4524 Datasheet, PDF (99/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
LZ z (Load register Z with z)
Instruction
code
D9
D0
Number of Number of Flag CY
0
0
0
1
0
0
1
0
z1 z0 ₂ 0
4
8
+z 16
words
1
cycles
1
–
Skip condition
–
Operation: (Z) ← z z = 0 to 3
Grouping: RAM addresses
Description: Loads the value z in the immediate field to
register Z.
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.
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.2.00 Jul 27, 2004 page 99 of 159
REJ03B0091-0200Z