TMS320VC5506 datasheet(33/120 Pages) TI

33 / 120 page

Functional Overview

October 2006 − Revised January 2008

SPRS375C

3.1.5 Boot Configuration

The on-chip bootloader provides a method to transfer application code and tables from an external source to

the on-chip RAM memory at power up. These options include:

•

External asynchronous memory boot (via the EMIF) from 8-bit-wide or 16-bit-wide memory

•

Serial port boot (from McBSP0) with 8-bit or 16-bit data length

•

Serial EPROM boot (from McBSP0) supporting EPROMs with 16-bit or 24-bit address

•

USB boot

•

I2C EEPROM

•

Direct execution from external 16-bit-wide asynchronous memory

External pins select the boot configuration. The values of GPIO[3:0] are sampled, following reset, upon

execution of the on-chip bootloader code. It is not possible to disable the bootloader at reset because the 5506

always starts execution from the on-chip ROM following a hardware reset. A summary of boot configurations

is shown in Table 3−3. For more information on using the bootloader, see the Using the

TMS320VC5503/VC5507/VC5509/VC5509A Bootloader application report (literature number SPRA375).

Table 3−3. Boot Configuration Summary

GPIO0

GPIO3

GPIO2

GPIO1

BOOT MODE PROCESS

Reserved

Serial (SPI) EPROM Boot (24-bit address) via McBSP0

USB

I2C EEPROM (7-bit address)

Reserved

Execute from 16-bit-wide asynchronous memory (on CE1 space)

Serial (SPI) EPROM Boot (16-bit address) via McBSP0

8-bit asynchronous memory (on CE1 space)

16-bit asynchronous memory (on CE1 space)

Reserved

Standard serial boot via McBSP0 (16-bit data)

Standard serial boot via McBSP0 (8-bit data)

TMS320VC5506 Datasheet(PDF) 33 Page - Texas Instruments