Filter
Top Products
LTA
Load TREG and Accumulate Previous Product
7-94
Cycles for a Repeat (RPT) Execution of an LTA 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 LTA 36 ;(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 5h ACC 0 14h
CC
Example 2 LTA *,AR5 ;(PM = 0)
Before Instruction After Instruction
ARP 4 ARP 5
AR4 324h AR4 324h
Data Memory Data Memory
324h 62h 324h 62h
TREG 3h TREG 62h
PREG 0Fh PREG 0Fh
ACC X 5h ACC 0 14h
CC