4552 Datasheet, PDF (91/145 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4552 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZI0 (Skip if Non Zero condition of external 0 Interrupt input pin)
Instruction
code
D9
D0
Number of Number of Flag CY Skip condition
0 0 0 0 1 1 1 0 1 0 ₂ 0 3 A ₁₆
words
1
cycles
1
– I12 = 0 : (INT) = “L”
I12 = 1 : (INT) = “H”
Operation:
I12 = 0 : (INT) = “L” ?
I12 = 1 : (INT) = “H” ?
(I12 : bit 2 of the interrupt control register I1)
Grouping: Interrupt operation
Description: When I12 = 0 : Skips the next instruction
when the level of INT pin is “L.” Executes
the next instruction when the level of INT
pin is “H.”
When I12 = 1 : Skips the next instruction
when the level of INT pin is “H.” Executes
the next instruction when the level of INT
pin is “L.”
SNZP (Skip if Non Zero condition of Power down flag)
Instruction
code
D9
D0
Number of Number of Flag CY
0000000011
003
words
cycles
2
16
1
1
–
Skip condition
(P) = 1
Operation: (P) = 1 ?
Grouping: Other operation
Description: Skips the next instruction when the P flag is
“1”.
After skipping, the P flag remains un-
changed.
Executes the next instruction when the P
flag is “0.”
SNZT1 (Skip if Non Zero condition of Timer 1 interrupt request flag)
Instruction
code
D9
D0
Number of
1010000000
280
2
16
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V12 = 0: (T1F) = 1
Operation:
V12 = 0: (T1F) = 1 ?
(T1F) ← 0
V12 = 1: SNZT1 = NOP
(V12 = bit 2 of interrupt control register V1)
Grouping: Timer operation
Description: When V12 = 0 : Clears (0) to the T1F flag
and skips the next instruction when timer 1
interrupt request flag T1F is “1.” When the
T1F flag is “0,” executes the next instruc-
tion.
When V12 = 1 : This instruction is equiva-
lent to the NOP instruction.
SNZT2 (Skip if Non Zero condition of Timer 2 interrupt request flag)
Instruction
code
D9
D0
Number of
1010000001
281
2
16
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V13 = 0: (T2F) = 1
Operation:
V13 = 0: (T2F) = 1 ?
(T2F) ← 0
V13 = 1: SNZT2 = NOP
(V13 = bit 3 of interrupt control register V1)
Grouping: Timer operation
Description: When V13 = 0 : Clears (0) to the T2F flag
and skips the next instruction when timer 2
interrupt request flag T2F is “1.” When the
T2F flag is “0,” executes the next instruc-
tion.
When V13 = 1 : This instruction is equiva-
lent to the NOP instruction.
Rev.3.02 Dec 22, 2006 page 91 of 142
REJ03B0023-0302