TMS320F datasheet(168/389 Pages) TI

168 / 389 page

Input Data From Port

7-68

Syntax

dma, PA

Direct addressing

ind, PA [, ARn]

Indirect addressing

Operands

dma:

7 LSBs of the data-memory address

Value from 0 to 7 designating the next auxiliary register

PA:

16-bit I/O port or I/O-mapped register address

ind:

Select one of the following seven options:

*–

*0+

*0–

*BR0+

*BR0–

dma , PA

987

6543

210

dma

ind ,PA [,ARn]

987

6543

210

ARU

NAR

Note:

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

Indirect Addressing Mode (page 6-9).

Execution

Increment PC, then ...

→ address bus lines A15–A0

Data bus lines D15–D0

→ data-memory address

(PA)

→ data-memory address

Status Bits

None

Description

The IN instruction reads a 16-bit value from an I/O location into the specified

data-memory location. The IS line goes low to indicate an I/O access. The

STRB, RD, and READY timings are the same as for an external data-memory

read.

The repeat (RPT) instruction can be used with the IN instruction to read in con-

secutive words from I/O space to data space.

Words

Opcode

TMS320F Datasheet(PDF) 168 Page - Texas Instruments

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