Icom Ci V Usb: Interface Schematic Top |best|

Understanding the Icom CI-V USB Interface: Schematic & Design Guide

. Icom's CI-V bus uses a single-wire, bi-directional TTL (0–5V) signal where both transmit (TX) and receive (RX) data are combined onto one line. USB Controller FTDI FT232RL icom ci v usb interface schematic top

4. Detailed Schematic (Top View / PCB Layout Considerations)

a USB to CI-V interface you can use. to control a radio with CI-V remote control. port capability and common radio frequency. USB- ICOM CI-V - K7MEM Understanding the Icom CI-V USB Interface: Schematic &

Power

: Most USB CI-V interfaces are powered directly from the computer's 5V USB bus, eliminating the need for an external power supply. Pin 1: PTT (not used in CI-V) Pin

Pin 1: PTT (not used in CI-V)
Pin 2: Tx (CI-V): From FTDI RXD
Pin 3: Rx (CI-V): To FTDI TXD (Note: For simple cable designs, often ignore or terminate)
Pin 4: GND: Common ground
Pin 5: SQL (not used in CI-V)
Pin 6: RTS (CI-V): To FTDI CTS
Pin 7: CTS (CI-V): To FTDI RTS
Pin 8: Data (not used)
Pin 9: NC (not connected)

TXD from IC1 goes through a current-limiting resistor (330Ω) to the anode of IC2’s LED.
Cathode to ground.

The Schematic Stages:

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