Why not break up the duties between 3 12C509 (two counters each), add an
SPI/3wire interface to each, MChip provides code for such and use a
16F84 as the main brain...

I have done this for a nuclear counter, 16 channels using 8 12C509's and
a 16F84 as the brain with an RS485 half duplex connection to a PC...
Total cost of hardware was $35.00 (OZ)...

Barry King wrote:
>
> I need to count six fast (up to 30 kHz or so) pulse streams.  I have
> to be very low power, about 50 uA average, so I can't just crank the
> clock on a PIC and sample 6 port pins.   Before, to count one pulse
> stream, I used the TMR0 in external clocking mode, and read it
> periodically. Which worked great.
>
> Now what I need are 6 TMR0s on one PIC.  I've used Intel 82C54
> counters before, but they only come in byte wide bus interfaces, and
> they have some stupid initialization problems.  Anybody know of a
> counter or counter/timer chip that is very low power and uses some
> kind of serial interface?
>
> TIA,
>
> ------------
> Barry King
> Engineering Manager
> NRG Systems "Measuring the Wind's Energy"
> Hinesburg, Vermont, USA
> barry@nrgsystems.com
> "The witty saying has been deleted due to limited EPROM space"

Nino.
--
******************************************************
* Antonio (Nino) Benci                               *
* Electronic Services Manager                        *
* Monash University - Dept of Physics                *
* Wellington Rd, Clayton. 3168                       *
* Victoria, Australia.                               *
* TEL    - 61 3 9905 3649, FAX - 61 3 9905 3637      *
* Mobile - 0414 764 763 (private and ah only)        *
* EMAIL  - nino.benci@sci.monash.edu.au (work)       *
*        - fleatech@excite.com (private)             *
* WWW    - www.physics.monash.edu.au/                *
******************************************************