Isaac Marino Bavaresco wrote:
> Em 3/2/2010 16:58, Jan-Erik Soderholm escreveu:
>   =

>> Dwayne Reid wrote:
>>   =

>>     =

>>> Good day to all.
>>>
>>> I'm about to look at a project where I need to communicate with 3 =

>>> serial devices.  All 3 ports will be communicating at 38,400 =

>>> baud.  Although all three ports need to be able to receive data =

>>> simultaneously, transmission can be to one device at a time.
>>>
>>> I see that some of the larger (16-bit) PICs have up to 4 UARTs on =

>>> board.  However, I haven't used those devices yet and don't have a C =

>>> compiler for them.
>>>
>>> I recall discussion in the past where people have used external UARTs =

>>> with 16F PICs, connected via SPI or I2C.  Can someone remind me of =

>>> what those UARTs were?
>>>
>>> The largest packet size appears to be less than 16 bytes.  It would =

>>> be cool if these external UARTs had at least a 16-byte receive buffer.
>>>
>>>     =

>>>       =

>> Here is one with 128 byte send and rec buffers :
>> http://www.maxim-ic.com/quick_view2.cfm/qv_pk/6463
>>   =

>>     =

>
> At $4.00/unit @ 1k, it is more expensive than most PIC24 with 4 UARTs.
> Adding the cost of the MCU, it becomes more expensive than a PIC32 with
> 6 UARTs.
>
>
> Regards,
>
> Isaac
> __________________________________________________
> Fa=E7a liga=E7=F5es para outros computadores com o novo Yahoo! Messenger =

> http://br.beta.messenger.yahoo.com/ =

>
>   =

Dwayne,

Why don't you connect 4 PIC16Fs in an I2C arrangement? Each one would be =

a UART port?
The PIC16F87 comes to mind...One as I2C master, 3 slaves...

--Bob
-- =

http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist