4501_M Datasheet, PDF (87/212 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4501 Group
HARDWARE
INSTRUCTIONS
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SNZCP (Skip if Non Zero condition of Port C)
Instruction
code
D9
D0
Number of Number of Flag CY
1010001001
289
words
cycles
2
16
1
1
–
Skip condition
(C) = 1
Operation: (C) = 1 ?
Grouping:
Description:
Input/Output operation
Skips the next instruction when the contents
of port C is “1.”
Executes the next instruction when the con-
tents of port C is “0.”
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
0
2
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:
Description:
Interrupt operation
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:
Description:
Other operation
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:
Description:
Timer operation
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 equivalent
to the NOP instruction.
Rev.2.01 Feb 07, 2005
REJ09B0192-0201
1-75