Silicon Laboratories CP2105 User Manual
CP2105-EK
CP2105 EVALUATION KIT USER ’S GUIDE
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 Communicat ions 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
appropriate directory on the
drivers to the system.
DVD to install the software package. Follow the instructions to install the SDK and
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 e xpertise is req uired. Instead, a simple, high-level Applica tion
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
DVD. For Mac and Linux, browse to the
Rev. 0.5 7/13 Copyright © 2013 by Silicon Laboratories CP2105-EK
CP2105-EK
CP2105 EK
Serial Device
RS232
USB
1
2
4
Serial Device
RS232
6
CP2105 USB-to-
UART Bridge
5
3
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. Connect one end of the USB cable to a USB Port on the PC.
2. Connect the other end of the USB cable to the USB connector on the
3. Connect one end of the RS232 serial cable to the DB-9 connector on the
4. Connect the other end of the RS232 serial cable to the target serial device.
5. (Optional) Connect the second RS232 serial cable to the second DB-9 connector on the
board.
6. (Optional) Connect the other end of the second RS232 serial cable to the second target serial device.
CP2105 evaluation board.
CP2105 evaluation board
CP2105 evaluation
.
2 Rev. 0.5
Figure 1. Hardware Setup
CP2105-EK
5. CP2105 Software Interface
If the Virtual COM Port drivers are used, the CP2105 wi ll 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
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 .
®
Communications
Figure 2. CP2105 in Device Manager
Rev. 0.5 3
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