piclist 1997\08\20\234439a >
Thread: Pic interface to Internal modem.
www.piclist.com/techref/microchip/devices.htm?key=pic
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face BY : John Payson email (remove spam text)



> Has anyone worked on an interface to an internal modem using a pic?
>
> would it be possible to interface to the data bus(from the uart) and decode
> the address lines and use the irq for the interrupt?

I suppose it would be possible, but unless you add external latching,
you'll use up 15 I/O lines (8 data, 4 address, /IORD, /IOWT, and IRQ).  An
alternative might be to find a modem with a non-integrated UART chip.
Remove that, wire your PIC in its place, and you should be all set to go.
<199708210329.WAA14088@Kitten.mcs.com> 7BIT

In reply to: <19970821022643437.AAA286@tdooley>
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Subject (change) Pic interface to Internal modem.

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