4507 Datasheet, PDF (69/115 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4507 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
POF2 (Power OFf2)
Instruction
code
D9
D0
Number of Number of Flag CY
0000001000
008
words
cycles
2
16
1
1
–
Skip condition
–
Operation: RAM back-up
Grouping: Other operation
Description: Puts the system in RAM back-up state by
executing the POF2 instruction after ex-
ecuting the EPOF instruction. Operations of
all functions are stopped.
Note:
If the EPOF instruction is not executed before
executing this instruction, this instruction is
equivalent to the NOP instruction.
RAR (Rotate Accumulator Right)
Instruction
code
D9
D0
Number of Number of Flag CY
0
0
0
0
0
1
1
1
0
1
0
2
1
D ₁₆
words
1
cycles
1
0/1
Skip condition
–
Operation:
→ CY → A3A2A1A0
Grouping: Arithmetic operation
Description: Rotates 1 bit of the contents of register A in-
cluding the contents of carry flag CY to the
right.
RB j (Reset Bit)
Instruction
code
D9
D0
Number of Number of Flag CY
00010011j
j
0
2
4
C
+j ₁₆
words
1
cycles
1
–
Skip condition
–
Operation:
(Mj(DP)) ← 0
j = 0 to 3
Grouping: Bit operation
Description: Clears (0) the contents of bit j (bit specified
by the value j in the immediate field) of
M(DP).
RC (Reset Carry flag)
Instruction
code
D9
D0
Number of Number of Flag CY
0000000110
006
words
cycles
2
16
1
1
0
Skip condition
–
Operation: (CY) ← 0
Grouping: Arithmetic operation
Description: Clears (0) to carry flag CY.
Rev.3.01 2005.02.04 page 69 of 111
REJ03B0107-0301