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20 BPF? where to find doc's that talk about that?

Started by dsp_man_c54 April 4, 2003
HI Doni and All,

Where did you find the infomation about the 8 bit serial (non spi)
stating a 20 BPF rate? I have read all the doc's on C54x,
bootloader, and any other referance I could find. the only thing I
have seen about that is the bootloader doc states a min 40 cpu
cycles between frames? I dont question if 20 bits per frame will
work, just that it is a fixed number compared to 40 cpu cycles which
could happen in two BCLKR's or some much less than 20BPF. I hope to figure out what I have not understood. When I do I will
let the group know of my findings. Maybe someone else will be able
to make use some day of those findings.

Caleb Austin



You're right, my calculation was based on:

BLCKR = 1/2 CPUCLK
BFSR = 1/40 CPUCLK
-------------------
1 FRAME = 20 BPF

Indeed, if BCLKR is very slow you don't need to have a minimum frame
of 20 BPF.

--- In , "dsp_man_c54" <austca@b...> wrote:
> HI Doni and All,
>
> Where did you find the infomation about the 8 bit serial (non spi)
> stating a 20 BPF rate? I have read all the doc's on C54x,
> bootloader, and any other referance I could find. the only thing I
> have seen about that is the bootloader doc states a min 40 cpu
> cycles between frames? I dont question if 20 bits per frame will
> work, just that it is a fixed number compared to 40 cpu cycles
which
> could happen in two BCLKR's or some much less than 20BPF. > I hope to figure out what I have not understood. When I do I will
> let the group know of my findings. Maybe someone else will be able
> to make use some day of those findings.
>
> Caleb Austin