4571 datasheet(86/126 Pages) RENESAS

86 / 126 page

Rev.1.02

May 25, 2007

Page 86 of 124

REJ03B0179-0102

4571 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

SUPT

(Set UPT flag)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

101

01 2 05 9 16

Opera-

tion:

(UPTF)

←1

Grouping:

Other operation

Description: Sets (1) to the high-order bit reference enable flag UPTF.

Note:

When the table reference instruction (TABP p) is executed,

the high-order 2 bits of ROM reference data is transferred

to the low-order 2 bits of register D.

SZB j

(Skip if Zero, Bit)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

010

(Mj(DP)) = 0

j = 0 to 3

Opera-

tion:

(Mj(DP)) = 0 ?

j = 0 to 3

Grouping:

Bit operation

Description: Skips the next instruction when the contents of bit j (bit

specified by the value j in the immediate field) of M(DP) is

“0”.

Executes the next instruction when the contents of bit j of

M(DP) is “1”.

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 4.

Do not execute this instruction if values except above are

set to register Y.

Opera-

tion:

(D(Y)) = 0 ?

(Y) = 0 to 4

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