CP2102-EK CP2102 E VALUATION K IT U SER ’ S G UIDE 1. Kit Contents The CP2102 Evaluation Kit contains the following items: CP2102 Evaluation Board Serial Cable USB Cable DVD Quick Start Guide RS232 2. Relevant Documentation Application notes can be found on the Interface Application Notes page for all fixed-function devices: www.silabs.com/interface-appnotes. AN721: CP210x/CP211x Device Customization Guide — Customize the VID, PID, serial number, and other parameters stored in the CP2102 EPROM. AN197: Serial Communications Guide for CP210x — Programming guide for using the Virtual COM Port (VCP) drivers. AN169: USBXpress Programmer’s Guide — Programming guide for using the USBXpress drivers. AN220: C8051F32x and CP210x USB Driver Customization — VCP or USBXpress driver customization tool. AN571: CP210x Virtual COM Port Interface — USB interface details for CP210x devices. 3. Software Setup The Software Development Kit (SDK) for the CP2102 kit is included on the kit DVD. The latest version of this installer can also be downloaded from the www.silabs.com/interface-software website. This package includes: Device Customization Utility (AN721) Documentation — data sheet, application notes, user’s guide, quick start guide, etc. CP210x Virtual COM Port (VCP) Drivers Software — Driver Customization Utility (AN220) and programming examples The Windows installer should launch automatically after inserting the DVD. For Mac and Linux, browse to the appropriate directory on the DVD to install the software package. Follow the instructions to install the SDK and drivers to the system. 3.1. USBXpress Driver Development Kit The Silicon Laboratories USBXpress® Development Kit provides a complete host software solution for interfacing to CP210x devices. No USB protocol or host device driver expertise is required. Instead, a simple, high-level Application Program Interface (API) for the host software is used to provide complete USB connectivity. The USBXpress Development Kit includes Windows device drivers, Windows device driver installer, host interface function library (host API) provided in the form of a Windows Dynamic Link Library (DLL). See Application Note AN169, “USBXpress Programmer’s Guide” for detailed information on using the USBXpress drivers. The USBXpress drivers are available here: www.silabs.com/usbxpress. Click the USBXpress Development Kit link in the Download for Windows 2000/XP/Server 2003/Vista/Win7 section to download the USBXpress drivers. Run the installer and follow the steps to install the software to the desired location. The default installation directory is C:\SiLabs\MCU\USBXpress_SDK. Further installation instructions for the WinCE drivers can be found in the ReadMe.txt file contained inside the driver package. Rev. 0.5 7/13 Copyright © 2013 by Silicon Laboratories CP2102-EK CP2102-EK 4. CP2102 Hardware Interface The evaluation board is connected to a PC as shown in Figure 1. 1. 2. 3. 4. Connect one end of the USB cable to a USB Port on the PC. Connect the other end of the USB cable to the USB connector on the CP2102 evaluation board. Connect one end of the RS232 serial cable to the DB-9 connector on the CP2102 evaluation board. Connect the other end of the RS232 serial cable to the target serial device. 1 2 USB 4 RS232 CP2102 USB-toUART Bridge Serial Device 3 CP2102 EK Figure 1. Hardware Setup 2 Rev. 0.5 CP2102-EK 5. CP2102 Software Interface If the Virtual COM Port drivers are used, the CP2102 will appear as a COM port in the Device Manager, as shown in Figure 2. The CP2102 will always use the lowest available COM port for operation. For instance, if COM ports 1 and 2 are in use by other peripherals and applications, the CP2102 will use COM 3. The CP2102 functions identically to a COM port from the reference point of both the host application and the serial device, and it can support serial device control requests defined in the Microsoft Win32® Communications API. Examples for how to communicate with the device as a serial COM port are included in AN197 on the www.silabs.com/interface-appnotes page or in the SDK. If the USBXpress drivers are used, the CP2102 will appear as a USB USBXpress device as shown in Figure 2. Examples for how to communicate with the device using the USBXpress interface are included in AN169 on the www.silabs.com/interface-appnotes page. Figure 2. CP2102 in Device Manager Rev. 0.5 3 CP2102-EK 6. Target Board The CP2102 Evaluation Kit includes an evaluation board with a CP2102 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 Figure 3 for the locations of the various I/O connectors. J1 J2 J3 J4 D1 DB9 connector for RS232 interface UART signal access connector USB connector for USB interface Not used SUSPEND indicator LED SUSPEND SUSPEND SUSPEND J3 J4 CP2102 J2 Pin 1 J1 Pin 2 Figure 3. CP2102 Evaluation Board 6.1. Universal Serial Bus (USB) Interface (J3) A Universal Serial Bus (USB) connector (J3) is provided to facilitate connections to the USB interface on the CP2102. See Table 1 for the USB pin definitions. Table 1. USB Connector Pin Descriptions 4 Pin # Description 1 2 3 4 VBUS DD+ GND (Ground) Rev. 0.5 CP2102-EK 6.2. UART Signals (J1, J2) A RS232 transceiver circuit and DB-9 connector (J1) are provided on the evaluation board to connect the CP2102 virtual serial port to external serial devices. See Table 2 for the RS232 J1 pin descriptions. The J2 connector is provided to facilitate direct access to the CP2102’s UART signals. Shorting blocks on J2 are required to connect the UART signals to J1. See Table 3 for J2 pin descriptions. Table 2. RS232 Pin Descriptions Pin Signal CP2102 Direction Description 1 2 3 4 5 6 7 8 9 DCD RXD TXD DTR GND DSR RTS CTS RI Input Input Output Output Data Carrier Detect Receive Data Transmit Data Data Terminal Ready Ground Data Set Ready Request to Send Clear to Send Ring Indicator Input Output Input Input Table 3. J2 Pin Descriptions Pins Signal CP2102 Direction Description 1-2 3-4 5-6 7-8 8-10 11-12 13-14 15-16 TXD RXD DTR RI DCD DSR CTS RTS Output Input Output Input Transmit Data Receive Data Data Terminal Ready Ring Indicator Data Carrier Detect Data Set Ready Clear to Send Request to Send Input Input Output Rev. 0.5 5 CP2102 6 Rev. 0.5 Figure 4. CP2102 Evaluation Board Schematic SUSPEND LED CP2102-EK 7. Schematic CP2102-EK DOCUMENT CHANGE LIST Revision 0.1 to Revision 0.2 Updated Figure 3 on page 4: Pin 1 and Pin 2 labels have been corrected Revision 0.2 to Revision 0.3 Updated CD-ROM contents in Section “1. Kit Contents” to correspond with versions 4.0 and later of the CP210x Drivers and Product Information CDROM. Updated Section “3. Software Setup” to include installation instructions for software included on versions 4.0 and later of the CP210x Drivers and Product Information CD-ROM. Added installation instructions for USBXpress Driver Development Kit in Section “3. Software Setup”. Added screenshots in Section “5. CP2102 Software Interface”, for the Device Manager window after correct installation of driver software. Revision 0.3 to Revision 0.4 Updated "3. Software Setup" on page 1. Revision 0.4 to Revision 0.5 Updated “1. Kit Contents” to change CD-ROM to DVD. Added “2. Relevant Documentation”. Updated “3. Software Setup” to point to the drivers on the website. Updated Figure 1 and Figure 2. Rev. 0.5 7 CP2102-EK CONTACT INFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. Patent Notice Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low-power, small size, analogintensive mixed-signal solutions. Silicon Labs' extensive patent portfolio is a testament to our unique approach and world-class engineering team. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. 8 Rev. 0.5