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I wonder if OP did things the hard way. I2C eeproms, including their 24C02 has a write-protect line.

They could probably enable write protection and the chip would never decrement.

Just cut WP off from gnd and attach to vcc (with a pull-up for good measure), or vice-versa and voila.

Depends if the machine’s MCU verifies writeability or if the decrement actually happened and cares.

Early paytv satellite systems didn’t care…

Wondering the same!

I didn’t read their other guide, but yea, they did that. You do have to keep track of your reservoir manually.

> The easiest way is to melt the solder on the WP pin, and gently lift it up off the pads so it is no longer making contact

(And then bridge it to vcc).

FYI for anyone that breaks the pin, you can usually scrape into the chip a bit and solder onto the rest of the leg past the point of fracture.