CP2101 datasheet, PDF - EEWORLD Datasheet

CP2101: Descriptionsingle-chip usb to uart bridge; File Size238KB，14 Pages; ManufacturerETC

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single-chip usb to uart bridge

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Preliminary

CP2101

Single-Chip USB to UART Bridge

SINGLE-CHIP USB to UART DATA TRANSFER

Integrated USB Transceiver; No External Resistors

VIRTUAL COM PORT DEVICE DRIVERS

Works with Existing COM Port PC Applications

Royalty-Free Distribution License

Windows 98/Me/2000/XP

MAC OS-9

MAC OS-X

Windows CE *

Linux 2.40 and greater *

* (Contact factory for availability)

Required

Integrated Clock; No External Crystal Required

Integrated 512-Byte EEPROM for Vendor ID, Product ID,

Serial Number, Power Descriptor, Release Number and

Product Description Strings

On-Chip Power-On Reset Circuit

On-Chip Voltage Regulator: 3.3V Output

USB FUNCTION CONTROLLER

USB Specification 2.0 Compliant; Full Speed (12 Mbps)

USB suspend states supported via SUSPEND pins

ASYNCHRONOUS SERIAL DATA BUS (UART)

All Handshaking and Modem Interface Signals

Data Formats Supported:

•

Data Bits: 8

•

Stop Bits: 1, 2

•

Parity: Odd, Even, No Parity

Baud Rates: 300bps to 921.6kbps

512 Byte Receive Buffer; 512 Byte Transmit Buffer

Hardware or X-On / X-Off Handshaking Supported

Event Character and Line Break Condition Support

EXAMPLE APPLICATIONS

Upgrade of RS-232 Legacy Devices to USB

Cellular Phone USB Interface Cable

PDA USB Interface Cable

USB to RS-232 Serial Adapter

SUPPLY VOLTAGE

Self-powered: 3.0V to 3.6V

USB Bus Powered: 4.0V to 5.25V

PACKAGE

28-pin MLP (5mm X 5mm)

TEMPERATURE RANGE: -40°C TO +85°C

Example Circuit Diagram

1uF

REGIN

Voltage

Regulator

OUT

CP2101

/RST

SUSPEND

4.7uF

TANT

VDD

3.3V

(to external circuitry

for USB suspend

states)

/SUSPEND

GND

USB

CONNECTOR

VBUS

D-

D+

GND

VBUS

48MHz

Oscillator

DCD

DTR

DSR

TXD

RXD

RTS

CTS

0.1uF

External RS-232

transceiver or

UART circuitry

D-

D+

USB

Transceiver

USB Function

Controller

512B

EEPROM

512B 512B

Xmit

Rcv

Buffer Buffer

UART

DS014-1.0 AUG03

CYGNAL Integrated Products, Inc.

Page 1

Preliminary

TABLE OF CONTENTS

CP2101

1. SYSTEM OVERVIEW ...........................................................................................................5

2. ABSOLUTE MAXIMUM RATINGS ....................................................................................5

Table 2.1. Absolute Maximum Ratings* ..................................................................................5

3. GLOBAL DC ELECTRICAL CHARACTERISTICS ........................................................6

Table 3.1. Global DC Electrical Characteristics .......................................................................6

4. PINOUT AND PACKAGE DEFINITIONS..........................................................................6

Table 4.1. Pin Definitions for the CP2101................................................................................6

Figure 4.1. MLP-28 Pinout Diagram (Top View) .....................................................................7

Figure 4.2. MLP-28 Package Drawing ......................................................................................8

Table 4.2. MLP-28 Package Dimensions .................................................................................8

Figure 4.3. Typical MLP-28 Landing Diagram .........................................................................9

Figure 4.4. Typical MLP-28 Solder Mask ...............................................................................10

5. USB FUNCTION CONTROLLER AND TRANSCEIVER ..............................................11

6. ASYNCHRONOUS SERIAL DATA BUS (UART) INTERFACE ...................................11

Table 6.1. Data Formats and Baud Rates................................................................................11

7. INTERNAL EEPROM..........................................................................................................12

Table 7.1. Default USB Configuration Data...........................................................................12

8. VIRTUAL COM PORT DEVICE DRIVERS.....................................................................12

9. VOLTAGE REGULATOR...................................................................................................13

Table 9.1. Voltage Regulator Electrical Specifications ..........................................................13

DS014-1.0 AUG03

Page 3

Preliminary

SYSTEM OVERVIEW

CP2101

The CP2101 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS232

designs to USB using a minimum of components and PCB space. The CP2101 includes a USB 2.0 full-speed

function controller, USB transceiver, oscillator, EEPROM and asynchronous serial data bus (UART) with full modem

control signals in a compact 5mm X 5mm MLP-28 package. No other external USB components are required.

The on-chip EEPROM may be used to customize the USB Vendor ID, Product ID, Product Description String, Power

Descriptor, Device Release Number and Device Serial Number as desired for OEM applications. The EEPROM is

programmed on-board via the USB allowing the programming step to be easily integrated into the product

manufacturing and testing process.

Royalty-free Virtual COM Port (VCP) device drivers provided by Cygnal allow a CP2101-based product to appear as

a COM port to PC applications. The CP2101 UART interface implements all RS232 signals, including control and

handshaking signals, so existing system firmware does not need to be modified. In many existing RS232 designs, all

that is required to update the design from RS232 to USB is to replace the RS232 level-translator with the CP2101.

An evaluation kit for the CP2101 (Part Number: CP2101EK) is available. It includes a CP2101-based USB-to-

UART/RS232 evaluation board, a complete set of VCP device drivers, USB and RS232 cables and full

documentation. Contact any of Cygnal's sales representatives or go to www.cygnal.com to order the CP2101

Evaluation Kit.

ABSOLUTE MAXIMUM RATINGS

Table 2.1. Absolute Maximum Ratings

PARAMETER

CONDITIONS

MIN

-55

-65

-0.3

TYP

MAX

125

150

5.8

4.2

500

100

UNITS

°C

Ambient temperature under bias

Storage Temperature

Voltage on any I/O Pin or /RST with respect to

GND

Voltage on VDD with respect to GND

Maximum Total current through VDD and GND

Maximum output current sunk by /RST or any

I/O pin

Note: stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the devices at those or any other conditions above those indi-

cated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

DS014-1.0 AUG03

Page 5

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