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Updated M27C322 (markdown)

sanni 2023-04-21 17:48:31 +02:00
parent a595c82852
commit a2a5a71498
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M27C322.md → 27C322-Adapter.md

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Important: This does currently not work!
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## 27C322 Eprom adapter PCB:
![image](https://dl.dropboxusercontent.com/s/0siq2s9yxaxk87y/68747470733a2f2f646c2e64726f70626f7875736572636f6e74656e742e636f6d2f732f333575797661306438707868626b6f2f3237433332322e6a70673f646c3d31.jpg?dl=1)
Parts:
- PCB([27c322_adapter.zip](https://github.com/sanni/cartreader/tree/bd3eaa106b6e4cbdffbfa89a3fb5fedf3e028b17/pcb/adapters), 1.2mm thickness)
- 2x 12V Step-up converter: https://www.ebay.com/itm/201919379310
- 1x 10K resistor (through-hole)
- 1x 1K resistor (through-hole)
- 1x 10K resistor (SMD 0805)
- 1x NPN 2N2222 transistor (through-hole)
- 48 Pin ZIF Socket
Salvage the parts from the two step-up converters and build the PCB like this:
![image](https://dl.dropboxusercontent.com/s/kogu0h431p3hshx/68747470733a2f2f646c2e64726f70626f7875736572636f6e74656e742e636f6d2f732f65356d3967756a7768726f676266632f3237433332325f616461707465722e6a70673f646c3d31.jpg?dl=1)
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Important: The EPROM flashing code is incomplete. Setting/resetting margin mode is missing. Margin mode is needed for long time data retention. Therefore it should be considered non-working in its current form. Important: The EPROM flashing code is incomplete. Setting/resetting margin mode is missing. Margin mode is needed for long time data retention. Therefore it should be considered non-working in its current form.
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