Icom Ci V Usb Interface Schematic Top Jun 2026

I couldn’t find a specific top-level schematic titled exactly “ICOM CI-V USB Interface Schematic Top” in public databases. However, the is ICOM’s proprietary control bus for radios (e.g., IC-703, IC-706, IC-718, IC-7300, etc.). A typical USB-to-CI-V interface uses a USB-to-serial bridge chip (FT232RL, CP2102, CH340) combined with a level converter (since CI-V is TTL-level, not RS-232).

pins of the UART chip must be tied together to interface with the single-wire CI-V bus. icom ci v usb interface schematic top

+---------------+ | USB Port | +---------------+ | | v +---------------+ | FTDI Chip | | (FT232RL) | +---------------+ | | v +---------------+ | Voltage | | Regulator | +---------------+ | | v +---------------+ | Interface | | Circuit | +---------------+ | | v +---------------+ | Radio | | Interface | +---------------+ I couldn’t find a specific top-level schematic titled

: Because computers traditionally use RS-232 serial ports (with separate transmit/receive lines) and modern computers use USB, the "top" schematic for a CI-V interface is essentially a level converter . pins of the UART chip must be tied