I received a response via the online SR tool on this issue which is below. I then replied with further questions. I thought I would post here incase others are looking.
MY FURHTER QUESTIONS:
-------------------------------------------
Hi Alexander,
What does it mean, "gaps should be inserted between multiple characters to keep from exceeding the maximum sustained data rate."
Are you saying, the maximum sustained data rate is 5Mbps (at csb=266). So this means I don't need to insert gaps if I run my SCLK at 5Mhz?
If I run my SCLK at 22Mhz, does this mean I need to insert "Time" gaps between every pair of bytes since the SPI peripheral has a 2 byte buffer?
Please elaborate.
Thanks,
George
FREESCALE RESPONSE TO INITIAL QUESTIONS:
------------------------------------------------------------------------
Dear George,
In reply to your Service Request SR 1-702443694:
MPC8349 Reference Manual says:
The maximum sustained data rate that the SPI supports is system (csb) clock/50. However, the SPI can transfer a single character at much higher rates—system clock/4 in master mode and system clock/2 in slave mode. Gaps should be inserted between multiple characters to keep from exceeding the maximum sustained data rate.
For 266 Mhz csb it will be 266/50 = ~ 5 Mbps.
Thank you for your interest in Freescale Semiconductor products and for the opportunity to serve you.
Should you need to contact us with regard to this message, please see the notes below.
Best Regards,
Alexander
Technical Support
Freescale Semiconductor
