TMS320F datasheet(154/389 Pages) TI

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BLPD

Block Move From Program Memory to Data Memory

7-54

Description

A word in program memory pointed to by the

source is copied to data-memory

space pointed to by

destination. The first word of the source space is pointed

to by a long-immediate value. The data-memory destination space is pointed

to by a data-memory address or auxiliary register pointer. Not all source/des-

tination combinations of pointer types are valid.

RPT can be used with the BLPD instruction to move consecutive words. The

number of words to be moved is one greater than the number contained in the

repeat counter (RPTC) at the beginning of the instruction. When the BLPD in-

struction is repeated, the source (program-memory) address specified by the

long immediate constant is stored to the PC. Because the PC is incremented

by 1 during each repetition, it is possible to access a series of program-

memory addresses. If you use indirect addressing to specify the destination

(data-memory) address, a new data-memory address can be accessed during

each repetition. If you use the direct addressing mode, the specified data-

memory address is a constant; it will not be modified during each repetition.

The source and destination blocks do not have to be entirely on chip or off chip.

Interrupts are inhibited during a repeated BLPD instruction. When used with

RPT, BLPD becomes a single-cycle instruction once the RPT pipeline is

started.

Words

TMS320F Datasheet(PDF) 154 Page - Texas Instruments