TMS320F datasheet(333/389 Pages) TI

333 / 389 page

B-1

Appendix A

Submitting ROM Codes to TI

The size of a printed circuit board is a consideration in many DSP applications.

To make full use of the board space, Texas Instruments offers a ROM code

option that reduces the chip count and provides a single-chip solution. This

option allows you to use a code-customized processor for a specific applica-

tion while taking advantage of:

- Greater memory expansion

- Lower system cost

- Less hardware and wiring

- Smaller PCB

If a routine or algorithm is used often, it can be programmed into the on-chip

ROM of a TMS320 DSP. TMS320 programs can also be expanded by using

external memory; this reduces chip count and allows for a more flexible pro-

gram memory. Multiple functions are easily implemented by a single device,

thus enhancing system capabilities.

TMS320 development tools are used to develop, test, refine, and finalize the

algorithms. The microprocessor/microcomputer (MP/MC) mode is available

on some ROM-coded TMS320 DSP devices when accesses to either on-chip

or off-chip memory are required. The microprocessor mode is used to develop,

test, and refine a system application. In this mode of operation, the TMS320

acts as a standard microprocessor by using external program memory. When

the algorithm has been finalized, the code can be submitted to Texas Instru-

ments for masking into the on-chip program ROM. At that time, the TMS320

becomes a microcomputer that executes customized programs from the on-

chip ROM. Should the code need changing or upgrading, the TMS320 can

once again be used in the microprocessor mode. This shortens the field-

upgrade time and prevents the possibility of inventory obsolescence.

Figure B–1 illustrates the procedural flow for developing and ordering

TMS320 masked parts. When ordering, there is a one-time, nonrefundable

charge for mask tooling. A minimum production order per year is required for

any masked-ROM device. ROM codes will be deleted from the TI system one

year after the final delivery.

Appendix B

TMS320F Datasheet(PDF) 333 Page - Texas Instruments