4524 Datasheet, PDF (108/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZT4 (Skip if Non Zero condition of Timer 4 inerrupt request flag)
Instruction
code
D9
D0
Number of
1
0
1
0
0
0
0
0
1
1
2
2
8
3 ₁₆
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V23 = 0: (T4F) = 1
Operation:
V23 = 0: (T4F) = 1 ?
After skipping, (T4F) ← 0
V23 = 1: SNZT4 = NOP
(V23 = bit 3 of interrupt control register V2)
Grouping: Timer operation
Description: When V23 = 0 : Skips the next instruction
when timer 4 interrupt request flag T4F is
“1.” After skipping, clears (0) to the T4F
flag. When the T4F flag is “0,” executes the
next instruction.
When V23 = 1 : This instruction is equiva-
lent to the NOP instruction.
SNZT5 (Skip if Non Zero condition of Timer 5 inerrupt request flag)
Instruction
code
D9
D0
Number of
1
0
1
0
0
0
0
1
0
0
2
2
8
4 ₁₆
words
1
Number of
cycles
1
Flag CY
–
Skip condition
V21 = 0: (T5F) = 1
Operation:
V21 = 0: (T5F) = 1 ?
After skipping, (T5F) ← 0
V21 = 1: SNZT5 = NOP
(V21 = bit 1 of interrupt control register V2)
Grouping: Timer operation
Description: When V21 = 0 : Skips the next instruction
when timer 5 interrupt request flag T5F is
“1.” After skipping, clears (0) to the T5F
flag. When the T5F flag is “0,” executes the
next instruction.
When V21 = 1 : This instruction is equiva-
lent to the NOP instruction.
SST (Serial i/o transmission/reception STart)
Instruction
code
D9
D0
Number of Number of Flag CY
1010011110
29E
words
cycles
2
16
1
1
–
Skip condition
–
Operation:
(SIOF) ← 0
Serial I/O transmission/reception start
Grouping: Serial I/O operation
Description: Clears (0) to SIOF flag and starts serial I/O.
SVDE (Set Voltage Detector Enable flag)
Instruction
code
D9
D0
Number of Number of Flag CY
1010010011
293
words
cycles
2
16
1
1
–
Skip condition
–
Operation: At power down mode, voltage drop detection circuit valid
Grouping: Other operation
Description: Validates the voltage drop detection circuit
at power down (clock operating mode and
RAM back-up mode) when VDCE pin is “H”.
Rev.2.00 Jul 27, 2004 page 108 of 159
REJ03B0091-0200Z