Texas Instruments TMS320C2XX - Manual (Page 254)

Load TREG and Subtract Previous Product LTS
7-101 Assembly Language Instructions
Cycles for a Repeat (RPT) Execution of an LTS Instruction
Program
Operand ROM DARAM SARAM External
DARAM n n n n+p
SARAM n n n, n+1 † n+p
External n+nd n+nd n+nd n+1+p+nd
† If the operand and the code are in the same SARAM block
Example 1 LTS DAT36 ;(DP = 6: addresses 0300h–037Fh,
;PM = 0: no shift of product)
Before Instruction After Instruction
Data Memory Data Memory
324h 62h 324h 62h
TREG 3h TREG 62h
PREG 0Fh PREG 0Fh
ACC X 05h ACC 0 0FFFFFFF6h
C C
Example 2 LTS *,AR2 ;(PM = 0)
Before Instruction After Instruction
ARP 1 ARP 2
AR1 324h AR1 324h
324h 62h 324h 62h
TREG 3h TREG 62h
PREG 0Fh PREG 0Fh
ACC X 05h ACC 0 0FFFFFFF6h
C C