Table of Contents
Advertisement
www.ti.com
21.9 Image Format
21.9.1 Overview
All preceding sections describe how the ROM Code searches and detects a boot image from a memory
or a peripheral device type. This section describes the format of the boot image itself.
A boot image is basically made out of two major parts:
•
The software to execute
The mandatory section of a boot image contains the software that will be loaded into the memory and
executed. An overview of the image formats is shown in
a) GP device
non-XIP Memory Booting
GP Image Header
Initial Software
(a) GP non - XIP Memory Booting
Image must begin with a GP header that contains information on image size and destination
address
(b) GP Peripheral Booting and XIP Memory Booting
When memory device is of XIP type (for example, NOR), the GP header is not needed and the
image can contain code for direct execution. The same image format is used for peripheral booting
(where the code is transferred to internal RAM).
SPRUGX9 – 15 April 2011
Submit Documentation Feedback
Preliminary
Figure
Figure 21-24. Image Formats
b) GP device
Peripheral Booting and XIP Memory Booting
Initial Software
© 2011, Texas Instruments Incorporated
21-24.
Legend:
mandatory
optional
* Must fit into one
512 bytes sector
ROM Code Memory and Peripheral Booting
Image Format
2027
Advertisement
Table of Contents
