Re: TouCAN too slow by 2X?

Hi Allan

Thanks very much, that was it.  Clearing the HSPEED bit of the UMCR 
(0xb07f80) put my TouCAN bitrate up to what I expected.

--- In [email protected], "Dobbin Allan-r11834" 
<Allan.Dobbin@...> wrote:
>
> The default value for UMCR[HSPEED] is 1 which halves the clock 
frequency
> of the IMB clock which feeds the Toucan.  Try clearing this bit.
>  
> FYI - the easiest way to check system clock is to look at CLKOUT, 
but
> that is not the IMB clock.
>  
> - Allan
>  
> 
> 	-----Original Message-----
> 	From: [email protected] [mailto:[email protected]] 
On
> Behalf Of Rick Corey
> 	Sent: Wednesday, July 05, 2006 8:08 PM
> 	To: [email protected]
> 	Subject: [MPC500] TouCAN too slow by 2X?
> 	
> 	
> 
> 	Hi
> 	
> 	I thought I had set up TouCAN on an MPC565 for 500 KBPS (2 us
> per 
> 	bit), but I see 4 us per bit with a scope. 
> 	
> 	Did anyone else find a factor-of-two bitrate surprise going 
from
> the 
> 	MPC565 User Manual to reality?
> 	
> 	Or would some kind person point out where I'm confused?
> 

<-- snip -->





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