Motorola HC12 Manuale Utente

User’s Manual

MCUez HC12 Assembler

234

Operating Procedures

MOTOROLA

Symbols that are defined in the predefined section BSCT are always accessed
using the direct addressing mode.

Example:

…

     BSCT

DirLabel: DS.B 3

dataSec: SECTION

ExtLabel: DS.B 5

…

codeSec: SECTION

…

     LDD   DirLabel ; Direct addressing mode is used

…

     LDD   ExtLabel ; Extended addressing mode is used

A force operator can be specified in an assembly instruction to force direct or
extended addressing mode.

The supported force operators are:

•

<

 or

.B

 to force direct addressing mode

•

>

 or

.W

 to force extended addressing mode

Example:

…

dataSec: SECTION

label: DS.B 5

…

codeSec: SECTION

…

     LDD   <label ; Direct addressing mode is used

     LDD   label.B; Direct addressing mode is used

…

     LDD   >label ;  Extended addressing mode is used

     LDD   label.W ; Extended addressing mode is used