I=B4ve been using the 16F627/28=B4s UART with the internal oscilator in s=
everal
projects, up to 19200bauds, and
have NEVER had a problem. If problems would have appeard, I would prefer =
to
add a checksum or any kind of data
control to it, rather than put a cristal o resonator. Not only for the co=
st.
Just simplicity.

        Gabriel.-


-----Mensaje original-----
De: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]En nombre de Giorgio De Nunzio
Enviado el: Mi=E9rcoles, 03 de Julio de 2002 15:21
Para: PICLIST@MITVMA.MIT.EDU
Asunto: 16f628 and i2c; 16f628 with internal osc


Hi all!
I am building up some code on a 16f628 for i2c communication.
I have found a lot of stuff about software i2c (on 84 and so on), but
nothing exploiting the internal usart. Is there some code available? Asm,=
 if
possible.

I am curious about the use of the 628 with no xtal: what about serial
communication speed when no xtal is used? At what baud rate can the pic
still work? I am going to do some test this evening on the precision of t=
he
internal pwm with no xtal.

Thanks!
Ciao
Giorgio

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