4571 datasheet(104/126 Pages) RENESAS

104 / 126 page

Rev.1.02

May 25, 2007

Page 104 of 124

REJ03B0179-0102

4571 Group

Skip condition

Detailed description

−−

Transfers the contents of register B to register A.

−−

Transfers the contents of register A to register B.

−−

Transfers the contents of register Y to register A.

−−

Transfers the contents of register A to register Y.

−−

Transfers the contents of register B to the high-order 4 bits (E3

−E0) of register E, and the contents of register

A to the low-order 4 bits (E3

−E0) of register E.

−−

Transfers the high-order 4 bits (E7

−E4) of register E to register B, and low-order 4 bits of register E to register

−−

Transfers the contents of the low-order 3 bits (A2

−A0) of register A to register D.

−−

Transfers the contents of register D to the low-order 3 bits (A2

−A0) of register A.

“0” is stored to the bit 3 (A3) of register A.

−−

Transfers the contents of register Z to the low-order 2 bits (A1, A0) of register A.

“0” is stored to the high-order 2 bits (A3, A2) of register A.

−−

Transfers the contents of register X to register A.

−−

Transfers the contents of stack pointer (SP) to the low-order 3 bits (A2

−A0) of register A.

“0” is stored to the bit 3 (A3) of register A.

Continuous

description

−

Loads the value x in the immediate field to register X, and the value y in the immediate field to register Y.

When the LXY instructions are continuously coded and executed, only the first LXY instruction is executed

and other LXY instructions coded continuously are skipped.

−−

Loads the value z in the immediate field to register Z.

(Y) = 0

−

Adds 1 to the contents of register Y. As a result of addition, when the contents of register Y is 0, the next

instruction is skipped. When the contents of register Y is not 0, the next instruction is executed.

(Y) = 15

−

Subtracts 1 from the contents of register Y. As a result of subtraction, when the contents of register Y is 15,

the next instruction is skipped. When the contents of register Y is not 15, the next instruction is executed.

−−

After transferring the contents of M(DP) to register A, an exclusive OR operation is performed between

−−

After exchanging the contents of M(DP) with the contents of register A, an exclusive OR operation is

performed between register X and the value j in the immediate field, and stores the result in register X.

(Y) = 15

−

After exchanging the contents of M(DP) with the contents of register A, an exclusive OR operation is

performed between register X and the value j in the immediate field, and stores the result in register X.

Subtracts 1 from the contents of register Y. As a result of subtraction, when the contents of register Y is 15,

the next instruction is skipped. When the contents of register Y is not 15, the next instruction is executed.

(Y) = 0

−

After exchanging the contents of M(DP) with the contents of register A, an exclusive OR operation is

performed between register X and the value j in the immediate field, and stores the result in register X.

Adds 1 to the contents of register Y. As a result of addition, when the contents of register Y is 0, the next

instruction is skipped. when the contents of register Y is not 0, the next instruction is executed.

−−

After transferring the contents of register A to M(DP), an exclusive OR operation is performed between

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