Silicon Labs UG254 User's Guide

Silicon Labs UG254 User's Guide

UG254: CP2102N-MINIEK Kit User's Guide

The CP2102N-MINIEK kit is designed to showcase the various features of the CP2102N USBXpress® devices.

These highly-integrated USB-to-UART bridge controllers provide a simple solution for updating RS-232 designs to USB using a minimum of components and PCB space. By eliminating the need for complex firmware and driver development, the CP2102N devi ces enable quick USB connectivity with minimal development effort.

The kit includes the following: • CP2102N USB-to-UART Bridge Mini Evaluation Board • Getting Started card

KEY FEATURES

• CP2102N USB-to-UART Bridge • Headers for easy access to UART, GPIO, and Battery Charger Detect pins • 0.1" header pitch for breadboard compatibility • Small board size

silabs.com

| Building a more connected world.

Rev. 0.2

UG254: CP2102N-MINIEK Kit User's Guide

Getting Started

1. Getting Started

1. Download and Install the Latest Virtual COM Port (VCP) Drivers.

The Virtual COM Port (VCP) drivers enable the CP2102N to appear as a standard COM port. Download the latest version of driv ers from the Silicon Labs website: http://www.silabs.com/vcpdrivers In most cases, select the default option without serial enumeration.

2. Set Up Your Kit.

a. Provide power to the board by connecting the mini USB connector to the PC using a mini USB cable (not provided). When a connection has been established successfully, the LED (marked in the picture) lights up.

LED silabs.com

| Building a more connected world.

Rev. 0.2 | 2

UG254: CP2102N-MINIEK Kit User's Guide

Getting Started

3. Detect Your Device.

The CP2102N device will appear as a COM port in Device Manager in Windows. As a virtual COM port, the CP210x functions identically to a real 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.

silabs.com

| Building a more connected world.

Rev. 0.2 | 3

4. Set up a Loop-Back Test.

Short the CP210x RXD and TXD pins on header J2.

UG254: CP2102N-MINIEK Kit User's Guide

Getting Started

5. Send and Receive Some Data.

a. In Windows, open a serial terminal program (downloaded separately, RealTerm pictured) to verify the CP2102N UART func tionality.

b. Set the baud rate and select the COM port from Device Manager.

c. Type in the transmit area. The characters should echo back after looping through the CP2102N TXD and RXD pins.

6. Utilize the Available Resources.

The next section includes additional resources available for the device, including documentation and application notes.

silabs.com

| Building a more connected world.

Rev. 0.2 | 4

UG254: CP2102N-MINIEK Kit User's Guide

Relevant Documentation

2. Relevant Documentation

The following Application Notes are applicable to CP2102N devices: • • • • • • •

AN721: CP210x Device Customization Guide

— This application note guides developers through the configuration process of USBXpress devices using Simplicity Studio [

Xpress Configurator

].

AN220: USB Driver Customization

— This document and accompanying software enable the customization of the CP210x Virtual COM Port (VCP) and USBXpress drivers.

AN197: Serial Communications Guide for CP210x

— This document describes recommendations for communicating with USBX press CP210x devices using the Virtual COM Port (VCP) driver.

AN976: Migrating from a CP2102 to a CP2102N

— This document guides developers on how to migrate existing systems using the CP2102 to the CP2102N.

AN169: USBXpress Programmer’s Guide

— This application note provides recommendations and examples for developing using the USBXpress direct-access driver.

AN807: Recertifying a Customized Windows HCK Driver Package

— This document describes the WHQL certification process re quired for customized drivers.

AN223: Runtime GPIO Control for CP210x

— This document describes how to toggle GPIO pins from the USB host.

Application Notes can be accessed on the Silicon Labs website ( www.silabs.com/interface-appnotes ) or in Simplicity Studio using the [

Getting Started

]>[

Application Notes

] area of the launcher.

silabs.com

| Building a more connected world.

Rev. 0.2 | 5

UG254: CP2102N-MINIEK Kit User's Guide

Device Customization

3. Device Customization

Device customization for the CP2102N is done through Xpress Configurator, which is available in Simplicity Studio: http://www.silabs.com/simplicity The Simplicity Studio software package contains all the tools, drivers, configuration software, and documentation needed to use the CP2102N USB-to-UART Bridge Mini Evaluation Board.

After downloading the latest version of Simplicity Studio and installing the software: 1. Install the CP210x Virtual COM Port Driver during the software setup steps, if it's not already installed. This action can always be accessed through [

Help

]>[

Setup Tasks

].

