Dongle decode

[See_Mos]

To start with I need to use something that I have in the drawer--18F25K22, 18F25K50, 18f14K50, 16F1718 and the FRAM MB25RS64.

The PIC will not have to do anything else so I don't need any of the internal peripherals.

Because of the irregular timing bit-banging is probably the only way.

This picture shows the strange bits where the data from the PC changes twice but the clock does not.

[JonW]

can you post the latest capture? 

[See_Mos]

I'll give it a go

Opened OK

[JonW]

That worked this time

[See_Mos]

To save messing about interfacing different voltage levels I just ordered some FM25640 which are five volt compatible, the MB85RS64 is only 3V7 max.