4559 datasheet(102/148 Pages) RENESAS

102 / 148 page

Rev.1.04

Aug 23, 2007

Page 102 of 146

REJ03B0188-0104

4559 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SZC

(Skip if Zero, Carry flag )

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

010

11 2 02 F 16

(CY) = 0

Opera-

tion:

(CY) = 0 ?

Grouping:

Arithmetic operation

Description: Skips the next instruction when the contents of carry flag

CY is “0”.

After skipping, the CY flag remains unchanged.

Executes the next instruction when the contents of the CY

flag is “1”.

SZD

(Skip if Zero, port D specified by register Y)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

010

00 2 02 4 16

(D(Y)) = 0

010

11 2 02 B 16 Grouping:

Input/Output operation

Description: Skips the next instruction when a bit of port D specified by

is “1”.

Note:

(Y) = 0 to 5.

Do not execute this instruction if values except above are

set to register Y.

Opera-

tion:

(D(Y)) = 0 ?

(Y) = 0 to 5

T1AB

(Transfer data to timer 1 and register R1 from Accumulator and register B)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

011

00 2 23 0 16

Opera-

tion:

(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 reload register R1. Transfers the

contents of register A to the low-order 4 bits of timer 1 and

timer 1 reload register R1.

T2AB

(Transfer data to timer 2 and register R2L from Accumulator and register B)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

011

01 2 23 1 16

Opera-

tion:

(T27

−T24) ← (B)

(R2L7

−R2L4) ← (B)

(T23

−T20) ← (A)

(R2L3

−R2L0) ← (A)

Grouping:

Timer operation

Description: Transfers the contents of register B to the high-order 4 bits

(T27

−T24) of timer 2 and the high-order 4 bits (R2L7−R2L4)

of timer 2 reload register R2L. Transfers the contents of

−T20) of timer 2 and

the low-order 4 bits (R2L3

−R2L0) of timer 2 reload register

R2.

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