4553 datasheet(93/145 Pages) RENESAS

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Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Skip condition

Number of

cycles

Number of

words

Instruction

code

Flag CY

Rev.3.02

Dec 22, 2006

page 93 of 142

REJ03B0024-0302

4553 Group

SZB j (Skip if Zero, Bit)

00001000j

02j

–

(Mj(DP)) = 0

j = 0 to 3

Grouping:

Bit operation

Description: Skips the next instruction when the con-

tents of bit j (bit specified by the value j in

the immediate field) of M(DP) is “0.”

Executes the next instruction when the con-

tents of bit j of M(DP) is “1.”

Operation:

(Mj(DP)) = 0 ?

j = 0 to 3

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

0000100100

024

–

(D(Y)) = 0

(Y) = 0 to 7

Grouping:

Input/Output operation

Description: Skips the next instruction when a bit of port

D specified by register Y is “0.” Executes the

next instruction when the bit is “1.”

Note:

(Y) = 0 to 5.

Do not execute this instruction if values ex-

cept above are set to register Y.

T1AB (Transfer data to timer 1 and register R1 from Accumulator and register B)

1000110000

230

–

Grouping:

Timer operation

Description: Transfers the contents of register B to the

high-order 4 bits of timer 1 and timer 1 re-

load register R1. Transfers the contents of

and timer 1 reload register R1.

Operation:

(T17–T14)

← (B)

(R17–R14)

← (B)

(T13–T10)

← (A)

(R13–R10)

← (A)

Operation:

(D(Y)) = 0 ?

(Y) = 0 to 7

0000101011

02B

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SZC (Skip if Zero, Carry flag)

0000101111

02F

–

(CY) = 0

Grouping:

Arithmetic operation

Description: Skips the next instruction when the con-

tents of carry flag CY is “0.”

After skipping, the CY flag remains un-

changed.

Executes the next instruction when the con-

tents of the CY flag is “1.“

Operation:

(CY) = 0 ?

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