4554 Datasheet, PDF (91/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZI1 (Skip if Non Zero condition of external 1 Interrupt input pin)
Instruction
code
D9
D0
Number of Number of Flag CY Skip condition
0 0 0 0 1 1 1 0 1 1 ₂ 0 3 B ₁₆
words
1
cycles
1
– I22 = 0 : (INT1) = “L”
I22 = 1 : (INT1) = “H”
Operation:
I22 = 0 : (INT1) = “L” ?
I22 = 1 : (INT1) = “H” ?
(I22 : bit 2 of the interrupt control register I2)
Grouping: Interrupt operation
Description: When I22 = 0 : Skips the next instruction
when the level of INT1 pin is “L.” Executes
the next instruction when the level of INT1
pin is “H.”
When I22 = 1 : Skips the next instruction
when the level of INT1 pin is “H.” Executes
the next instruction when the level of INT1
pin is “L.”
SNZP (Skip if Non Zero condition of Power down flag)
Instruction
code
D9
D0
Number of Number of Flag CY
0
0
0
0
0
0
0
0
1
1
0
2
0
3 ₁₆
words
1
cycles
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 Flag CY
cycles
1
–
Skip condition
V12 = 0: (T1F) = 1
Operation:
V12 = 0: (T1F) = 1 ?
After skipping, (T1F) ← 0
V12 = 1: SNZT1 = NOP
(V12 = bit 2 of interrupt control register V1)
Grouping: Timer operation
Description: When V12 = 0 : Skips the next instruction
when timer 1 interrupt request flag T1F is
“1.” After skipping, clears (0) to the T1F
flag. When the T1F flag is “0,” executes the
next instruction.
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 Flag CY
cycles
1
–
Skip condition
V13 = 0: (T2F) = 1
Operation:
V13 = 0: (T2F) = 1 ?
After skipping, (T2F) ← 0
V13 = 1: SNZT2 = NOP
(V13 = bit 3 of interrupt control register V1)
Grouping: Timer operation
Description: When V13 = 0 : Skips the next instruction
when timer 2 interrupt request flag T2F is
“1.” After skipping, clears (0) to the T2F
flag. When the T2F flag is “0,” executes the
next instruction.
When V13 = 1 : This instruction is equiva-
lent to the NOP instruction.
Rev.3.00 Aug 06, 2004 page 91 of 136
REJ03B0043-0300Z