Hello all,

I'd like to know what the maximum achievable data rate in the MSP430's
UART
is. By reading the MSP430x1xx Family User's Guide, I found out that it is
one third of BRCLK, but is this data real? I mean, has anyone tested
communication at such speed or near that? With an 8 MHz crystal, it would be
possible to communicate via UART at about 2,6 Mbps! I believe that such high
data rate would just be possible if the peripheral were located in the same
board of the MSP, or very close to it, isn't it?

Regards,
Adriano.

In theory you can have such high baud rates. In practice these high 
speeds don't leave much time for processing. Although a single byte 
might be trasnmitted or received at this data rate the mean data rate 
would be much slower than this since every time you need to read or 
write a buffer you have things like interrupt latency, data moves, 
protocol handling etc to deal with.

Al

Adriano wrote:

> Hello all,
> 
> I'd like to know what the maximum achievable data rate in the
MSP430's UART
> is. By reading the MSP430x1xx Family User's Guide, I found out that it
is
> one third of BRCLK, but is this data real? I mean, has anyone tested
> communication at such speed or near that? With an 8 MHz crystal, it would
be
> possible to communicate via UART at about 2,6 Mbps! I believe that such
high
> data rate would just be possible if the peripheral were located in the same
> board of the MSP, or very close to it, isn't it?
> 
> Regards,
> Adriano.
> 
> 
> 
> 
> .
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 

Thanks Al, by thinking better I realized that communicating beyond 230 kbps
wouldn't leave MSP process other important things.

Regards,
Adriano.


----- Original Message -----
From: onestone <onestone@ones...>
To: <msp430@msp4...>
Sent: Monday, August 23, 2004 8:33 PM
Subject: Re: [msp430] UART Baud rate


>
> In theory you can have such high baud rates. In practice these high
> speeds don't leave much time for processing. Although a single byte
> might be trasnmitted or received at this data rate the mean data rate
> would be much slower than this since every time you need to read or
> write a buffer you have things like interrupt latency, data moves,
> protocol handling etc to deal with.
>
> Al
>
> Adriano wrote:
>
> > Hello all,
> >
> > I'd like to know what the maximum achievable data rate in the
MSP430's
UART
> > is. By reading the MSP430x1xx Family
User's Guide, I found out that it
is
> > one third of BRCLK, but is this data real? I
mean, has anyone tested
> > communication at such speed or near that? With an 8 MHz crystal, it
would be
> > possible to communicate via UART at about 2,6
Mbps! I believe that such
high
> > data rate would just be possible if the
peripheral were located in the
same
> > board of the MSP, or very close to it,
isn't it?
> >
> > Regards,
> > Adriano.
> >
> >
> >
> >
> > .
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>
>
>
>
> .
>
>
> Yahoo! Groups Links
>
>
>
>
>
>