DSP Subsystem Reference Guide

Chapter 11
SPRU978E – March 2008
Boot Modes
The TMS320DM643x DMP can boot from either asynchronous EMIF/NOR Flash directly or from internal
boot ROM, as determined by the setting of the device boot and configuration pins. The input states of the
boot and configuration pins are sampled and latched into the BOOTCFG register when device reset is
deasserted. Refer to the device-specific data manual for the list of boot and configuration pins and a list of
boot modes supported on the DM643x DMP.
In all boot modes, the C64x+ CPU is immediately released from reset and begins executing from one of
the two possible addresses:
• EMIFA Chip Select Space 2 (4200 0000h)
• Internal Boot ROM (0010 0000h)
For the boot modes that start at the internal boot ROM, the ROM Boot Loader (RBL) software is
responsible for completing the boot sequence. See Using the TMS320DM643x Bootloader (SPRAAG0 ) for
more details on the ROM Boot Loader.
SPRU978E – March 2008 Boot Modes 95
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