134a6e5b5f
- Added stm32f4 hal and ll drivers pdf - Removed all the lfs objects to the old wiki - Removed lfs gitattribute garbage Signed-off-by: Henry Pauli <henry@mixict.nl> Co-authored-by: Henry Paulissen <henry@mixict.nl>
21 lines
1.0 KiB
Markdown
21 lines
1.0 KiB
Markdown
[Device schematic (pdf)](https://github.com/Flipper-Zero/flipperzero-firmware-community/raw/master/wiki_static/F1B1C0.0.pdf)
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## Errata
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* NAND reset IC drive reset net by push-pull output may cause MCU fault and disable internal MCU reset feature.
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* System going to boot-loop state when reset by reset circuit
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* No series resistors on external gpio for protecting MCU
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* Wrong value LED series resistor
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* Wrong footprint for CMOS transistors
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* Wrong value IR TX series resistor
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* No need capacitor on IR RX
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* Wrong value IR RX pullup resistor
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* 125 kHz RFID + iButton wrong schematic
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* It seems bad to place main VCC on external GPIO pins. Overcurrent can damage main regulator and cause device broken. User can apply wrong voltage on this pin.
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### New RFID + iButton schematic
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after many experiments we found good schematic solution for work with RFID and auxiliary follow iButton level (for non-TTL protocol like Cyphral)
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