4552 Datasheet, PDF (92/145 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4552 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZT3 (Skip if Non Zero condition of Timer 3 interrupt request flag)
Instruction
code
D9
D0
Number of
1010000010
282
2
16
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V20 = 0: (T3F) = 1
Operation:
V20 = 0: (T3F) = 1 ?
(T3F) ← 0
V20 = 1: SNZT3 = NOP
(V20 = bit 0 of interrupt control register V2)
Grouping: Timer operation
Description: When V20 = 0 : Clears (0) to the T3F flag
and skips the next instruction when timer 3
interrupt request flag T3F is “1.” When the
T3F flag is “0,” executes the next instruc-
tion.
When V20 = 1 : This instruction is equiva-
lent to the NOP instruction.
SRST (System ReSeT)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
0 0 0 0 0 0 0 0 0 1 ₂ 0 0 1 ₁₆
1
1
–
Skip condition
–
Operation: System reset occurrence
Grouping: Other operation
Description: System reset occurs.
SUPT (Set UPTF flag)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
0
0
0
1
0
1
1
0
0
1
2
0
5
9 ₁₆
1
1
–
Skip condition
–
Operation: (UPTF) ← 1
Grouping: Other operation
Description: Sets (1) to high-order bit reference enable
flag.
SVDE (Se Voltage Detector Enable flag)
Instruction
code
D9
D0
Number of Number of Flag CY
1
0
1
0
0
1
0
0
1
1
2
2
9
3 ₁₆
words
1
cycles
1
–
Skip condition
–
Operation: Voltage drop detection circuit valid at powerdown mode.
Grouping: Other operation
Description: Voltage drop detection circuit is valid at
powerdown mode (clock operating mode,
RAM back-up mode)
Note: This instruction can be used only for H version.
Rev.3.02 Dec 22, 2006 page 92 of 142
REJ03B0023-0302