4524 Datasheet, PDF (109/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
SZB j (Skip if Zero, Bit)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
0 0 0 0 1 0 0 0 j j ₂ 0 2 j 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.”
SZC (Skip if Zero, Carry flag)
Instruction
code
D9
D0
Number of Number of Flag CY
0000101111
02F
words
cycles
2
16
1
1
–
Skip condition
(CY) = 0
Operation: (CY) = 0 ?
Grouping: Arithmetic operation
Description: Skips the next instruction when the con-
tents of carry flag CY is “0.”
After skipping, the CY flag remains un-
changed.
Executes the next instruction when the con-
tents of the CY flag is “1.“
SZD (Skip if Zero, port D specified by register Y)
Instruction
code
D9
D0
Number of Number of Flag CY
0000100100
024
words
cycles
2
16
2
2
–
0 0 0 0 1 0 1 0 1 1 ₂ 0 2 B ₁₆
Skip condition
(D(Y)) = 0
(Y) = 0 to 7
Operation:
(D(Y)) = 0 ?
(Y) = 0 to 7
Grouping: Input/Output operation
Description: Skips the next instruction when a bit of port
D specified by register Y is “0.” Executes the
next instruction when the bit is “1.”
T1AB (Transfer data to timer 1 and register R1 from Accumulator and register B)
Instruction
code
D9
D0
Number of Number of
1000110000
230
2
16
words
1
cycles
1
Flag CY
–
Skip condition
–
Operation:
(T17–T14) ← (B)
(R17–R14) ← (B)
(T13–T10) ← (A)
(R13–R10) ← (A)
Grouping: Timer operation
Description: Transfers the contents of register B to the
high-order 4 bits of timer 1 and timer 1 re-
load register R1. Transfers the contents of
register A to the low-order 4 bits of timer 1
and timer 1 reload register R1.
Rev.2.00 Jul 27, 2004 page 109 of 159
REJ03B0091-0200Z