PoLabs PoUSB12C USB to UART Adapter User Manual

: June 1, 2024
: PoLabs

Po Labs PoUSB12C USB to UART Adapter User Manual

Po Labs PoUSB12C USB to UART Adapter

Important Information

All information included in this document is current as of the date this document is issued. Such information, however, is subject to change without any prior notice.
Po Labs does not assume any liability for infringement of patents, copyrights, or other intellectual property rights of third parties by or arising from the use of Po Labs products or technical information described in this document. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of Po Labs or others. Po Labs claims the copyright of, and retains the rights to, all material (software, documents, etc.) contained in this release. You may copy and distribute the entire release in its original state, but must not copy individual items within the release other than for backup purposes.
Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of the products and application examples. You are fully responsible for the incorporation of these circuits, software, and information in the design of your equipment. Po Labs assumes no responsibility for any losses incurred by you or third parties arising from the use of these circuits, software, or information.
Po Labs has used reasonable care in preparing the information included in this document, but Po Labs does not warrant that such information is error free. Po Labs assumes no liability whatsoever for any damages incurred by you resulting from errors in or omissions from the information included herein.
Po Labs devices may be used in equipment that does not impose a threat to human life in case of the malfunctioning, such as: computer interfaces, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment, and industrial robots.
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Po Labs devices shall not be used for or in connection with equipment that requires an extremely high level of reliability and safety, as for example: aircraft systems, aerospace equipment, nuclear reactor control systems, medical equipment or systems for life support (e.g. artificial life support devices or systems), and any other applications or purposes that pose a direct threat to human life.
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Usage: the software in this release is for use only with Po Labs products or with data collected using Po Labs products.
Fitness for purpose: no two applications are the same, so Po Labs cannot guarantee that its equipment or software is suitable for a given application. It is therefore the user’s responsibility to ensure that the product is suitable for the user’s application.
Viruses: this software was continuously monitored for viruses during production; however, the user is responsible for virus checking the software once it is installed.
Upgrades: we provide upgrades, free of charge, from our web site at www.poscope.com. We reserve the right to charge for updates or replacements sent out on physical media.
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Please contact a Po Labs support at support@poscope.com if you have any questions regarding the information contained in this document or Po Labs products, or if you have any other inquiries.
The licensee agrees to allow access to this software only to persons who have been informed of and agree to abide by these conditions.
Trademarks: Windows is a registered trademark of Microsoft Corporation. Po Keys, PoKeys55, PoKeys56U, PoKeys56E,PoScope, Po Labs and others are internationally registered trademarks.

Introduction

The PoUSB12C is a USB 2.0 to RS-232 (UART) bridge converter which is simple, cost effective, very small and easy to use. It uses a USB-C type connector to connect to your PC and is based on the CP2102 Bridge from Silicon Labs. It provides the user with multi baud rate serial data and access to USB control signals in a convenient 8 pin 2,54 mm (0.1”) pitch package. The PoUSB12C is ideal for prototype or production.

The converter automatically manages the requests from USB host and commands for controlling the UART functions which simplifies the development effort and firmware. PoUSB12C also supports the RS485 standard and has an additional pin for transmit/receive (driver/receive enable) selection. To modify the device and its functionality Simplicity Studio software can be downloaded and used.

Main Features:

USB 2.0 compliant full-speed device (12Mbps maximum speed).
Xon/Xoff handshaking supported (300bps to 3Mbps).
UART supports 5-8 bit data, 1-2 Stop bits, odd/even and no parity.
Integrated EEPROM for Vendor ID, product ID, serial and release number.
On-chip 3.3V regulator available with power on reset circuit.
USB powered.
TX and RX signal levels are between 0V and 3.3V but 5V logic compatible.
Temperature range: -40 to +85 °C.
Small size: 19mm x 11mm x 4mm.
Virtual COM port drivers for Windows, Linux and MACOS.
Simplicity Studio software for customization.

Connectors and pinout

Pin description

5V	Supply pin for 5V power from USB
3V3	Regulated 3.3V power supply from IC (100mA max)
GND	Ground
TX (TXD)	Digital Output. Asynchronous data output (UART Transmit)
RX (RXD)	Digital Input. Asynchronous data input (UART Receive)
RTS	Digital Output. Ready To Send control output (active low).
CTS	Digital Input. Clear To Send control input (active low).
RS485 (485)	Digital Output. RS485 control signal.

Usage examples

PoUSB12 makes USB to Serial interface very simple, so you can easily create USB to RS-232 converters, USB to RS-422/RS-485 converters, upgrade legacy RS232 devices, make PDA and cellphone USB interface cables, barcode readers, POS terminals, etc. In any application, make sure the TX and RX lines from the PoUSB12 are crossed over to the attached peripheral. That is, the TX from the PoUSB12 connects to the RX of the target and the RX from the PoUSB12 connects to the TX of the target device. Note: the TX and RX signal levels are between 0.0 Volts and 3.3 Volts and they are 5V logic compatible.

The RS485 pin is an optional control pin that can be connected to the DE and RE inputs of the transceiver. When configured for RS485 mode, the pin is asserted during UART data transmission. The RS485 pin is active-high by default and is also configurable for active low mode using Xpress Configurator.

Usage examples

Mechanical dimensions

Grant of license

The material contained in this release is licensed, not sold. Po Labs grants a license to the person who installs this software, subject to the conditions listed below.

Access

The licensee agrees to allow access to this software only to persons who have been informed of and agree to abide by these conditions.

Usage

The software in this release is for use only with Po Labs products or with data collected using Po Labs products.

Copyright

Po Labs claims the copyright of, and retains the rights to, all material (software, documents etc) contained in this release. You may copy and distribute the entire release in its original state, but must not copy individual items within the release other than for backup purposes.

Liability

Po Labs and its agents shall not be liable for any loss or damage, howsoever caused, related to the use of Po Labs equipment or software, unless excluded by statute.

Fitness for purpose

No two applications are the same, so Po Labs cannot guarantee that its equipment or software is suitable for a given application. It is therefore the user’s responsibility to ensure that the product is suitable for the user’s application.

Mission Critical applications

Because the software runs on a computer that may be running other software products, and may be subject to interference from these other products, this license specifically excludes usage in ‘mission critical’ applications, for example life support systems.

Errors

This manual was continuously monitored for errors during production; however, the user is responsible for error checking the manual once it is used.

Support

There could be errors in these manuals, but if you found some, please contact our technical support staff, who will try to fix the problem within a reasonable time.

Upgrades

We provide upgrades, free of charge, from our web site at www.PoLabs.com. We reserve the right to charge for updates or replacements sent out on physical media.

Trademarks

Windows is a registered trademark of Microsoft Corporation. Po Keys, PoKeys55, PoKeys56U, PoKeys56E, PoKeys57U, PoKeys57E, PoKeys57CNC, Po Scope, Po Labs, Po Ext Bus, Po Ext Bus Smart, PoRelay8, Plasma Sens and others are internationally registered trademarks.