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Hi all, I am trying to boot a c5402 with 8 bit serial. I have looked over the doc's on the c5402 and would like to know if there is a 1 bit delay between data sent to c5402 bootloader mode and the BCLKR1 clk. ^--------- Frame ^^^^^^^^^^ bclkr1 __xxxxxxxx Data or if it is ^--------- ^^^^^^... _X..... Thanks Caleb |
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Booting C5402 standard mode serial 8 bit?
Started by ●April 3, 2003
Reply by ●April 3, 20032003-04-03
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There is no delay, your second 'Diagram' is correct. After boot up it is important to send some extra clock's to the spi before you start to send your data. Georg -----Ursprgliche Nachricht----- Von: dsp_man_c54 [mailto:] Gesendet: Donnerstag, 3. April 2003 04:33 An: Betreff: [c54x] Booting C5402 standard mode serial 8 bit? Hi all, I am trying to boot a c5402 with 8 bit serial. I have looked over the doc's on the c5402 and would like to know if there is a 1 bit delay between data sent to c5402 bootloader mode and the BCLKR1 clk. ^--------- Frame ^^^^^^^^^^ bclkr1 __xxxxxxxx Data or if it is ^--------- ^^^^^^... _X..... Thanks Caleb _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to To Post: Send an email to To Leave: Send an email to Archives: http://www.yahoogroups.com/group/c54x Other Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/ |
Reply by ●April 4, 20032003-04-04
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In the case that you are using 8-bit standard serial boot mode: - connect boot device to McBSP1 (McBSP0 is used for 16-bit) - boot device must provide BCLKR slower than 1/2 CPU clock - it must also provide BFSR, and ensure that bit 7 (MSB) is sent on the falling edge of BFSR, so there's no delay. - bits per frame (BPF) must be greater than 20 BPF - only starts the sequence upon detection of low XF In the case that you are using 8-bit EEPROM, the requirement is different. C5402 uses SPI during bootloading in this mode. --- In , "dsp_man_c54" <austca@b...> wrote: > Hi all, > > I am trying to boot a c5402 with 8 bit serial. I have looked over > the doc's on the c5402 and would like to know if there is a 1 bit > delay between data sent to c5402 bootloader mode and the BCLKR1 clk. > > ^--------- Frame > ^^^^^^^^^^ bclkr1 > __xxxxxxxx Data > > or if it is > > ^--------- > ^^^^^^... > _X..... > > Thanks > > Caleb |
