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add hw1.0 description and schematic

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aanper 2020-08-02 08:17:52 +03:00
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README.md
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* [Bluetooth](wiki/bluetooth.md)
* [NFC](wiki/nfc.md)
## Hardware
* [Version 1.0](wiki/hw-1.0.md)
* In progress Version 1.1

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wiki/flipper_zero_rev_1_0.pdf Normal file
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wiki/hw-1.0.md Normal file
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# Hardware version 1.0
[device schematic](wiki/flipper_zero_rev_1_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 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)