Texas Instruments TMS320C2XX - Manual (Page 232)

Load Accumulator With Shift Specified by TREG LACT
7-79 Assembly Language Instructions
Cycles for a Single LACT Instruction
Program
Operand ROM DARAM SARAM External
DARAM 1 1 1 1+p
SARAM 1 1 1, 2 † 1+p
External 1+d 1+d 1+d 2+d+p
† If the operand and the code are in the same SARAM block
Cycles for a Repeat (RPT) Execution of an LACT 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 LACT 1 ;(DP = 6: addresses 0300h–037Fh,
;SXM = 0)
Before Instruction After Instruction
Data Memory Data Memory
301h 1376h 301h 1376h
TREG 14h TREG 14h
ACC X 98F7EC83h ACC X 13760h
C C
Example 2 LACT *–,AR3 ;(SXM = 1)
Before Instruction After Instruction
ARP 1 ARP 3
AR1 310h AR1 30Fh
Data Memory Data Memory
310h 0FF00h 310h 0FF00h
TREG 11h TREG 11h
ACC X 098F7EC83h ACC X 0FFFFFE00h
C C
Cycles