>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 05 July 2005 16:00
>To: Microcontroller discussion list - Public.
>Subject: Re: [PIC] 1-pin 16 key analog keypad
>
>
>Ummmm....  Why do you need a clock pin - can't you just get 
>the same speed oscillators and send a signal down the signal 
>line to say "start now"?

Vasile was suggesting the use of a shift register.  You need to clock out the bits using an SPI-like bus.

>
>And, how would the clock pin be shared with something else? 
>(unless it is input on one, output on another)

If the shift register has a chip select or enable pin, then it will ignore the clock while it is disabled, which may allow you to use the clock pin for other functions during this time.

Regards

Mike

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