2. Connect the CP2102N to the PC.

3. Select [

CP2102N

] under [

Devices

]. On the board, a successful USB connection is established when the SUSPENDB LED (D2) turns on.

4. Click on [

Compatible Tools

]>[

Xpress Configurator

] to open Xpress Configurator and customize the device.

Documentation for each of the customization options is provided within Xpress Configurator. More information on each of these options can be found in

AN721: CP210x Device Customization Guide

, which is available on the Silicon Labs website ( www.silabs.com/inter face-appnotes ) or within Simplicity Studio under [

Getting Started

]>[

Application Notes

].

silabs.com

| Building a more connected world.

Rev. 0.2 | 6

UG254: CP2102N-MINIEK Kit User's Guide

Driver Options and Software Interface

4. Driver Options and Software Interface

4.1 Virtual COM Port (VCP) Driver

CP2102N devices are pre-programmed with a VID of 0x10C4 and PID of 0xEA60. This VID and PID combination matches the Virtual COM Port (VCP) driver. With this driver, the CP2102N will appear as a COM port and can be accessed using any terminal program or custom-written software. Install the VCP driver as part of the Simplicity Studio installation or download it directly from the Silicon Labs website ( www.silabs.com/interface-software ).

If the Virtual COM Port (VCP) drivers are used, the CP2102N will appear as a COM port in the Device Manager, as shown in the figure below. The CP2102N 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 CP2102N will use COM 3.

The CP2102N 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: Serial Communications Guide for CP210x

or in the SDK.

silabs.com

| Building a more connected world.

Figure 4.1. CP2102N in Device Manager — VCP

Rev. 0.2 | 7

UG254: CP2102N-MINIEK Kit User's Guide

Driver Options and Software Interface

4.2 USBXpress Driver

An alternative driver is the USBXpress® direct-access driver, which is also available on the Silicon Labs website ( www.silabs.com/inter face-software ). Rather than appearing as a COM port, software can use a simple, high-level Application Program Interface (API) to pro vide access to CP2102N for complete USB connectivity. No USB protocol or host device driver expertise is required. The USBXpress Development Kit includes Windows device drivers, Windows device driver installer, and host interface function library (host API) provi ded 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.

If the USBXpress drivers are used, the CP2102N will appear as a USB USBXpress device as shown in the figure below. Examples for how to communicate with the device using the USBXpress interface are included in

AN169: USBXpress Programmer’s Guide

.

Figure 4.2. CP2102N in Device Manager — USBXpress silabs.com

| Building a more connected world.

Rev. 0.2 | 8

UG254: CP2102N-MINIEK Kit User's Guide

Hardware Overview

5. Hardware Overview

The CP2102N Mini Evaluation Kit includes an evaluation board with a CP2102N device pre-installed for evaluation and preliminary soft ware development. Numerous input/output (I/O) connections are provided to facilitate prototyping using the evaluation board. Refer to the figure below for the locations of the various I/O connectors.

Table 5.1. CP2102N Mini Evaluation Board Component Overview Component

D2 J1 J2 J5

Description

SUSPENDb indicator LED USB mini connector Header for UART pins (TX, RX, RTS, CTS), VBUS pin, suspend pins, and Charge Enable pin CHR0 Header for power pins (VDD, VREGIN), reset pin, GPIOs, and Charge Enable pins (CHREN, CHR1)

J5

VDD VDD VREGIN GPIO.0

GPIO.1

GPIO.2

GPIO.3

RSTb CHREN CHR1

J2

GND TXD RXD RTS CTS VBUS SUSPENDb SUSPEND GND CHR0

Figure 5.1. CP2102N Mini Evaluation Board silabs.com

| Building a more connected world.

Rev. 0.2 | 9

UG254: CP2102N-MINIEK Kit User's Guide

Hardware Overview

5.1 USB Interface (J1)

A Universal Serial Bus (USB) mini connector (J1) is provided to facilitate connections to the USB interface on the CP2102N. See the table below for the USB pin definitions.

Table 5.2. USB Mini Connector Pin Descriptions Pin Number

1 2 3 4 5

Description

VBUS D D+ ID (Not Connected) Ground

silabs.com

| Building a more connected world.

Rev. 0.2 | 10

UG254: CP2102N-MINIEK Kit User's Guide

Hardware Overview

5.2 Headers (J2 and J5)

The J2 and J5 headers provides direct access to the CP2102N power, reset, UART, suspend, and charge enable pins. See the table below for the J2 and J5 pin descriptions.

