Texas Instruments TMS320C2XX User Manual
Page 178
Add to Accumulator
ADD
7-25
Assembly Language Instructions
Cycles for a Single ADD Instruction (Using Direct and Indirect Addressing)
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 ADD Instruction (Using Direct
and Indirect Addressing)
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
Cycles for a Single ADD Instruction (Using Short Immediate Addressing)
ROM
DARAM
SARAM
External
1
1
1
1+p
Cycles for a Single ADD Instruction (Using Long Immediate Addressing)
ROM
DARAM
SARAM
External
2
2
2
2+2p
Example 1
ADD
1,1
;(DP = 6)
Before Instruction
After Instruction
Data Memory
Data Memory
301h
1h
301h
1h
ACC
X
2h
ACC
0
04h
C
C
Example 2
ADD
*+,0,AR0
Before Instruction
After Instruction
ARP
4
ARP
0
AR4
0302h
AR4
0303h
Data Memory
Data Memory
302h
2h
302h
2h
ACC
X
2h
ACC
0
04h
C
C
Cycles