4507_M Datasheet, PDF (78/216 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4507 Group
HARDWARE
INSTRUCTIONS
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
IAP3 (Input Accumulator from port P3)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
1 0 0 1 1 0 0 0 1 1 ₂ 2 6 3 ₁₆
1
1
–
Skip condition
–
Operation:
(A1, A0) ← (P31, P30)
(A3, A2) ← 0
Grouping: Input/Output operation
Description: Transfers the input of port P3 to the low-or-
der 2 bits (A1, A0) of register A.
Note:
After this instruction is executed, sets “0” to
the high-order 2 bits (A3, A2) of register A.
INY (INcrement register Y)
Instruction
code
D9
D0
Number of Number of Flag CY
0000010011
013
words
cycles
2
16
1
1
–
Skip condition
(Y) = 0
Operation: (Y) ← (Y) + 1
Grouping: RAM addresses
Description: Adds 1 to the contents of register Y. As a re-
sult of addition, when the contents of
register Y is 0, the next instruction is
skipped. When the contents of register Y is
not 0, the next instruction is executed.
LA n (Load n in Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
000111nnnn
07n
words
cycles
2
16
1
1
–
Skip condition
Continuous
description
Operation: (A) ← n
Grouping: Arithmetic operation
n = 0 to 15
Description: Loads the value n in the immediate field to
register A.
When the LA instructions are continuously
coded and executed, only the first LA in-
struction is executed and other LA
instructions coded continuously are
skipped.
LXY x, y (Load register X and Y with x and y)
Instruction
code
D9
D0
Number of Number of Flag CY
1 1 x3 x2 x1 x0 y3 y2 y1 y0 3 x y
words
cycles
2
16
1
1
–
Skip condition
Continuous
description
Operation:
(X) ← x x = 0 to 15
(Y) ← y y = 0 to 15
Grouping: RAM addresses
Description: Loads the value x in the immediate field to
register X, and the value y in the immediate
field to register Y. When the LXY instruc-
tions are continuously coded and executed,
only the first LXY instruction is executed
and other LXY instructions coded continu-
ously are skipped.
Rev.2.01 Feb 04, 2005
REJ09B0195-0201
1-66