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UG205: CP2102N-EK Kit User's Guide

The CP2102N-EK kit is designed to showcase the various features

of the CP2102N USBXpress® devices.

These highly-integrated USB-to-UART bridge controllers provide a simple solution for

updating RS-232 designs to USB using a minimum of components and PCB space. By

eliminating the need for complex firmware and driver development, the CP2102N devi-

ces enable quick USB connectivity with minimal development effort.

The kit includes the following:

KEY FEATURES

• CP2102N USB-to-UART Bridge

• Headers for easy access to GPIO, UART,

or Battery Charger Detect pins

• RS-232 Transceiver and DB9 connector

• SUSPENDb LED, GPIO LEDs

• Remote Wakeup pushbutton for waking

host PC

• 3 Mbaud TXD/RXD RS-232 transceivers

• CP2102N USB-to-UART Bridge Evalua-

tion Board

• 1 x serial cable

• Getting Started card

• 1 x micro USB cable

silabs.com | Smart. Connected. Energy-friendly. Rev. 0.2

Downloaded from Arrow.com.

Summary of content (15 pages)

PAGE 1
UG205: CP2102N-EK Kit User's Guide The CP2102N-EK kit is designed to showcase the various features of the CP2102N USBXpress® devices. These highly-integrated USB-to-UART bridge controllers provide a simple solution for updating RS-232 designs to USB using a minimum of components and PCB space. By eliminating the need for complex firmware and driver development, the CP2102N devices enable quick USB connectivity with minimal development effort.
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UG205: CP2102N-EK Kit User's Guide Getting Started 1. Getting Started 1. Download and Install the Latest Virtual COM Port (VCP) Drivers. The Virtual COM Port (VCP) drivers enable the CP2102N to appear as a standard COM port. Download the latest version of drivers from the Silicon Labs website: http://www.silabs.com/vcpdrivers In most cases, select the default option without serial enumeration. 2. Set Up Your Kit. a.
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UG205: CP2102N-EK Kit User's Guide Getting Started 4. Set up a Loop-Back Test. Rotate the jumpers on the CP210x 7 RX and TX pins to tie RX and TX together and perform a loop back test. silabs.com | Smart. Connected. Energy-friendly. Downloaded from Arrow.com. Rev. 0.
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UG205: CP2102N-EK Kit User's Guide Getting Started 5. Send and Receive Some Data a. In Windows, open a serial terminal program (downloaded separately, RealTerm pictured) to verify the CP2102N UART functionality. b. Set the baud rate and select the COM port from Device Manager. c. Type in the transmit area. The characters should echo back after looping through the CP2102N TXD and RXD pins. 6.
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UG205: CP2102N-EK Kit User's Guide Relevant Documentation 2. Relevant Documentation The following Application Notes are applicable to CP2102N devices: • AN721: CP210x Device Customization Guide — This application note guides developers through the configuration process of USBXpress devices using Simplicity Studio [Xpress Configurator]. • AN220: USB Driver Customization — This document and accompanying software enable the customization of the CP210x Virtual COM Port (VCP) and USBXpress drivers.
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UG205: CP2102N-EK Kit User's Guide Device Customization 3. Device Customization Device customization for the CP2102N is done through Xpress Configurator, which is available in Simplicity Studio: http://www.silabs.com/simplicity The Simplicity Studio software package contains all the tools, drivers, configuration software, and documentation needed to use the CP2102N USB-to-UART Bridge Evaluation Board. After downloading the latest version of Simplicity Studio and installing the software: 1.
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UG205: CP2102N-EK Kit User's Guide Driver Options and Software Interface 4. Driver Options and Software Interface 4.1 Virtual COM Port (VCP) Driver CP2102N devices are pre-programmed with a VID of 0x10C4 and PID of 0xEA60. This VID and PID combination matches the Virtual COM Port (VCP) driver. With this driver, the CP2102N will appear as a COM port and can be accessed using any terminal program or custom-written software.
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UG205: CP2102N-EK Kit User's Guide Driver Options and Software Interface 4.2 USBXpress Driver An alternative driver is the USBXpress® direct-access driver, which is also available on the Silicon Labs website (www.silabs.com/interface-software). Rather than appearing as a COM port, software can use a simple, high-level Application Program Interface (API) to provide access to CP2102N for complete USB connectivity. No USB protocol or host device driver expertise is required.
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UG205: CP2102N-EK Kit User's Guide Hardware Overview 5. Hardware Overview The CP2102N Evaluation Kit includes an evaluation board with a CP2102N device pre-installed for evaluation and preliminary software development. Numerous input/output (I/O) connections are provided to facilitate prototyping using the evaluation board. Refer to the figure below for the locations of the various I/O connectors. Note: There is a restriction on the maximum VBUS voltage.
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UG205: CP2102N-EK Kit User's Guide Hardware Overview JP3 - Ground and RSTb Header J1 - UART Signal Access Connector JP2 - Power Configuration Header CP2102N Device DB9 Connector USB Connector JP1 - Battery Charger and GPIO Header Remote Wakeup Push Button RS232 Transceivers Figure 5.1. CP2102N Evaluation Board 5.1 USB Interface (J4) A Universal Serial Bus (USB) connector (J4) is provided to facilitate connections to the USB interface on the CP2102N. See the table below for the USB pin definitions.
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UG205: CP2102N-EK Kit User's Guide Hardware Overview 5.2 UART Interface (J1 and J5) A RS232 transceiver circuit and DB9 connector (J5) are provided on the evaluation board to connect the CP2102N to external serial devices. Table 5.3.
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UG205: CP2102N-EK Kit User's Guide Hardware Overview 5.3 Battery Charger Detect and GPIO (JP1) The JP1 header provides access to the CP2102N Battery Charger Detect and GPIO pins. See the table below for the JP1 pin descriptions. The row of LEDs next to the JP1 header serves as the indicators for each of the functions assigned to the GPIO pins. Removing a JP1 header shorting block disconnects the LED from the corresponding pin and CP2102N signal.
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UG205: CP2102N-EK Kit User's Guide Schematics and BOM 6. Schematics and BOM 6.1 Board Files The schematics and bill of materials (BOM) for the CP2102N USB-to-UART Bridge Evaluation Board are available through Simplicity Studio when the kit documentation package has been installed. To access these documents, click the [Kit Documentation] tile after selecting the device in the left pane. 6.2 Board Revision History • 2.1 — Initial production revision. Revision 2.
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UG205: CP2102N-EK Kit User's Guide Revision History 7. Revision History 7.1 Revision 0.2 June 17th, 2016 Updated instructions for Simplicity Studio v4. 7.2 Revision 0.1 April 19th, 2016 Initial revision. silabs.com | Smart. Connected. Energy-friendly. Downloaded from Arrow.com. Rev. 0.
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Simplicity Studio One-click access to MCU and wireless tools, documentation, software, source code libraries & more. Available for Windows, Mac and Linux! IoT Portfolio www.silabs.com/IoT SW/HW Quality Support and Community www.silabs.com/simplicity www.silabs.com/quality community.silabs.