nu 0x6E75
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| +------------+ | |
| Power 12v | STM 32 | RJ45 Mic | |
| Antenna | DSP engine | S/P (headphone) | |
| I/Q | (Base) | KEY (paddles or straight) | |
| | | ACC (linear amplifier interface) | |
| +-----+------+ USB DEV (CAT control and tx/rx audio) | |
| |I2C or ? | |
| ----------------|------------------------------------------ | |
| | | |
| +-----+------+ |