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Texas Instruments TMS320C2XX User Manual

Page 235

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LAR

Load Auxiliary Register

7-82

Example 1

LAR

AR0,16

;(DP = 6: addresses 0300h–037Fh)

Before Instruction

After Instruction

Data Memory

Data Memory

310h

18h

310h

18h

AR0

6h

AR0

18h

Example 2

LAR

AR4,*–

Before Instruction

After Instruction

ARP

4

ARP

4

Data Memory

Data Memory

300h

32h

300h

32h

AR4

300h

AR4

32h

Note:

LAR in the indirect addressing mode ignores any AR modifications if the AR
specified by the instruction is the same as that pointed to by the ARP. There-
fore, in Example 2, AR4 is not decremented after the LAR instruction.

Example 3

LAR

AR4,#01h

Before Instruction

After Instruction

AR4

0FF09h

AR4

01h

Example 4

LAR

AR6,#3FFFh

Before Instruction

After Instruction

AR6

0h

AR6

3FFFh