Hi everybody I have a question about the spi on the MPC8260. I have written a driver for this controller but there is something in the MPC8260 documentation I don't understand:
It is written in MPC8260 documentation (SPI chapter) : " The maximum sustained data rate that the SPI supports is SYSTEMCLK/50. However the spi can transfer a single character at much higher rates (SYSTEMCLK/4 in master mode)". My really stupid question is ...... what is "SYSTEMCLK" ??????? is it the BRG_CLK ? the CPM_CLK or the CPU_CLK ???? Seeing that in the SPMODE register, the maximum SPI CLK possible is BRG_CLK/4, I imagine that this "SYSTEMCLK" is BRG_CLK, but this looks very strange ..... This question is quite stupid but very important for me in order to know if that controller permit to exchange data with one of our extention board at 1.2 MHz. Anybody knows ? Thanks very much for any help . -------------- next part -------------- A non-text attachment was scrubbed... Name: hubert.loewenguth.vcf Type: text/x-vcard Size: 285 bytes Desc: not available Url : http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060704/58c9551f/attachment.vcf