TMS320F datasheet(38/389 Pages) TI

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Program Memory

3-5

Memory and I/O Spaces

3.2.1

Program Memory Configuration

Depending on which types of memory are included in a particular ’C24x de-

vice, two factors contribute to the configuration of program memory:

- CNF bit. The CNF bit (bit 12) of status register ST1 determines whether

the addresses for DARAM B0 are available for program space:

J CNF = 0. There is no addressable on-chip program DARAM.

J CNF = 1. The 256 words of DARAM B0 are configured for program

use. At reset, any words of program/data DARAM are mapped into lo-

cal data space (CNF = 0).

- MP/MC pin. The level on the MP/MC pin determines whether program

instructions are read from on-chip ROM or flash EEPROM (if available) af-

ter reset:

J MP/MC = 0. The device is configured as a microcomputer. The on-

chip ROM/flash EEPROM is accessible. The device fetches the reset

vector from on-chip memory.

J MP/MC = 1. The device is configured as a microprocessor. The device

fetches the reset vector from external memory.

Regardless of the value of MP/MC, the ’C24x fetches its reset vector at

location 0000h of program memory.

TMS320F Datasheet(PDF) 38 Page - Texas Instruments