Hi David,

If the PIC is 16c55, then it is not 18 pin, it is 28 pin DIP 600 mil
package. Send me the data format and I will try to figure it out. give
me more details on the usage of the product.

Bye

Pailoor




David Duffy wrote:

> Hi everyone,
> A customer has given me a small radio paging console to possibly
> modify.
> It contains a simple 27MHz transmitter and keypad/display driven by a
> 16C55.
> These units are normally used for small businesses and have a very
> short
> range.
> The pocket pager has an 18 pin PIC, a piezo and a single digit LED
> display.
> I need to make the console a bit more user friendly and add a couple
> of new
> functions. Has anyone seen these units around or played with them ?
> The PIC
> in the console just keys the 27MHz for data transmission.  If someone
> knew the
> format used I could do some easy mods. The data rate is quite slow but
> does
> not
> look like anything obvious to me.  I have captured the data waveforms
> for
> various
> key combinations but can't figure out the format.  The origin looks
> Asian
> and I am
> led to believe that they are low in cost.  Can anyone offer any advice
> on
> this ?
> Regards...
> ____________________________________
> David Duffy,   Audio Visual Devices Pty Ltd
> Ph: +61 7 38210362   Fax +61 7 38210281
> AVD@uq.net.au  Unit 8, 9-11 Trade Street
> Cleveland, Qld, 4163, Australia.
> ____________________________________



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