CP2105-EK CP2105 E VALUATION K IT U SER ’ S G UIDE 1. Kit Contents The CP2105 Evaluation Kit contains the following items: CP2105 Evaluation Board RS232 Serial Cable USB Cable DVD 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: CP210x/CP211x Device Customization Guide — Customize the VID, PID, serial number, and other parameters stored in the CP2105 one-time programmable ROM. 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. AN223: Port Configuration and GPIO for CP210x — Programming guide and DLL for runtime control of the CP2105 GPIO pins. AN571: CP210x Virtual COM Port Interface — USB interface details for CP210x devices. 3. Software Setup The Software Development Kit (SDK) for the CP2105 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 Rev. 0.5 7/13 Copyright © 2013 by Silicon Laboratories CP2105-EK CP2105-EK 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. 4. CP2105 Hardware Interface The evaluation board is connected to a PC as shown in Figure 1. 1. 2. 3. 4. 5. 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 CP2105 evaluation board. Connect one end of the RS232 serial cable to the DB-9 connector on the CP2105 evaluation board. Connect the other end of the RS232 serial cable to the target serial device. (Optional) Connect the second RS232 serial cable to the second DB-9 connector on the CP2105 evaluation board. 6. (Optional) Connect the other end of the second RS232 serial cable to the second target serial device. 1 2 USB 3 4 RS232 Serial Device CP2105 USB-toUART Bridge RS232 5 Serial Device 6 CP2105 EK Figure 1. Hardware Setup 2 Rev. 0.5 CP2105-EK 5. CP2105 Software Interface If the Virtual COM Port drivers are used, the CP2105 will appear as two COM ports in the Device Manager, as shown in Figure 2. The CP2105 will always use the lowest available COM ports for operation. For instance, if COM ports 1 and 2 are in use by other peripherals and applications, the CP2105 will use COM 3 and COM 4. The CP2105 functions identically to two COM ports from the reference point of both the host application and the serial devices, and it can support serial device control requests defined in the Microsoft Win32® Communications API. Examples for how to communicate with the device as two serial COM ports are included in AN197 on the www.silabs.com/interface-appnotes page or in the SDK. If the USBXpress drivers are used, the CP2105 will appear as two USB USBXpress devices 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. CP2105 in Device Manager Rev. 0.5 3 CP2105-EK 6. Target Board The CP2105 Evaluation Kit includes an evaluation board with a CP2105 device preinstalled 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. P1 P2 P3 J1 J2, J3 J4 J6 J7, J8 DSS–DS4 DS5 USB connector for USB interface DB9 connector for Standard RS232 interface DB9 connector for Enhanced RS232 interface Enhanced UART signal access connector GPIO access connector Power connector Standard UART signal access connector SUSPEND LED source connector Green GPIO LEDs Red SUSPEND indicator LED J6 CP2105-EK P3 J2 DS0 DS1 RS232 Transceiver Pin 1 Enhanced Pin 2 P1 J8 ______ CP2105 J7 SUSPEND LED DS5 P2 RS232 Transceiver Pin 1 J3 Standard Pin 2 J4 J1 DS2 DS3 DS4 Figure 3. CP2105 Evaluation Board with Default Shorting Blocks Installed 6.1. LED Headers (J2, J3) Connectors J2 and J3 are provided to allow access to the GPIO pins on the CP2105 when in GPIO mode. Place shorting blocks on J2 and J3 to connect the GPIO pins to the five green LEDs DS0–DS4. These LEDs can be used to indicate active communications through the CP2105. Table 1 shows the LED corresponding to each header position. When using the CP2105 in Modem mode, the shorting blocks on J2 and J3 should be removed. Table 1. J2 and J3 LED Locations 4 LED Pins DS0 J2[1:2] DS1 J2[3:4] DS2 J3[1:2] DS3 J3[3:4] DS4 J3[5:6] Rev. 0.5 CP2105-EK 6.2. Universal Serial Bus (USB) Interface (P1) A Universal Serial Bus (USB) connector (P1) is provided to facilitate connections to the USB interface on the CP2105. See Table 2 for the USB pin definitions. Table 2. USB Connector Pin Descriptions Pin # Description 1 2 3 4 VBUS DD+ GND (Ground) 6.3. UART Signals (P2, P3, J1, J6) Two RS232 transceiver circuits and DB-9 connectors (P2, P3) are provided on the evaluation board to connect the CP2105 virtual serial ports to external serial devices. See Table 3 for the RS232 P2 and P3 pin descriptions. The J2 and J6 connectors are provided to facilitate direct access to the CP2105’s UART signals. Shorting blocks on J1 are required to connect the Standard UART signals to P2, and the shorting blocks on J6 are required to connect the Enhanced UART signals to P3. See Table 4 for J1 and J6 pin descriptions. Table 3. RS232 Pin Descriptions Pin Signal 1 2 3 4 5 6 7 8 9 DCD RXD TXD DTR GND DSR RTS CTS RI CP2105 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 4. J1, J6 Pin Descriptions Pins Signal CP2105 Direction Description 1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16 TXD RXD DTR RI DCD DSR CTS RTS Output Input Output Input Input Input Input Output Transmit Data Receive Data Data Terminal Ready Ring Indicator Data Carrier Detect Data Set Ready Clear to Send Request to Send Rev. 0.5 5 CP2105-EK 6.4. Power Connector (J4) This header (J4) is included on the evaluation board to provide several power options. The following describes the functions of the pins. Pins 1–2 connect CP2105 VIO input (Pin 5) to CP2105 VDD (Pin 6). Remove the shorting block to power VIO from an external source. Pins 3–4 connect the main +3 V net to the CP2105 VDD (Pin 6). The main +3 V net powers the other components (five green LEDs and RS-232 Sipex Part) on the board. 6.5. SUSPEND LED Source Selector(J7, J8) These headers (J7, J8) are included on the evaluation board to provide several options for the SUSPEND LED source. The following describes the function of each pin: J7[1:2] connects CP2105 Standard UART SUSPEND output (Pin 1) to the SUSPEND LED. connects CP2105 Enhanced UART SUSPEND output (Pin 17) to the SUSPEND LED. J7[2]:J8[1] connects the main +3 V net to the SUSPEND LED. This will cause the SUSPEND LED to act as a power LED. J7[2:3] 6 Rev. 0.5 Figure 4. CP2105 Evaluation Board Schematic CP2105-EK 7. Schematic Rev. 0.5 7 CP2105-EK DOCUMENT CHANGE LIST Revision 0.1 to Revision 0.2 Updated Windows installation instructions for VCP drivers. Updated Windows installation instructions for USBXpress drivers. Revision 0.2 to Revision 0.3 Updated Figure 3 with shorting blocks installed. Revision 0.3 to Revision 0.4 Updated "Figure 2. CP2105 in Device Manager" on page 3. 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. 8 Rev. 0.5 CP2105-EK NOTES: Rev. 0.5 9 CP2105-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. 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