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Try MMC/SD Boot
Try MMC/SD Boot
Try MMC/SD Boot
Try MMC/SD Boot
Try MMC/SD Boot
MMC/SD
BTSEL[1:0] = 10
GIO61
Try MMC/SD Boot
Try MMC/SD Boot
Try MMC/SD Boot
Try MMC/SD Boot
Try NAND Boot
NAND Boot
BTSEL[1:0] = 00
GIO61
Try UART Boot
Try UART Boot
Try UART Boot
Try UART Boot
UART
BTSEL[1:0] = 11
GIO61
Boot Modes Overview
www.ti.com
–
Supports NAND flash that requires chip select to stay low during the tR read time
•
ARM ROM Boot - MMC/SD Mode
–
No support for a full firmware boot. Instead, copies a second stage Uwer Boot Loader (UBL) from
MMC/SD to ARm Internal RAM (AIM) and transfers control to the user software.
–
Support for MMC/SD Native protocol (MMC/SD SPI protocol is not supported)
–
Support for descriptor error detection and retry (up to 24 times) when loading UBL
–
Support for up to 30KB UBL (32KB - ~2KB for RBL stack)
•
ARM ROM Boot - UART mode
–
No support for a full firmware boot. Instead, loads a second stage user boot loader (UBL) via UART
to ARM internal RAM (AIM) and transfers control to the user software.
–
Support for up to 30KB UBL (32KB - ~2KB for RBL stack).
Figure 11-1. Boot Modes Overview
150
Boot Modes
SPRUFX7 – July 2008