4501 datasheet(100/212 Pages) RENESAS

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INSTRUCTIONS

1-88

Rev.2.01

Feb 07, 2005

4501 Group

HARDWARE

REJ09B0192-0201

TW2A (Transfer data to register W2 from Accumulator)

1000001111

20F

––

Grouping:

Timer operation

Description: Transfers the contents of register A to timer

control register W2.

Operation:

(W2)

← (A)

TW6A (Transfer data to register W6 from Accumulator)

1000010011

213

–

Grouping:

Timer operation

Description: Transfers the contents of register A to timer

control register W6.

Operation:

(W6)

← (A)

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

TYA (Transfer data to register Y from Accumulator)

0000001100

00C

–

Grouping:

Description: Transfers the contents of register A to regis-

ter Y.

Operation:

(Y)

← (A)

WRST (Watchdog timer ReSeT)

1010100000

–

(WDF1) = 1

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.

Operation:

(WDF1) = 1 ?

After skipping, (WDF1)

← 0

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