4501_M Datasheet, PDF (81/212 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4501 Group
HARDWARE
INSTRUCTIONS
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
NOP (No OPeration)
Instruction
code
D9
D0
Number of Number of Flag CY
0000000000
000
words
cycles
2
16
1
1
–
Skip condition
–
Operation: (PC) ← (PC) + 1
Grouping: Other operation
Description: No operation; Adds 1 to program counter
value, and others remain unchanged.
OKA (Output port K from Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
1000011111
21F
words
cycles
2
16
1
1
–
Skip condition
–
Operation: (K) ← (A0)
Grouping: Input/Output operation
Description: Outputs the contents of bit 0 (A0) of register
A to port K.
OP0A (Output port P0 from Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
1000100000
220
words
cycles
2
16
1
1
–
Skip condition
–
Operation: (P0) ← (A)
Grouping: Input/Output operation
Description: Outputs the contents of register A to port P0.
OP1A (Output port P1 from Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
1000100001
221
words
cycles
2
16
1
1
–
Skip condition
–
Operation: (P1) ← (A)
Grouping: Input/Output operation
Description: Outputs the contents of register A to port P1.
Rev.2.01 Feb 07, 2005
REJ09B0192-0201
1-69