Lpc2000

I have a LPC2129 running for 1 year @ 61.44Mhz
and it have been ok running for some days @ 72Mhz.
Looks like the core is able to support higher speeds, but the flash 
controller registers must be changed to slow down the flash access).
If you could share your findinds about the ENC + LPC, I will be very glad.

Mauricio



Ryan Niemi wrote:
> Hello,
>
> I'm working on a project that'll require ethernet.  I was hoping the
> LPC's w/ onboard MAC/PHY would come out before this project had to
> start, but alas, no such luck!  I've done the CS8900A, RTL8019A and
> Asix 10/100 routes before on past projects, but this application needs
> to be minimal space and lowest netlist connection count as possible to
> route in a minimally sized PCB.  Ethernet performance requirements
> isn't high, it'll just be some signalling and status packets to a
> control app over UDP.
>
> Has anyone interfaced a Microchip ENC28J60 MAC/PHY to an LPC via SPI?
> While looking at it, I ran across a potential problem.  The LPC2292
> datasheet section on the SPI interfaces say the SPI clock has a
> maximum of 1/8 the input clock.  The ENC28J60 errata says reading or
> writing the MAC registers may be unreliable if the SPI clock is below
> 8MHz.  At 60MHz, it would appear the max LPC SPI clock is 7.5MHz.  I'm
> contemplating overclocking the LPC slightly by using a 16MHz clock
> scaled to 64MHz, which would allow an 8MHz SPI clock.  But before I
> spend a bunch of time and money (it's a semi-personal project just for
> fun) to try it, I figured I'd check if anyone has blazed this trail
> before..
>
> Alternatives were Cirrus EP9301/2, but the package is large and I
> still need an external PHY anyway.  Atmel AT91RM9200 borders on cost
> sensitivity and also requires external PHY.  Not to mention external
> flash and RAM.  So I'm stuck with two chips minimum anyway, so might
> as well try to go with the LPC2292 as the most suitable CPU choice and
> select an ethernet solution around it.
>
> -Ryan
>
>
>
>
> ------------------------------------------------------------------------
> YAHOO! GROUPS LINKS
>
>     *  Visit your group "lpc2000
>       <http://groups.yahoo.com/group/lpc2000>" on the web.
>        
>     *  To unsubscribe from this group, send an email to:
>        lpc2000-unsubscribe@yahoogroups.com
>       <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe>
>        
>     *  Your use of Yahoo! Groups is subject to the Yahoo! Terms of
>       Service <http://docs.yahoo.com/info/terms/>.
>
>
> ------------------------------------------------------------------------
>



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