TMS320F datasheet(117/389 Pages) TI

117 / 389 page

How To Use the Instruction Descriptions

7-17

Assembly Language Instructions

If an instruction requires memory operand(s), the rows in the table indicate the

location(s) of the operand(s), as defined here:

DARAM

The operand is in internal dual-access RAM.

SARAM

The operand is in internal single-access RAM.

External

The operand is in external memory.

For the RPT mode execution,

n indicates the number of times a given instruc-

tion is repeated by an RPT instruction. Additional cycles (wait states) can be

generated for program-memory, data-memory, and I/O accesses by the wait-

state generator or by the external READY signal. These additional wait states

are represented in the tables by the following variables:

Program-memory wait states. Represents the number of addition-

al clock cycles the device waits for external program memory to

respond to a single access.

Data-memory wait states. Represents the number of additional

clock cycles the device waits for external data memory to respond

to a single access.

I/O wait states. Represents the number of additional clock cycles

the device waits for an external I/O device to respond to a single

access.

Number of repetitions (where

n > 2 to fill the pipeline). Represents

the number of times a repeated instruction is executed.

If there are multiple accesses to one of the spaces, the variable is preceded

by the appropriate integer multiple. For example, two accesses to external pro-

gram memory would require 2p wait states. The above variables may also use

the subscripts

src, dst, and code to indicate source, destination, and code,

respectively.

The internal single-access memory on each ’C240 processor is divided into

2K-word blocks contiguous in address space. All ’C240 processors support

parallel accesses to these internal single-access RAM blocks. Furthermore,

one single access block allows only one access per cycle. Thus, the processor

can read/write on single-access RAM block while accessing another single-

access RAM block at the same time.

TMS320F Datasheet(PDF) 117 Page - Texas Instruments