USB转UART芯片CP2102数据手册_cp2102电路

CP2102N

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USBXpress™ Family

CP2102N Data Sheet

The CP2102N devices, part of the USBXpress family, are de-

signed to quickly add USB to your applications by eliminating

firmware complexity and reducing development time.

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.

CP2102N includes a USB 2.0 full-speed function controller, USB transceiver, oscillator,

and Universal Asynchronous Receiver/Transmitter (UART) in packages as small as 3

mm x 3 mm. No other external USB components are required for development. All cus-

tomization and configuration options can be selected using a simple GUI-based config-

urator. By eliminating the need for complex firmware and driver development, the

CP2102N devices enable quick USB connectivity with minimal development effort.

CP2102N is ideal for a wide range of applications, including the following:

KEY FEATURES

• No firmware development required

• Simple GUI-based configurator

• Integrated USB transceiver; no external

resistors required

• Integrated clock; no external crystal

required

• USB 2.0 full-speed compatible

• Data transfer rates up to 3 Mbaud

• USB Battery Charger Detection (USB BCS

1.2 Specification)

• Remote wakeup for waking a suspended

host

• Low operating current : 9.5 mA

• Royalty-free Virtual COM port drivers

• POS terminals

• USB dongles

• Gaming controllers

• Medical equipment

• Data loggers

External RS-232

transceiver or

UART circuitry

External

circuitry for

USB suspend

states

CP2102N

48 MHz

Oscillator

USB Battery

Charger

Detect

Remote

Wakeup

USB Connector

External battery

charging

circuitry

Voltage

Regulator

USB Function

Controller

512 byte

RX Buffer

960 byte

Configuration

Memory

UART

Hardware

Handshaking

RS485

USB

Transceiver

512 byte

TX Buffer

Feature is related to:

UARTUSB Overall System

silabs.com | Building a more connected world. Rev. 1.2

1. Feature List and Ordering Information

2102N

– A – R

Tape and Reel (Optional)

Package Type — QFN20, QFN24, or QFN28

Firmware Revision

Hardware Revision

QFN20

Temperature Grade — –40 to +85 °C (G)

Silicon Labs Xpress Product Line

USBXpress Family, USB-to-UART Bridge

Figure 1.1. CP2102N Part Numbering

The CP2102N devices have the following features:

• Single-Chip USB-to-UART Data Transfer

• Integrated USB transceiver; no external resistors required

• Integrated clock; no external crystal required

• Internal 960-byte programmable ROM for vendor ID, prod-

uct ID, serial number, power descriptor, release number,

and product description strings

• On-chip power-on reset circuit

• On-chip voltage regulator — 3.3 V output

• Pin compatible with CP2101/2/9 (QFN28 package)

• Pin compatible with CP2104 (QFN24 package)

• USB Function Controller

• USB Specification 2.0 compliant; full-speed (12 Mbps)

• USB suspend states supported via SUSPEND pins

• USB Battery Charger Detection (USB BCS 1.2 Specifica-

tion)

• Remote wakeup for waking a suspended host

• Single power supply of 3.0 to 3.6 V or 3.0 to 5.25 V

• Universal Asynchronous Receiver/Transmitter (UART)

• All handshaking and modem interface signals

• Data formats supported

• Data bits — 5, 6, 7, and 8

• Stop bits — 1, 1.5, and 2

• Parity — odd, even, mark, space, no parity

• Baud rates: 300 baud to 3 Mbaud

• 512 byte receive buffer

• 512 byte transmit buffer

• Hardware or Xon/Xoff handshaking supported

• Virtual COM Port Device Drivers

• Works with existing COM port Applications

• Supported on Windows, Mac, and Linux

• Royalty-free distribution license

• Direct Driver Support

• Royalty-free distribution license

Table 1.1. Product Selection Guide

Ordering

Part Number

GPIOs

Battery Charger Detect

Separate VIO

and VDD Pins

Pb-free

(RoHS Compliant)

Temperature Range

Package

CP2102N-A01-GQFN28 7 Yes — Yes -40 to +85 °C QFN28

CP2102N-A01-GQFN24 4 — Yes Yes -40 to +85 °C QFN24

CP2102N-A01-GQFN20 4 — — Yes -40 to +85 °C QFN20

Note:

1. Devices with the same ordering part number may have different types of pin 1 indicators. However, all of these variants can use

the same landing diagram as long as the recommended landing diagram instructions are followed.

CP2102N Data Sheet

Feature List and Ordering Information

silabs.com | Building a more connected world. Rev. 1.2 | 2

Table of Contents

1. Feature List and Ordering Information ......................2

2. Typical Connection Diagrams .........................5

2.1 Power ................................5

2.2 Battery Charger Detect ...........................7

2.3 USB .................................8

3. Electrical Specifications ..........................10

3.1 Electrical Characteristics ..........................10

3.1.1 Recommended Operating Conditions ....................10

3.1.2 Power Consumption..........................10

3.1.3 Reset and Supply Monitor ........................11

3.1.4 Configuration Memory .........................11

3.1.5 Internal Oscillator...........................11

3.1.6 5 V Voltage Regulator .........................12

3.1.7 GPIO ...............................13

3.1.8 USB Transceiver ...........................14

3.2 Thermal Conditions ............................14

3.3 Absolute Maximum Ratings .........................15

3.4 Typical Performance Curves .........................16

4. Functional Description ........................... 17

4.1 USB Function Controller and Transceiver ....................17

4.2 Universal Asynchronous Receiver/Transmitter (UART) Interface .............17

4.2.1 Baud Rate Generation .........................18

4.3 Additional Features ............................18

4.3.1 General Purpose Input/Outputs (GPIO) ...................18

4.3.2 Dynamic Suspend ..........................19

4.3.3 Output Mode ............................19

4.3.4 Battery Charging (CHREN, CHR0, and CHR1) .................19

4.3.5 Remote Wakeup (WAKEUP) .......................19

4.3.6 Clock Output (CLK) ..........................20

4.3.7 Hardware Handshaking (RTS and CTS) ...................20

4.3.8 Software Handshaking .........................21

4.3.9 Data Throughput Optimization ......................21

4.3.10 Transmit and Receive LED Toggles (TXT and RXT) ..............22

4.3.11 Modem Control (DSR, DTR, DCD, RI) ...................22

4.3.12 RS485 (RS485) ...........................23

4.4 Drivers ................................23

4.4.1 Virtual COM Port (VCP) Drivers ......................23

4.4.2 USBXpress Drivers ..........................24

4.4.3 Customization and Certification ......................24

4.5 Device Customization ...........................25

silabs.com

| Building a more connected world. Rev. 1.2 | 3

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