MC81F4104M datasheet(49/118 Pages) FINECHIPS

49 / 118 page

MC81F4104

October 19, 2009 Ver.1.35

49

:

;When G = 0, X = 0F5h

LDA 45h + X ;op code is 0C6h

:

;

:

;

:

Y indexed direct page (8 bit offset) → dp+Y

This address value is the second byte (Operand) of command plus the data of Y-register, which

assigns Memory in Direct page.

This is same with above

„X indexed direct page‟. Use Y register instead of X.

Y indexed absolute

→ !abs+Y

Accessing the value of 16-bit absolute address plus Y-register value. This addressing mode can

specify memory in whole area.

Example :

:

;when Y = 55h

LDA !0FA00H+Y

;op code is D5h

:

Indirect Addressing

Direct page indirect

→ [dp]

Assigns data address to use for accomplishing command which sets memory data (or pair memory) by

Operand.

Also index can be used with Index register X,Y.

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