beautypg.com

Popd – Texas Instruments TMS320C2XX User Manual

Page 290

background image

Pop Top of Stack to Data Memory

POPD

7-137

Assembly Language Instructions

Syntax

POPD

dma

Direct addressing

POPD

ind [, ARn]

Indirect addressing

Operands

dma:

7 LSBs of the data-memory address

n:

Value from 0 to 7 designating the next auxiliary register

ind:

Select one of the following seven options:
* *+ *– *0+ *0– *BR0+ *BR0–

POPD

dma

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

1

0

0

0

1

0

1

0

0

dma

POPD

ind [,ARn]

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

1

0

0

0

1

0

1

0

1

ARU

N

NAR

Note:

ARU, N, and NAR are defined in Section 6.3,

Indirect Addressing Mode (page 6-9).

Execution

Increment PC, then ...
(TOS)

data-memory address

Pop stack one level

Status Bits

None

Description

The value from the top of the stack is transferred into the data-memory location
specified by the instruction. In the lower seven locations of the stack, the val-
ues are copied up one level. The stack operation is explained in the description
for the POP instruction. No provision exists to check stack underflow.

Words

1

Cycles for a Single POPD Instruction

Program

Operand

ROM

DARAM

SARAM

External

DARAM

1

1

1

1+p

SARAM

1

1

1, 2

1+p

External

2+d

2+d

2+d

4+d+p

† If the operand and the code are in the same SARAM block

Opcode

Cycles