![]() The firmware 3.0.6 version was saved after the radio did a factory reset, and has invalid data in its calibration data. I’ve attached 2 data dumps which I downloaded from my GD-77 Generation, CTCSS / DCS generation & detection. Handles all receive including front end, mixer, IF amp, IF filtering, demod, TX synthesis, TX buffer, DTMF & tone RF "radio on a chip" AT1846S with 26 MHz ref osc. ![]() Main microcontroller: MK22FN512VLL12 - ARM microcontrollerĨMbit (1Mbyte) FLASH: Winbond 25Q80BVNIG - serial FLASH 8Mbit (1Mbyte) with dual & quad SPIĮEPROM (serial): ATMLH646 (16CMY?) Possibly 16kbit (2kbyte)? I is however still a ARM Cortex M4 CPU like the F405Įxternal hardware details are also completely different from the MD-380 L It uses the NXP / Freescale MK22FN512VLL12, (aka NXP K22) which has similar performance to the STM32F4 but the MCU peripherals etc are completely different. Unfortunately the GD-77 (MD-760) does not use same processor as in the MD-380.
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