Memory booting
Initialization
and
Device detection
Set first / next valid block
Read a sector
Return
fail
Copying failed
No more sectors to read
Device detection
Initialization failed
No more blocks
Loading Initial SW
Completed?
Store the loaded sector with
Initial SW in the target buffer
Initial SW execution
No
Yes
Functional Description
26.1.7.2.3 Sysboot Pins
Some of the SYSBOOT pins have special meanings when NOR boot is selected.
Table 26-11. Special SYSBOOT Pins for NOR Boot
SYSBOOT[n]
Description
0 = 8-bit device
[8]
1 = 16-bit device
00b = Non-muxed device
[11:10]
10b = Muxed device
x1b = Reserved
26.1.7.3 Image Shadowing for Non-XIP Memories
26.1.7.3.1 Shadowing on GP Device
The GP Device shadowing uses the following approach.
Figure 26-10. Image Shadowing on GP Device
26.1.7.4 NAND
The NAND flash memory is not XIP and requires shadowing before the code can be executed.
26.1.7.4.1 Features
•
Uses GPMC as the communication interface
•
Device from 512Mbit (64MByte)
•
x8 and x16 bus width
•
Support for large page size (2048 bytes + 64 spare bytes) or very large page size 4096 bytes + 128 /
218 spare bytes)
4118
Initialization
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated