The heart of the radio is the Silicon Labs Si4735 DSP chip . This chip handles the heavy lifting of signal decoding for FM, AM (MW/LW), Shortwave, and SSB.
To help you find or utilize the exact for your specific board revision, let me know: xhdata d-808 schematic
: Often hidden under a black epoxy "blob," making direct identification difficult, though it supports a serial SWD interface. Versions and PCB Differences The heart of the radio is the Silicon Labs Si4735 DSP chip