4501 datasheet(89/116 Pages) RENESAS

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4501 Group

Rev.3.01

2005.02.07

page 89 of 112

REJ03B0104-0301

XAM j (eXchange Accumulator and Memory data)

101101

jjjj

–

Grouping:

RAM to register transfer

Description: After exchanging the contents of M(DP)

with the contents of register A, an exclusive

OR operation is performed between regis-

ter X and the value j in the immediate field,

and stores the result in register X.

XAMD j (eXchange Accumulator and Memory data and Decrement register Y and skip)

101111

jjjj

–

(Y) = 15

Grouping:

RAM to register transfer

Description: After exchanging the contents of M(DP)

with the contents of register A, an exclusive

OR operation is performed between regis-

ter 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 con-

tents of register Y is 15, the next instruction

is skipped. When the contents of register Y

is not 15, the next instruction is executed.

Operation:

(A)

←→ (M(DP))

(X)

← (X)EXOR(j)

j = 0 to 15

(Y)

← (Y) – 1

Operation:

(A)

←→ (M(DP))

(X)

← (X)EXOR(j)

j = 0 to 15

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

XAMI j (eXchange Accumulator and Memory data and Increment register Y and skip)

101110

jjjj

–

(Y) = 0

Grouping:

RAM to register transfer

Description: After exchanging the contents of M(DP)

with the contents of register A, an exclusive

OR operation is performed between regis-

ter 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 re-

sult 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.

Operation:

(A)

←→ (M(DP))

(X)

← (X)EXOR(j)

j = 0 to 15

(Y)

← (Y) + 1

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