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Re: [lpc2000] 100 MHz clock using LPC2138

2005-06-12 by Micron Engineering

sudip nag ha scritto:

>My requirement is basically to transmit data from one microcontroller (LPC2138) to the other at 100MHz. Thus the clock generated must synchronize the data. Si4112 has IF out relying upon its separate crystal. This may cause data transition mismatch with driving clock. So its preferable to generate clock from LPC2138. Please suggest any outcome.
> 
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LPC2138 may have a clock lower then 60MHz so it is not possible to 
generate directly from LPC2138 100MHz clock. Also if you need to 
transfer data from a LPC2138 to a different mcu you may not do it at 
100MHz. I think that also using assembler you may transmit to a fraction 
of 60MHz may be burst data at 10MHz if your mcu hasn't to do anything else.

>Sudip
>
>weverest3 <weverest@...> wrote:
>--- In lpc2000@yahoogroups.com, sudip nag <sudipnag1@y...> wrote:
>  
>
>>I would like to generate 60 MHz to 100 MHz clock, in controlled step 
>>    
>>
>of 1 MHz, with 50% duty cycle using LPC2138. Any suggestion how to 
>generate the same. Match functionality is inappropriate for generating 
>such high frequency.
>
>The Si4112 (derivative of Si4133) from www.silabs.com has an output 
>from 62 MHz to 1 GHz (and the part will work lower). They are 
>available from Digikey.
>
>-Wallie
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