HD404374FT datasheet(128/161 Pages) RENESAS

128 / 161 page

HD404374/HD404384/HD404389/HD404082/HD404084 Series

Rev.5.00, Sep.11.2003, page 128 of 161

Table 32

RAM Address Instructions

Operation

Mnemonic

Operation Code

Function

Status

Words/

Cycles

Load W from immediate

LWI i

0 0

1 1

1 1 0

→ W

1/1

Load X from immediate

LXI i

1 0

0 0

1 0 i

→ X

1/1

Load Y from immediate

LYI i

1 0

0 0

0 1 i

→ Y

1/1

Load W from A

LWA*

0 1

0 0

0 1 0

0 0

0 0 0

0 0

→ W

2/2*

Load X from A

LXA

0 0

1 1

1 0 1

0 0

→ X

1/1

Load Y from A

LYA

0 0

1 1

0 1 1

0 0

→ Y

1/1

Increment Y

0 0

0 1

0 1 1

0 0

Y + 1

→ Y

1/1

Decrement Y

0 0

1 1

0 1 1

1 1

Y – 1

→ Y

1/1

Add A to Y

AYY

0 0

0 1

0 1 0

0 0

Y + A

→ Y

OVF

1/1

Subtract A from Y

SYY

0 0

1 1

0 1 0

0 0

Y – A

→ Y

1/1

Exchange X and SPX

XSPX

0 0

0 0 0

0 1

↔ SPX

1/1

Exchange Y and SPY

XSPY

0 0

0 0 0

1 0

↔ SPY

1/1

Exchange X and SPX,

Y and SPY

XSPXY

0 0

0 0 0

1 1

↔ SPX,Y ↔ SPY

1/1

Note: * The assembler automatically provides an operand for the second word of the LAW and LWA

instruction.

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