WCH CH9102F Friend - USB to Serial Converter
USB-to-serial converter breakout using the CH9102F chip, a near pin-compatible alternative to the CP2102N for UART-to-USB bridging.
Pinout
- GND1
Ground pin on the FTDI-like 6-pin edge header, visible on the Adafruit product image silkscreen.
Type · GroundVoltage · 0V - CTS2
Clear-to-send flow-control pin on the FTDI-like edge header; Adafruit notes CTS is the only flow-control pin not supported by the built-in Linux kernel driver.
Type · UARTVoltage · 3.3V signal level, 5V compliant per Adafruit product page - 5V3
Power wire on the FTDI-like edge header; Adafruit states the power wire is +5V.
Type · PowerVoltage · +5V - TXO4
Serial transmit output on the FTDI-like edge header, visible on the Adafruit product image silkscreen.
Type · SignalVoltage · 3.3V signal level, 5V compliant per Adafruit product page - RXI5
Serial receive input on the FTDI-like edge header, visible on the Adafruit product image silkscreen.
Type · SignalVoltage · 3.3V signal level, 5V compliant per Adafruit product page - RTS6
Request-to-send / auto-reset control pin; Adafruit states the 6th pin is RTS and the board matches its FTDI cables by default.
Type · UARTVoltage · 3.3V signal level, 5V compliant per Adafruit product page - DTR
Modem-control pin available on the side header; Adafruit states the side header includes modem control pins such as DTR, RI and DSR.
Type · ControlVoltage · 3.3V signal level, 5V compliant per Adafruit product page - RI
Ring-indicator modem-control pin available on the side header per Adafruit product-page modem-control-pin description.
Type · ControlVoltage · 3.3V signal level, 5V compliant per Adafruit product page - DSR
Data-set-ready modem-control pin available on the side header per Adafruit product-page modem-control-pin description.
Type · ControlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | 1 | Ground | Ground pin on the FTDI-like 6-pin edge header, visible on the Adafruit product image silkscreen. | 0V |
| CTS | 2 | UART | Clear-to-send flow-control pin on the FTDI-like edge header; Adafruit notes CTS is the only flow-control pin not supported by the built-in Linux kernel driver. | 3.3V signal level, 5V compliant per Adafruit product page |
| 5V | 3 | Power | Power wire on the FTDI-like edge header; Adafruit states the power wire is +5V. | +5V |
| TXO | 4 | Signal | Serial transmit output on the FTDI-like edge header, visible on the Adafruit product image silkscreen. | 3.3V signal level, 5V compliant per Adafruit product page |
| RXI | 5 | Signal | Serial receive input on the FTDI-like edge header, visible on the Adafruit product image silkscreen. | 3.3V signal level, 5V compliant per Adafruit product page |
| RTS | 6 | UART | Request-to-send / auto-reset control pin; Adafruit states the 6th pin is RTS and the board matches its FTDI cables by default. | 3.3V signal level, 5V compliant per Adafruit product page |
| DTR | Control | Modem-control pin available on the side header; Adafruit states the side header includes modem control pins such as DTR, RI and DSR. | 3.3V signal level, 5V compliant per Adafruit product page | |
| RI | Control | Ring-indicator modem-control pin available on the side header per Adafruit product-page modem-control-pin description. | 3.3V signal level, 5V compliant per Adafruit product page | |
| DSR | Control | Data-set-ready modem-control pin available on the side header per Adafruit product-page modem-control-pin description. | 3.3V signal level, 5V compliant per Adafruit product page |
Pin details
9 connections- GND1
Ground pin on the FTDI-like 6-pin edge header, visible on the Adafruit product image silkscreen.
GroundVoltage · 0V - CTS2
Clear-to-send flow-control pin on the FTDI-like edge header; Adafruit notes CTS is the only flow-control pin not supported by the built-in Linux kernel driver.
UARTVoltage · 3.3V signal level, 5V compliant per Adafruit product page - 5V3
Power wire on the FTDI-like edge header; Adafruit states the power wire is +5V.
PowerVoltage · +5V - TXO4
Serial transmit output on the FTDI-like edge header, visible on the Adafruit product image silkscreen.
SignalVoltage · 3.3V signal level, 5V compliant per Adafruit product page - RXI5
Serial receive input on the FTDI-like edge header, visible on the Adafruit product image silkscreen.
SignalVoltage · 3.3V signal level, 5V compliant per Adafruit product page - RTS6
Request-to-send / auto-reset control pin; Adafruit states the 6th pin is RTS and the board matches its FTDI cables by default.
UARTVoltage · 3.3V signal level, 5V compliant per Adafruit product page - DTR
Modem-control pin available on the side header; Adafruit states the side header includes modem control pins such as DTR, RI and DSR.
ControlVoltage · 3.3V signal level, 5V compliant per Adafruit product page - RI
Ring-indicator modem-control pin available on the side header per Adafruit product-page modem-control-pin description.
ControlVoltage · 3.3V signal level, 5V compliant per Adafruit product page - DSR
Data-set-ready modem-control pin available on the side header per Adafruit product-page modem-control-pin description.
ControlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
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