Texas Instruments TMS320C2XX User Manual

Page 287

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PAC

Load Accumulator With Product Register

7-134

Syntax

PAC

Operands

None

Opcode

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

1

1

0

0

0

0

0

0

0

1

1

1

1

1

0

1

Execution

Increment PC, then ...
shifted (PREG)

→

ACC

Status Bits

Affected by
PM

Description

The content of PREG, shifted as specified by the PM status bits, is loaded into
the accumulator.

Words

1

Cycles for a Single PAC Instruction

ROM

DARAM

SARAM

External

1

1

1

1+p

Cycles for a Repeat (RPT) Execution of a PAC Instruction

ROM

DARAM

SARAM

External

n

n

n

n+p

Example

PAC

;(PM = 0: no shift of product)

Before Instruction

After Instruction

PREG

144h

PREG

144h

ACC

X

23h

ACC

X

144h

C

C

Cycles

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