4552 Datasheet, PDF (90/145 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4552 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SD (Set port D specified by register Y)
Instruction
code
D9
D0
Number of Number of Flag CY
0000010101
015
words
cycles
2
16
1
1
–
Skip condition
–
Operation:
(D(Y)) ← 1
(Y) = 0 to 7
Grouping: Input/Output operation
Description: Sets (1) to a bit of port D specified by regis-
ter Y.
SEA n (Skip Equal, Accumulator with immediate data n)
Instruction
code
D9
D0
Number of Number of Flag CY
0000100101
025
words
cycles
2
16
2
2
–
Skip condition
(A) = n
0 0 0 1 1 1 n n n n ₂ 0 7 n _{16 Grouping: Comparison operation}
n = 0 to 15
Operation:
(A) = n ?
n = 0 to 15
Description: Skips the next instruction when the con-
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 Flag CY
cycles
1
–
Skip condition
V10 = 0: (EXF0) = 1
Operation:
V10 = 0: (EXF0) = 1 ?
(EXF0) ← 0
V10 = 1: SNZ0 = NOP
(V10 : bit 0 of the interrupt control register V1)
Grouping: Interrupt operation
Description: When V10 = 0 : Clears (0) to the EXF0 flag
and skips the next instruction when external
0 interrupt request flag EXF0 is “1.” When
the EXF0 flag is “0,” executes the next in-
struction.
When V10 = 1 : This instruction is equiva-
lent to the NOP instruction.
Rev.3.02 Dec 22, 2006 page 90 of 142
REJ03B0023-0302