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TYT/Tytera MD398 Reverse Engineering
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Added official brochure... 		8 years ago
datasheets Added official brochure... 8 years ago
teardown Renames... 8 years ago
README.md Added info about programming 8 years ago

README.md

MD398 Reverse Engineering

Resources for the Tytera (TYT) MD398 (aka Radioddity GD-55).

General Information

The programming cable is actually a common USB to TTL serial interface (not an actual USBN device). It's still not impossible the radio could appear as a DFU usb device for uprgades however.

Boot Modes

Different boot modes seem to be available:

PTT TOP SIDE BUTTON BOTTOM SIDE BUTTON EMERGENCY BUTTON Function
X X Flip + Mirror screen
X X ??? Black screen no chime, upgrade mode?
X X GPS Test mode