multi-voltage dual USB UART¶

This is a CP2105 based dual-port USB UART.

As a very special feature, this device allows you to manually select the UART voltage levels to 1.8, 2.3, 2.5, 2.8, 3.0 or 3.3 Volts.

It is thus ideal for a lab environment, where you frequently need to interconnect with various embedded electronics devices that have UARTs at unusual voltages.

Both UART ports feature RxD/TxD/RTS/CTS signals and have TVS diodes for ESD protection.

Miscellaneous CP2105 GPIOs are available on a separate header

Pictures¶

Design Files / Schematics / Layour¶

The EAGLE design files for this open hardware project are available in the osmocom-small-hardware.git repository and can be checked out using
git clone git://git.osmocom.org/osmo-small-hardware.git.

PDF renderings of schematics and component placement are attached below.

Availability¶

A fully assembled circuit board can be obtained from http://shop.sysmocom.de/products/multi-voltage-usb-dual-uart