4509 Datasheet, PDF (94/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZAD (Skip if Non Zero condition of A/D conversion completion flag)
Instruction
code
D9
D0
Number of
1010000111
287
2
16
words
1
Number of Flag CY
cycles
1
–
Skip condition
V22 = 0: (ADF) = 1
Operation:
V22 = 0: (ADF) = 1 ?
(ADF) ← 0
V22 = 1: SNZAD = NOP
(V22 : bit 2 of the interrupt control register V2)
Grouping: A/D conversion operation
Description: When V22 = 0 : Clears (0) to the ADF flag
and skips the next instruction when A/D
conversion completion flag ADF is “1.” After
skipping, . When the ADF flag is “0,” ex-
ecutes the next instruction.
When V22 = 1 : This instruction is equiva-
lent to the NOP instruction.
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.”
SNZSI (Skip if Non Zero condition of Serial Interface interrupt request flag)
Instruction
code
D9
D0
Number of Number of
1010001000
288
2
16
words
1
cycles
1
Flag CY
–
Skip condition
V23 = 0: (SIOF) =1
Operation:
V23=0: (SIOF)=1?
(SIOF) ← 0
V23 = 1: SNZSI = NOP
Grouping: Serial interface operation
Description: Clears (0) to SIOF flag and skips the next
instruction when the contents of bit 3 (V23)
of interrupt control register V2 is “0” and
contents of SIOF flag is “1.”
When V23 = 1: This instruction is equivalent
to the NOP instruction.
Rev.1.02 2006.12.22 page 94 of 140
REJ03B0147-0102