RE: clock speed of mpc565

Hi,
I was wondering if there was techical documentation on this. I am using an
MPC566 and was assuming that I could just set fields MF = 13 and DIVF = 0 in
the PLPRCR register with a 4 Mhz oscillator clock. 

Fsys = 56 Mhz = ( 4 Mhz / (DIVF + 1) ) * ((MF + 1) / ((2^DNFH) or (2^DNFL
+1))

where DNFH = 0, DNFL = 0

I don't have a logic analyzer so it's hard for me to validate this. 





Dees Randy-rsaf30 wrote:
> 
> 1. if using a 4 MHz crystal, you must set the predivider to divide by 2
> (to get 2Mhz into the PLL), then set the multiplier to 28 to a 56 MHz
> system clock.
> 2. programmable to same as the system frequency or system frequency
> divide by 2.
> 3. it depends on the frequency you select. the bit rate is programmable.
>  
> randy. 
> 
> ________________________________
> 
> From: [email protected] [mailto:[email protected]] On Behalf
> Of huzaec
> Sent: Tuesday, April 10, 2007 1:13 AM
> To: [email protected]
> Subject: [MPC500] clock speed of mpc565
> 
> 
> 
> i have few more questions regarding clock speed of mpc565..
> 
> 1. How is it possible to maximize the clock speed to 56MHz through 
> programming??
> 2. What is the bus speed of in mpc565??
> 3. At what speed does the UARTs operate ?
> 
> 
> .
>  
> <http://geo.yahoo.com/serv?s=97359714/grpId=6276387/grpspId=1706554205/m
> sgId=3849/stime=1176185590/nc1=3848614/nc2=4507179/nc3=4025304> 
>  
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 

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