On Wed, 30 May 2001, Spehro Pefhany wrote:

> At 08:40 PM 5/30/01 +0200, you wrote:
> >The 16f628 seems to be THE 16x84 killer: cheaper, more memory, a UART, etc.
> >It is even possible to free the OSC and MCLR pins and use these as I/O. But
> >that raises a question: when MCLR is configured as I/O, and the program does
> >something with this pin (for instance pull it low), how can I get the chip
> >in (high-voltage) programming mode? The ICSP guide does not address this
> >question. I do not know another PIC that is both flash and has an MCLR pin
> >that can be configured as I/O, so this issue might be specific to this chip.
>
> Simple, RA5/~MCLR/THV can only be used as a ST input, see the data sheet for
> details.

That's what it says...  and then they proceed to show a block diagram of
the RA5/MCLR/THV pin that clearly shows it as a bidirectional I/O pin.
Oops!

Dale
--
A train stops at a train station.  A bus stops at a bus station.
On my desk I have a workstation...

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