> -----Original Message-----
> From: Robert Lunn [SMTP:rlunn@tig.com.au]
> Sent: Friday, February 13, 1998 11:00 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: Simple(!) LCD Driver
>
> Louis Pretorius wrote:
>
> > I am looking for a VERY simple way to drive a 4 or
> > 5 character 7-segment LCD from a PIC, using as few
> > lines as possible.
>
>         Louis,
>
>         The MM5452 and MM5453 from National Semiconductor
>         (and Motorola) will drive 32 and 33 segments
>         respectively and 1 backplane.  They have a simple
>         2-wire interface (clocked serial data).
>
>         The PCF8577C from Philips will drive 32 segments
>         and 2 backplanes.  It also has a 2-wire interface
>         (but IIC, so other devices such as A/D converters
>         can be added to the same 2-wire bus).
>
>         The uPD7225G from NEC will drive 32 segments and
>         4 backplanes.  It has a 4-wire interface.
>
>         Datasheets for all these chips are available from
>         the respective manufacturers web sites.
>
> ___Bob
        [Louis Pretorius]

        Thank you Bob, this is exactly what I was looking for!

        Is there anyone that has come across any source code for driving
either of these chips?

        Louis