User manual

Chapter 11
SPRUEP9A – May 2008
Boot Modes
The TMS320DM646x DMSoC ARM can boot either from asynchronous EMIF/NOR Flash or from ARM
ROM, as determined by the device configuration pins (BTMODE[3:0], CS2_BW, PCIEN, and DSP_BT) at
reset. The PCIEN pin configuration is used to select the default configuration of the EMIFA/PCI/HPI pins
at reset. This allows the DM646x DMSoC to be PCI-compliant at reset. PCIEN = 1 disables the internal
pullup and pulldown resistors on the PCI pins and configures the pin muxing for PCI. For all other
bootmodes (non-PCI bootmode), the PCIEN must be cleared to 0.
For a more detailed description of the ROM boot modes supported by the DM646x DMSoC, see Using the
TMS320DM6467 DMSoC Bootloader (SPRAAS0 ).
SPRUEP9A – May 2008 Boot Modes 121
Submit Documentation Feedback