[chbot] Help track down a processor - the double chox fish challenge
markaren1 at xtra.co.nz
Wed Jun 23 02:10:50 BST 2021
For those with way too much spare time on their hands.
I have a CPU based Chinese product which requires some firmware updates
(probably a complete rewrite).
Finding a pin-compatible part with a low cost tool-chain is also OK.
This is not a commercial exercise.
CPU has 20 pins, SOIC package
Pin 5 - I2C
Pin 6 - GND
Pin 7 - I2C
PIN 12 - ADC
PIN 13 - ADC
PIN 15 - 3V3
Pretty much all of the other pins are GPIO.
Almost like ATtiny87, except I2C required either side of the GND pin.
I started by using Digikey as the sifting and sorting agent, just
wondering if their is a better way.
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