)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
1
0
1
0
0
1
1
0
1
1
2
2
9
B ₁₆
1
1
–
Skip condition
–
Operation: RC oscillation circuit selected
Grouping: Other operation
Description: Selects the RC oscillation circuit and stops
the on-chip oscillator.
DEY (DEcrement register Y)
Instruction
code
D9
D0
Number of Number of Flag CY
0000010111
017
words
cycles
2
16
1
1
–
Skip condition
(Y) = 15
Operation: (Y) ← (Y) – 1
Grouping: RAM addresses
Description: Subtracts 1 from the contents of register Y.
As a result of subtraction, when the con-
tents of register Y is 15, the next instruction
is skipped. When the contents of register Y
is not 15, the next instruction is executed.
Rev.3.01 2005.02.04 page 63 of 111
REJ03B0107-0301