Even with a smaller device it's possible : you can sometimes repurpose crystal and reset pins to be I/O, do a software SPI, and set registers using write-only methods (MOSI but no MISO connection) to get down to 2 or 3 pins used.
On Wed, Jan 1, 2020 at 1:54 PM Graham / KE9H <[email protected]> wrote: > On Tue, Dec 31, 2019 at 9:38 PM Bob kb8tq <[email protected]> wrote: > > > Hi > > > > The gotcha with a 6 pin package is that it is unlikely to have a (4 pin) > > SPI interface. > > Pretty much every PLL chip in the universe is SPI. > > > > Bob > > > > > Bob: > > I think things are more powerful than you think. > > For example, check out a PIC16F18313, 8 pin SOIC-8. > 6 I-O pins, mappable through a pin-mux. > Includes ADC, DAC, 3 Timers, UART, I2C, SPI, 2 blocks of user configurable > logic, and an on board CPU master clock good to 1 % over temp and voltage. > > $0.75 in quantity 1 ! > > So, all of that for less than a 555 timer IC. > > You don't have enough pins to get at everything simultaneously, but no > problem configuring a PLL over a SPI. > > --- Graham > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