Table 5.3. J2 Pin Descriptions Pins

1 2 3 4 5 6 7 8 9 10

Signal

GND TXD RXD RTS CTS VBUS SUSPENDb SUSPEND GND CHR0

CP2102N Direction

N/A Output Input Output Input Input Output Output N/A Output

Description

Ground Transmit Data Receive Data Request to Send Clear to Send USB VBUS Driven low when device enters USB suspend state.

Driven high when device enters USB suspend state.

Ground Enable charging circuit (500 mA)

Pins

1 2 3 4 5 6 7 8 9 10

Signal

VDD VDD VREGIN GPIO.0

GPIO.1

GPIO.2

GPIO.3

RSTb CHREN CHR1

Table 5.4. J5 Pin Descriptions CP2102N Direction

Output Output Input Input / Output Input / Output Input / Output Input / Output Input Output Output

Description

5V Regulator Output 5V Regulator Output 5V Regulator Input General Purpose I/O 0 General Purpose I/O 1 General Purpose I/O 2 General Purpose I/O 3 Active-low Reset Enable charging circuit (100 mA) Enable charging circuit (1.5 A)

silabs.com

| Building a more connected world.

Rev. 0.2 | 11

UG254: CP2102N-MINIEK Kit User's Guide

Schematics and BOM

6. Schematics and BOM

6.1 Board Files

The schematics and bill of materials (BOM) for the CP2102N USB-to-UART Bridge Mini Evaluation Board are available through Sim plicity Studio when the kit documentation package has been installed. To access these documents, click the [

Documentation

] tab in the launcher, and manually specify the connected board.

6.2 Board Revision History Rev00 Boards

• Initial production revision.

• BOM specifies CP2102N-A01 chip revision.

Rev00 errata: • Board does not include required voltage divider on VBUS pin as described in section 2.3 of the CP2102N Datasheet .

Rev 2.0 Boards

• Second production revision.

• BOM specifies CP2102N-A02 chip revision.

• Added voltage divider to VBUS pin.

• Added optional pulldown resistor for line break support (CP2102N-A02 only).

Rev 2.0 errata: • These boards do not currently have any known issues.

silabs.com

| Building a more connected world.

Rev. 0.2 | 12

7. Revision History

Revision 0.1

October, 2016 • Initial revision.

Revision 0.2

December, 2019 • Updated Revision History format.

• Updated images throughout to reflect hardware revision 2.0.

• Updated 6.2 Board Revision History

to reflect hardware revision 2.0.

• Corrected error in pinout diagram in Figure 5.1 CP2102N Mini Evaluation Board on page 9

.

UG254: CP2102N-MINIEK Kit User's Guide

Revision History

silabs.com

| Building a more connected world.

Rev. 0.2 | 13

Simplicity Studio

One-click access to MCU and wireless tools, documentation, software, source code libraries & more. Available for Windows, Mac and Linux!

IoT Portfolio

www.silabs.com/IoT

SW/HW

www.silabs.com/simplicity

Quality

www.silabs.com/quality

Support and Community

community.silabs.com

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. Silicon Labs reserves the right to make changes without further notice to the product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Without prior notification, Silicon Labs may update product firmware during the manufacturing process for security or reliability reasons. Such changes will not alter the specifications or the performance of the product. Silicon Labs shall have no liability for the consequences of use of the information supplied in this document. This document does not imply or expressly grant any license to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any FDA Class III devices, applications for which FDA premarket approval is required , or Life Support Systems without the specific written consent of Silicon Labs. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Silicon Labs disclaims all express and implied warranties and shall not be responsible or liable for any injuries or damages related to use of a Silicon Labs product in such unauthorized applications.

Trademark Information

Silicon Laboratories Inc.®, Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clock B uilder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, Gecko OS, Gecko OS Studio, ISOmodem®, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress® , Zentri, the Zentri logo and Zentri DMS, Z Wave®, and others are trademarks or registered trademarks of Silicon Labs. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of ARM Holdings. Keil is a registered trademark of ARM Limited. Wi-Fi is a registered trademark of the Wi-Fi Alliance. All other products or brand names mentioned herein are trademarks of their respective holders.

Silicon Laboratories Inc.

400 West Cesar Chavez Austin, TX 78701 USA

http://www.silabs.com

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement