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Texas Instruments TMS320C2XX User Manual

Page 258

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Multiply and Accumulate

MAC

7-105

Assembly Language Instructions

Cycles for a Repeat (RPT) Execution of an MAC Instruction (Continued)

Operand

External

SARAM

DARAM

ROM

Operand 1: DARAM/
ROM
Operand 2: SARAM

n+2

n+2

n+2

n+2+2p

code

Operand 1: SARAM
Operand 2: SARAM

n+2
2n+2

n+2
2n+2

n+2
2n+2

n+2+2p

code

2n+2

Operand 1: External
Operand 2: SARAM

n+2+np

op1

n+2+np

op1

n+2+np

op1

n+2+np

op1

+2p

code

Operand 1: DARAM/
ROM
Operand 2: External

n+2+nd

op2

n+2+nd

op2

n+2+nd

op2

n+2+nd

op2

+2p

code

Operand 1: SARAM
Operand 2: External

n+2+nd

op2

n+2+nd

op2

n+2+nd

op2

n+2+nd

op2

+2p

code

Operand 1: External
Operand 2: External

2n+2+np

op1

+

nd

op2

2n+2+np

op1

+nd

op2

2n+2+np

op1

+nd

op2

2n+2+np

op1

+nd

op2

+

2p

code

† If both operands are in the same SARAM block

Example 1

MAC

0FF00h,02h

;(DP = 6, PM = 0, CNF = 1)

Before Instruction

After Instruction

Data Memory

Data Memory

302h

23h

302h

23h

Program Memory

Program Memory

FF00h

4h

FF00h

4h

TREG 45h

TREG

23h

PREG

458972h

PREG

08Ch

ACC

X

723EC41h

ACC

0

76975B3h

C

C

Example 2

MAC

0FF00h,*,AR5

;(PM = 0, CNF = 1)

Before Instruction

After Instruction

ARP

4

ARP

5

AR4

302h

AR4

302h

Data Memory

Data Memory

302h

23h

302h

23h

Program Memory

Program Memory

FF00h

4h

FF00h

4h

TREG 45h

TREG

23h

PREG

458972h

PREG

8Ch

ACC

X

723EC41h

ACC

0

76975B3h

C

C