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
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 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:
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.
Device
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
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 pre-
liminary 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
J4
CP2102
J2
J1
Pin 2
Pin 1
J3
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
Pin #
1
2
3
4
Description
VBUS
D-
D+
GND (Ground)
4
Rev. 0.5
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