4583 Datasheet, PDF (120/153 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4583 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
TYA (Transfer data to register Y from Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
0
0
0
0
0
0
1
1
0
0
2
0
0
C ₁₆
1
1
–
Skip condition
–
Operation: (Y) ← (A)
Grouping: Register to register transfer
Description: Transfers the contents of register A to regis-
ter Y.
WRST (Watchdog timer ReSeT)
Instruction
code
D9
D0
Number of Number of Flag CY
words
cycles
1
0
1
0
1
0
0
0
0
0
2
2
A
0 ₁₆
1
1
–
Skip condition
(WDF1) = 1
Operation:
(WDF1) = 1 ?
After skipping, (WDF1) ← 0
Grouping: Other operation
Description: Skips the next instruction when watchdog
timer flag WDF1 is “1.” After skipping, clears
(0) to the WDF1 flag. When the WDF1 flag
is “0,” executes the next instruction. Also,
stops the watchdog timer function when ex-
ecuting the WRST instruction immediately
after the DWDT instruction.
XAM j (eXchange Accumulator and Memory data)
Instruction D9
D0
Number of Number of Flag CY
code
words
cycles
1 0 1 1 0 1 j j j j ₂ 2 D j ₁₆
1
1
–
Skip condition
–
Operation:
(A) ←→ (M(DP))
(X) ← (X)EXOR(j)
j = 0 to 15
Grouping: RAM to register transfer
Description: After exchanging the contents of M(DP)
with the contents of register A, an exclusive
OR operation is performed between regis-
ter X and the value j in the immediate field,
and stores the result in register X.
XAMD j (eXchange Accumulator and Memory data and Decrement register Y and skip)
Instruction D9
D0
Number of Number of Flag CY
code
words
cycles
1 0 1 1 1 1 j j j j ₂ 2 F j ₁₆
1
1
–
Skip condition
(Y) = 15
Operation:
(A) ←→ (M(DP))
(X) ← (X)EXOR(j)
j = 0 to 15
(Y) ← (Y) – 1
Grouping: RAM to register transfer
Description: After exchanging the contents of M(DP)
with the contents of register A, an exclusive
OR operation is performed between regis-
ter X and the value j in the immediate field,
and stores the result in register X.
Subtracts 1 from the contents of register Y.
As a result of subtraction, when the con-
tents of register Y is 15, the next instruction
is skipped. When the contents of register Y
is not 15, the next instruction is executed.
Rev.3.00 Aug 06, 2004 page 120 of 151
REJ03B0009-0300Z