RE: MPC5554 speed up list

I don't have a list, but here are some of the main things:
 
1) system clock frequency - set pll to get your maximum possible speed.
This is typically 80 or 128MHz depending on the speed rating of your
part. Verify this by monitoring CLKOUT.
2) Run code (and stack, etc) from cache.  This is a two step process
that involves writing the L1CSR0 register to enable the cache, plus
making the memory page cachable by clearing the cache inhibit bit within
the MMU TLB for that page.
3) Set optimum flash wait states and prefetching by writing the flash
BIU control register (refer to latest errata information listing
required values).
 
Those are the main things, some smaller gains can be made by tweaking
the crossbar priorities, enabling branch target buffer prediction in the
BUCSR, using DMA where possible to replace interrupts, etc.
 
- Allan

________________________________

From: [email protected] [mailto:[email protected]] On Behalf
Of Farkas, Les
Sent: Friday, September 29, 2006 10:41 AM
To: [email protected]
Subject: [MPC500] MPC5554 speed up list



Does anyone have a list of items to check to make sure that the MPC5554
is running at the fastest possible rate?

-Les

This message contains PRIVILEGED AND PROPRIETARY INFORMATION 
intended solely for the use of the addressee(s) named above. Any
disclosure, distribution, copying or use of the information by 
others is strictly prohibited. If you have received this message 
in error, please advise the sender by immediate reply and delete 
the original message. Thank you.


 


[Non-text portions of this message have been removed]



-----------------------------------------------------------
To learn more about Freescale Microcontrollers, please visit
http://www.freescale.com/mcu


 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/MPC500/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/MPC500/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:[email protected] 
    mailto:[email protected]

<*> To unsubscribe from this group, send an email to:
    [email protected]

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/