Motorola HC12 - Manual (Page 287)

Assembler Messages
Message Codes
MCUez HC12 Assembler User’s Manual
MOTOROLA Assembler Messages 287
12.3.47 A12003: Value is Truncated to One Byte
Type: Warning
Description: A word operand is specified in an assembly instruction
expecting a byte operand. This warning may be generated in
the following cases:
• A symbol located in a section, which is accessed using the
extended addressing mode, is specified as an operand in an
instruction expecting a direct operand.
• An external symbol imported using XREF is specified as an
operand in an instruction expecting a direct operand.
• The mask specified in BCLR, BSET, BRCLR, or BRSET is
bigger than 0xFF.
Example:
XREF extData
dataSec: SECTION
data: DS.B 1
data2: DS.B 1
destination: DS.W 1
codeSec: SECTION
MOVB #data, destination
MOVB #data, destination
MOVB #extData, destination
BCLR data, #$54F
Tip: According to the reason why the warning was generated, the
warning can be avoided as follows:
• Specify the force operator .B at the end of the operand or <
in front of the operand.
• Use XREF.B to import the symbol.
Example:
XREF.B extData
dataSec: SECTION
data: DS.B 1
data2: DS.B 1
destination: DS.W 1
codeSec: SECTION
MOVB #data.B, destination
MOVB #extData, destination
BCLR data, #$4F