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Hello Phillip The VC33 bootloader is an assembly level program that is contained in an on-chip ROM that it enabeled when MCBL/MP=1. The source code and an explanation of how the bootloader works is given in the TMS320C3x users guide. I have a feeling that you may be new to the TMS320C3x family, so it may be worth pointing out that all TMS320C31 documentation is applicable to the TMS320VC33. The TMS320VC33 is essentially a TMS320C31 that has been reprocessed in the latest CMOS technology, plus some healthy increases in on-chip RAM and other features. If you are using the VC33 DSK, it will either bootload from the host PC or the on board 8-bit FeRAM. The FeRAM boot can be initiated by setting the appropriate jumpers and a switch or through simulated PC control. FeRAM is a type of 'enhanced flash' technology from Ramtron international (www.ramtron.com) Best regards Keith Larson ------------------------------- At 09:27 AM 11/28/03 -0000, you wrote: Hi.... I traying to boot my VC33 from a 8-Bit flash-memory with the on-chip bootloader. Does the on chip bootloader copy my program from the flash automatically to the VC33 in the MCBL mode...or do I need to write that by my self? Does somebody have a example for the VC33....? Or can somebody tell me step by step what I have to do..? thanks... +-----------+ |Keith Larson | |Member Group Technical Staff | |Texas Instruments Incorporated | | | | 281-274-3288 | | | | www.micro.ti.com/~klarson | |-----------+ | TMS320C3x/C4x/VC33 Applications | | | | TMS320VC33 | | The lowest cost and lowest power 500 w/Mflop | | floating point DSP on the planet! | +-----------+ |