4502 Datasheet, PDF (75/116 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4502 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZP (Skip if Non Zero condition of Power down flag)
Instruction D9
D0
code
0000000011
00
2
3
16
Number of
words
1
Number of Flag CY
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 inerrupt 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 ?
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 inerrupt 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 ?
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.
SZB j (Skip if Zero, Bit)
Instruction
code
D9
D0
Number of Number of Flag CY
00001000j j
02j
words
cycles
2
16
1
1
–
Skip condition
(Mj(DP)) = 0
j = 0 to 3
Operation:
(Mj(DP)) = 0 ?
j = 0 to 3
Grouping: Bit operation
Description: Skips the next instruction when the con-
tents of bit j (bit specified by the value j in
the immediate field) of M(DP) is “0.”
Executes the next instruction when the con-
tents of bit j of M(DP) is “1.”
Rev.3.01 2005.02.02 page 75 of 112
REJ03B0105-0301