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)
|
|
|
|
## Errata
|
|
|
|
* NAND reset IC drive reset net by push-pull output may cause MCU fault and disable internal MCU reset feature.
|
|
* System going to boot-loop state when reset by reset circuit
|
|
* No series resistors on external gpio for protecting MCU
|
|
* Wrong value LED series resistor
|
|
* Wrong footprint for CMOS transistors
|
|
* Wrong value IR TX series resistor
|
|
* No need capacitor on IR RX
|
|
* Wrong value IR RX pullup resistor
|
|
* 125 kHz RFID + iButton wrong schematic
|
|
* 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.
|
|
|
|
### New RFID + iButton schematic
|
|
|
|
after many experiments we found good schematic solution for work with RFID and auxiliary follow iButton level (for non-TTL protocol like Cyphral)
|
|
|
|
|