4524 Datasheet, PDF (130/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
TW5A (Transfer data to register W5 from Accumulator)
Instruction D9
D0
code
1000010010
21
2
2
16
Number of
words
1
Number of Flag CY
cycles
1
–
Skip condition
–
Operation: (W5) ← (A)
Grouping: Timer operation
Description: Transfers the contents of register A to timer
control register W5.
TW6A (Transfer data to register W6 from Accumulator)
Instruction D9
D0
code
1 0 0 0 0 1 0 0 1 1₂ 2 1
3 ₁₆
Number of
words
1
Number of Flag CY
cycles
1
–
Skip condition
–
Operation: (W6) ← (A)
Grouping: Timer operation
Description: Transfers the contents of register A to timer
control register W6.
TYA (Transfer data to register Y from Accumulator)
Instruction
code
D9
D0
Number of Number of Flag CY
0000001100
00C
words
cycles
2
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
1010100000
2 A0
words
cycles
2
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.
Rev.2.00 Jul 27, 2004 page 130 of 159
REJ03B0091-0200Z