4501_M Datasheet, PDF (86/212 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4501 Group
HARDWARE
INSTRUCTIONS
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SEA n (Skip Equal, Accumulator with immediate data n)
Instruction D9
D0
code
0000100101
02
2
5 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 contents
n = 0 to 15
of register A is equal to the value n in the im-
mediate 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
words
cycles
0
0
0
0
1
0
0
1
1
0
0
2
2
6 ₁₆
1
1
–
Skip condition
(A) = (M(DP))
Operation: (A) = (M(DP)) ?
Grouping:
Description:
Comparison operation
Skips the next instruction when the contents
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:
Description:
Interrupt operation
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 equivalent
to the NOP instruction.
SNZAD (Skip if Non Zero condition of A/D conversion completion flag)
Instruction
code
D9
D0
Number of
1010000111
287
2
16
words
1
Number of Flag CY
cycles
1
–
Skip condition
V22 = 0: (ADF) = 1
Operation:
V22 = 0: (ADF) = 1 ?
After skipping, (ADF) ← 0
V22 = 1: SNZAD = NOP
(V22 : bit 2 of the interrupt control register V2)
Grouping:
Description:
A/D conversion operation
When V22 = 0 : Skips the next instruction
when A/D conversion completion flag ADF
is “1.” After skipping, clears (0) to the ADF
flag. When the ADF flag is “0,” executes the
next instruction.
When V22 = 1 : This instruction is equivalent
to the NOP instruction.
Rev.2.01 Feb 07, 2005
REJ09B0192-0201
1-74