4524 Datasheet, PDF (105/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SEA n (Skip Equal, Accumulator with immediate data n)
Instruction D9
D0
code
0000100101
025
2
16
Number of
words
2
Number of
cycles
2
Flag CY
–
Skip condition
(A) = n
Operation:
0 0 0 1 1 1 n n n n ₂ 0 7 n _{16 Grouping: Comparison operation}
(A) = n ?
Description: Skips the next instruction when the con-
n = 0 to 15
tents of register A is equal to the value n in
the immediate field.
Executes the next instruction when the con-
tents of register A is not equal to the value n
in the immediate field.
SEAM (Skip Equal, Accumulator with Memory)
Instruction
code
D9
D0
Number of Number of Flag CY
0000100110
026
words
cycles
2
16
1
1
–
Skip condition
(A) = (M(DP))
Operation: (A) = (M(DP)) ?
Grouping: Comparison operation
Description: Skips the next instruction when the con-
tents of register A is equal to the contents of
M(DP).
Executes the next instruction when the con-
tents of register A is not equal to the
contents of M(DP).
SNZ0 (Skip if Non Zero condition of external 0 interrupt request flag)
Instruction
code
D9
D0
Number of
0000111000
038
2
16
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V10 = 0: (EXF0) = 1
Operation:
V10 = 0: (EXF0) = 1 ?
After skipping, (EXF0) ← 0
V10 = 1: SNZ0 = NOP
(V10 : bit 0 of the interrupt control register V1)
Grouping: Interrupt operation
Description: When V10 = 0 : Skips the next instruction
when external 0 interrupt request flag EXF0
is “1.” After skipping, clears (0) to the EXF0
flag. When the EXF0 flag is “0,” executes
the next instruction.
When V10 = 1 : This instruction is equiva-
lent to the NOP instruction.
SNZ1 (Skip if Non Zero condition of external 1 interrupt request flag)
Instruction
code
D9
D0
Number of
0000111001
039
2
16
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V11 = 0: (EXF1) = 1
Operation:
V11 = 0: (EXF1) = 1 ?
After skipping, (EXF1) ← 0
V11 = 1: SNZ1 = NOP
(V11 : bit 1 of the interrupt control register V1)
Grouping: Interrupt operation
Description: When V11 = 0 : Skips the next instruction
when external 1 interrupt request flag EXF1
is “1.” After skipping, clears (0) to the EXF1
flag. When the EXF1 flag is “0,” executes
the next instruction.
When V11 = 1 : This instruction is equiva-
lent to the NOP instruction.
Rev.2.00 Jul 27, 2004 page 105 of 159
REJ03B0091-0200Z