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Message

Re: UART, SPI and SSP max speed ???

2006-04-05 by lpc2100_fan

--- In lpc2000@yahoogroups.com, "jayasooriah" <jayasooriah@...> wrote:
>
> --- In lpc2000@yahoogroups.com, "theothervmax" <vmax@> wrote:
> > AFAIK:
> > Max UART speed is PCLK/16
> 
> On LPC2292, with 14.7456 MHz xtal, PLL disabled, VPBDIV set to 1 and
> UART0 baud rate divisor set to 4, it runs okay at 230400 baud.
> 
> Jaya
>

Hi,
If you use a 2292 @ 14.7456 MHz you should buy the LPC2214 instead. It
is cheaper but does not have CAN. If you use CAN, you can not use
14.7456 MHz. 
==================
The statements about max speeds apply for a VPBDIV of 1, be aware that
the default after reset is VPBDIV=4, so max speed is:

UART = CPU/16/VPBDIV
SPI = CPU/8/VPBDIV
SSP = CPU/2/VPBDIV

Bob

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