"ratemonotonic" <niladri1979@gmail.com> skrev i meddelandet 
news:1189179123.588553.136470@22g2000hsm.googlegroups.com...
> Hi all,
>
> Has anyone used a Low power MCU with 3 hardware UARTs.
>
> Any help appreciated.
>
> Thanks
> Niladri Bose.
>

The ATmega1280 has an 8 bit AVR RISC core and provides 4 UARTs.

-- 
Best Regards,
Ulf Samuelsson
This is intended to be my personal opinion which may,
or may not be shared by my employer Atmel Nordic AB 

tguclu <tugrul.guclu@gmail.com> wrote in news:1189408543.913827.147040@
50g2000hsm.googlegroups.com:

> On Sep 7, 6:32 pm, ratemonotonic <niladri1...@gmail.com> wrote:
>> Hi all,
>>
>> Has anyone used a Low power MCU with 3 hardware UARTs.
>>
>> Any help appreciated.
>>
>> Thanks
>> Niladri Bose.
> 
> Hi
> I have a similar question , has anyone used a low power (3.3V) with 3
> XUSART modules.(I'm trying to implement SDLC/HDLC protocols)
> Thanks
> 

Check out the Freescale Embedded PPC chips 8XX(X) line.   Their SCC/UCC 
support async and SYNC protocols.

tguclu wrote:
> On Sep 7, 6:32 pm, ratemonotonic <niladri1...@gmail.com> wrote:
> 
>>Hi all,
>>
>>Has anyone used a Low power MCU with 3 hardware UARTs.
>>
>>Any help appreciated.
>>
>>Thanks
>>Niladri Bose.
> 
> 
> Hi
> I have a similar question , has anyone used a low power (3.3V) with 3
> XUSART modules.(I'm trying to implement SDLC/HDLC protocols)
> Thanks

So you want 3 SDLC/HDLC ports ?

Those are relatively rare in uC:

Infineon had a C165 variant with HDLC, and
the STR71x from ST has one HDLC channel.

Then in uP, we have Rabbit, 6 uart, of which 2 Chans can
do HDLC, and you could even look at the Zilog Comms controllers,
( or even Z80382, which DOES have 3 x HDLC, tho that's probably
a bigger call for a new design....)

Innovasic have some HDLC devices, they have the venerable 8044,
and perhaps more interesting is the FIDO series, which does
claim to have HDLC support in the UIC blocks, and there
are 4 of those.


-jg

ratemonotonic wrote:
> Hi all,
> 
> Has anyone used a Low power MCU with 3 hardware UARTs.
> 
> Any help appreciated.
> 
> Thanks
> Niladri Bose.
> 

The small ColdFires have 3 hardware UARTs ("low power" is a pretty vague 
term) if you need more processing power, otherwise the AVRs are a good 
choice.

On Sep 7, 6:32 pm, ratemonotonic <niladri1...@gmail.com> wrote:
> Hi all,
>
> Has anyone used a Low power MCU with 3 hardware UARTs.
>
> Any help appreciated.
>
> Thanks
> Niladri Bose.

Hi
I have a similar question , has anyone used a low power (3.3V) with 3
XUSART modules.(I'm trying to implement SDLC/HDLC protocols)
Thanks

On Sun, 09 Sep 2007 14:05:47 GMT, Mike Harrison <mike@whitewing.co.uk>
wrote:

>On Sat, 08 Sep 2007 21:34:15 +0200, Anton Erasmus <nobody@spam.prevent.net> wrote:
>
>>On Fri, 07 Sep 2007 15:32:03 -0000, ratemonotonic
>><niladri1979@gmail.com> wrote:
>>
>>>Hi all,
>>>
>>>Has anyone used a Low power MCU with 3 hardware UARTs.
>>>
>>>Any help appreciated.
>>>
>>
>>The STR7 and STR9 ARM MCUs from ST has three UARTs.
>>
>>Regards
>>  Anton Erasmus
>
>There might be something in the Cypress Psoc range that can be configured for 3 UARTS. 

Yes, this is correct.

I am using a PsoC  to get   6  ---  1/2 duplex  UARTS PLUS 1 full
duplex UART.

They can be configured for 4 (four)  full duplex UARTS, or you can
re-configure on the fly a receiver to be a transmitter and
vis-a-vers-a as I am doing.  This product is for a "hub" used with our
company's  existing products.

boB
K7IQ


>
>If one of the UARTs is transmit-only, you can sometimes use SPI ports to generate UART data, if the
>data length and clocking options are sufficiently flexible, e.g. the SSP on many of NXP's LPC2xxx
>ARM parts can do this. 

On Sat, 08 Sep 2007 21:34:15 +0200, Anton Erasmus <nobody@spam.prevent.net> wrote:

>On Fri, 07 Sep 2007 15:32:03 -0000, ratemonotonic
><niladri1979@gmail.com> wrote:
>
>>Hi all,
>>
>>Has anyone used a Low power MCU with 3 hardware UARTs.
>>
>>Any help appreciated.
>>
>
>The STR7 and STR9 ARM MCUs from ST has three UARTs.
>
>Regards
>  Anton Erasmus

There might be something in the Cypress Psoc range that can be configured for 3 UARTS. 

If one of the UARTs is transmit-only, you can sometimes use SPI ports to generate UART data, if the
data length and clocking options are sufficiently flexible, e.g. the SSP on many of NXP's LPC2xxx
ARM parts can do this. 

On 9 Sep, 09:24, Frank-Christian Kruegel <dontmai...@news.invalid>
wrote:
> On Fri, 07 Sep 2007 15:32:03 -0000, ratemonotonic <niladri1...@gmail.com>
> wrote:
>
> >Has anyone used a Low power MCU with 3 hardware UARTs.
>
> Atmel AVR ATmega640/1280/2560 - they have four.
>
> Mit freundlichen Gr=FC=DFen
>
> Frank-Christian Kr=FCgel

Thank very much for helpful suggestions , I will read all these
datasheets.

On Fri, 07 Sep 2007 15:32:03 -0000, ratemonotonic <niladri1979@gmail.com>
wrote:

>Has anyone used a Low power MCU with 3 hardware UARTs.

Atmel AVR ATmega640/1280/2560 - they have four.

Mit freundlichen Gr&#4294967295;&#4294967295;en

Frank-Christian Kr&#4294967295;gel

ratemonotonic wrote:

> On 8 Sep, 20:34, Anton Erasmus <nob...@spam.prevent.net> wrote:
> 
>>On Fri, 07 Sep 2007 15:32:03 -0000, ratemonotonic
>>
>><niladri1...@gmail.com> wrote:
>>
>>>Hi all,
>>
>>>Has anyone used a Low power MCU with 3 hardware UARTs.
>>
>>>Any help appreciated.
>>
>>The STR7 and STR9 ARM MCUs from ST has three UARTs.
>>
>>Regards
>>  Anton Erasmus
> 
> 
> Thanks , is there any 8 bit micros with 3 uarts?

Yes, the ASIX AX110xx series have 3 uarts, and a high speed core:

http://www.asix.com.tw/products.php?op=ProductList&PLine=72

Pops up 4th for a google for
80C51 core "three uart"

Or, you can use something like the tiny AT89LP21x from Atmel, as a
low cost, (very) Smart SPI uart, and add as many UARTs as you like.
NXP also have fixed function SPI-UART devices.


-jg