Lpc2000

----- Original Message ----- 
From: "leon_heller" <leon_heller@...>
To: <lpc2100@yahoogroups.com>
Sent: Wednesday, November 26, 2003 3:47 PM
Subject: [lpc2100] Re: LPC Baud Rate Question???


> --- In lpc2100@yahoogroups.com, David Bermingham <crwpulsar@y...> wrote:
> > Hi,
> > Im looking for Help on the UART initialisation for the LPC, I need a
> BAUD rate of 57600 bps but cant figure out the correct values to write
> to the DLM/DLL registers...
> >
> > A CCLK value of 60Mhz will give a default VPB(pclk) speed of
> 15MHz...Yes??
> > The value in the DLM/DLL registers has to be 16 time the desired
> baud rate, which gives 57600x16 = 921600. But this number is a 20 Bit
> Integer....
> >             .....11100001 00000000 0000.
> >
> > Please can somebody explain where my calculations are going
> wrong..or do I have to slow the processor down to get the required
> Baud rate???
>
>
> Aren't the Baud Rate Generators driven by the VPB clock (pclk), not clck.

Sorry, you said that.

15000000/(16*9600) = 97.66 for 9600 baud.

Don't you just have to divide by 98 using the U0DLL and U0DLM divisor
registers?

Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
http://www.geocities.com/leon_heller