CP2101EK

CP2101-EK CP2101 E VALUATION K IT U S E R ’ S G U I D E 1. Kit Contents The CP2101 Evaluation Kit contains the following items: CP2101 Evaluation Board RS232 Serial Cable USB Cable Quick Start Guide 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: USBXpress™ Device Configuration and Programming Guide — Customize the VID, PID, serial number, and other parameters stored in the CP2101 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: 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 packages and documentation for the CP2101 kit can be found on the device page (https:// www.silabs.com/interface/usb-bridges/classic/device.cp2101) and include the following: CP210x Drivers (Software & Tools Tab) USBXpress Host SDK (Software & Tools Tab) Documentation: (Tech Docs Tab) CP2101 CP2101 data sheet evaluation kit user's guide (this document) 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: https://www.silabs.com/developers/direct-access-drivers. Click the USBXpress Development Kit link in the Downloads 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:\SiliconLabs\MCU\USBXpress_SDK. Further installation instructions for the WinCE drivers can be found in the ReadMe.txt file contained inside the driver package. Rev. 1.0 1/21 Copyright © 2021 by Silicon Laboratories CP2101-EK CP2101-EK 4. CP2101 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 CP2101 evaluation board. Connect one end of the RS232 serial cable to the DB-9 connector on the CP2101 evaluation board. Connect the other end of the RS232 serial cable to the target serial device. 1 2 USB RS232 CP2101 USB-toUART Bridge 4 Serial Device 3 CP2101 EK Figure 1. Hardware Setup 2 Rev. 1.0 CP2101-EK 5. CP2101 Software Interface If the Virtual COM Port drivers are used, the CP2101 will appear as a COM port in the Device Manager, as shown in Figure 2. The CP2101 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 CP2101 will use COM 3. The CP2101 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 CP2101 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. CP2101 in Device Manager Rev. 1.0 3 CP2101-EK 6. Target Board The CP2101 Evaluation Kit includes an evaluation board with a CP2101 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 Power indicator LED PWR SUSPEND SUSPEND J3 J4 CP2101 J2 Pin 1 J1 Pin 2 Figure 3. CP2101 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 CP2101. 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. 1.0 CP2101-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 CP2101 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 CP2101’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 1 2 3 4 5 6 7 8 9 DCD RXD TXD DTR GND DSR RTS CTS RI CP2101 Direction Input Input Output Output Input Output Input Input Description Data Carrier Detect Receive Data Transmit Data Data Terminal Ready Ground Data Set Ready Request to Send Clear to Send Ring Indicator Table 3. J2 Pin Descriptions Pins Signal 1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16 TXD RXD DTR RI DCD DSR CTS RTS CP2101 Direction Output Input Output Input Input Input Output Rev. 1.0 Description Transmit Data Receive Data Data Terminal Ready Ring Indicator Data Carrier Detect Data Set Ready Clear to Send Request to Send 5 Figure 4. CP2101 Evaluation Board Schematic CP2101-EK 7. Schematic 6 Rev. 1.0 CP2101-EK DOCUMENT CHANGE LIST Revision 0.6 to Revision 0.7  Updated Figure 3 on page 4: Pin 1 and Pin 2 labels have been corrected Revision 0.7 to Revision 0.8 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 Develoment Kit in Section “3. Software Setup”.  Added screenshots in Section “5. CP2101 Software Interface”, for the Device Manager window after correct installation of driver software.  Revision 0.8 to Revision 0.9 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.  Revision 0.9 to Revision 1.0       Updated “1. Kit Contents” to remove DVD. Updated “2. Relevant Documentation”. Updated “3. Software Setup”. Updated “3.1. USBXpress Driver Development Kit”. Updated Table 3 to correct pin "Data Carrier Detect" 8-10 to 9-10. Corrected Figure numbering on Figure 4. Rev. 1.0 7 Simplicity Studio One-click access to MCU and wireless tools, documentation, software, source code libraries & more. Available for Windows, Mac and Linux! SW/HW IoT Portfolio www.silabs.com/IoT www.silabs.com/simplicity Quality www.silabs.com/quality Support & Community www.silabs.com/community Disclaimer Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and “Typical” parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. 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