Data Sheet

ManualsBrandsWaveshare ManualsSerial TTL / CMOSCP2102Micro USB to UART Adapter Board

CP2102

SINGLE-CHIP USB TO UART BRIDGE

Single-Chip USB to UART Data Transfer

 Integrated USB transceiver; no external resistors

required

 Integrated clock; no external crystal required

 Integrated 1024-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: 3.3 V output

 100% pin and software compatible with CP2101

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: 5, 6, 7, and 8

- Stop bits: 1, 1.5, and 2

- Parity: odd, even, mark, space, no parity

 Baud rates: 300 bps to 1 Mbits

 576 Byte receive buffer; 640 byte transmit buffer

 Hardware or X-On/X-Off handshaking supported

 Event character support

 Line break transmission

Virtual COM Port Device Drivers

 Works with existing COM Port PC applications

 Royalty-free distribution license

 Windows 98 SE/2000/XP

 MAC OS-9

 MAC OS-X

 Linux 2.40

USBXpress™ Direct Driver 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: 3.0 to 3.6 V

 USB bus powered: 4.0 to 5.25 V

Package

 Lead free 28-pin QFN (5 x 5 mm)

Ordering Part Number

 CP2102-GM

Temperature Range: –40 to +85 °C

Figure 1. Example System Diagram

CP2102

3.3 V

Voltage

Regulator

48 MHz

Oscillator

OUT

SUSPEND

REGIN

GND

RST

D+

D-

UART

DCD

CTS

RTS

RXD

TXD

DSR

DTR

External RS-232

transceiver or

UART circuitry

(to external circuitry

for USB suspend

states)

VBUS

D-

D+

GND

USB

CONNECTOR

VDD

VBUS

USB Function

Controller

USB

Transceiver

640B

Buffer

576B

Buffer

1024B

EEPROM

VDD

D1 D2 D3

Summary of content (18 pages)

PAGE 1
CP2102 S I N G L E - C H I P USB T O UART B R I D G E Single-Chip USB to UART Data Transfer Virtual COM Port Device Drivers Integrated USB transceiver; no external resistors required Integrated clock; no external crystal required Integrated 1024-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.
PAGE 2
CP2102 2 Rev. 1.
PAGE 3
CP2102 TA B L E O F C O N T E N TS Section Page 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 3. Global DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 4. Pinout and Package Definitions . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
CP2102 1. System Overview The CP2102 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS-232 designs to USB using a minimum of components and PCB space. The CP2102 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 5 x 5 mm QFN-28 package. No other external USB components are required.
PAGE 5
CP2102 2. Absolute Maximum Ratings Table 1. Absolute Maximum Ratings Parameter Conditions Min Typ Max Units Ambient temperature under bias –55 — 125 °C Storage Temperature –65 — 150 °C Voltage on any I/O Pin or RST with respect to GND –0.3 — 5.8 V Voltage on VDD with respect to GND –0.3 — 4.
PAGE 6
CP2102 4. Pinout and Package Definitions Table 4. CP2102 Pin Definitions Name Pin # Type VDD 6 Power In Description 3.0–3.6 V Power Supply Voltage Input. Power Out 3.3 V Voltage Regulator Output. See Section 10. GND 3 Ground RST 9 D I/O Device Reset. Open-drain output of internal POR or VDD monitor. An external source can initiate a system reset by driving this pin low for at least 15 µs. REGIN 7 Power In 5 V Regulator Input. This pin is the input to the on-chip voltage regulator.
PAGE 7
DTR DSR TXD RXD RTS CTS NC 27 26 25 24 23 22 GND 28 CP2102 DCD 1 21 NC RI 2 20 NC GND 3 19 NC D+ 4 18 NC D- 5 17 NC VDD 6 16 NC REGIN 7 15 NC CP2102 Top View 8 9 10 11 12 13 14 VBUS RST NC SUSPEND SUSPEND NC NC GND Figure 2. QFN-28 Pinout Diagram (Top View) Rev. 1.
PAGE 8
CP2102 14 13 12 11 15 6 16 D2 5 D2 2 17 e 4 2 20 21 22 23 24 25 26 27 DETAIL 1 28 1 18 19 E2 2 3 R 6xe E 10 9 Table 5. QFN-28 Package Dimensions L 7 E2 b 8 Bottom View 6xe D A A2 Side View A1 e A3 A A1 A2 A3 b D D2 E E2 e L N ND NE R AA BB CC DD DETAIL 1 CC DD BB AA Figure 3. QFN-28 Package Drawing 8 Rev. 1.1 MIN 0.80 0 0 — 0.18 — 2.90 — 2.90 — 0.45 — — — 0.09 — — — — MM TYP 0.90 0.02 0.65 0.25 0.23 5.00 3.15 5.00 3.15 0.5 0.55 28 7 7 — 0.435 0.435 0.
PAGE 9
CP2102 0.30 mm 0.50 mm 0.85 mm 0.35 mm 0.50 mm 0.10 mm 0.20 mm 0.20 mm 0.50 mm Top View b 0.20 mm D D2 Optional GND Connection L e E2 0.20 mm 0.30 mm 0.50 mm 0.85 mm 0.35 mm 0.10 mm E Figure 4. Typical QFN-28 Landing Diagram Rev. 1.
PAGE 10
CP2102 0.30 mm 0.35 mm 0.50 mm 0.60 mm 0.20 mm 0.10 mm 0.85 mm 0.50 mm 0.20 mm 0.20 mm 0.50 mm Top View 0.60 mm 0.30 mm 0.70 mm b 0.20 mm e L E2 0.20 mm 0.30 mm 0.50 mm 0.85 mm 0.35 mm 0.10 mm E Figure 5. Typical QFN-28 Solder Paste Diagram 10 Rev. 1.1 D D2 0.
PAGE 11
CP2102 5. USB Function Controller and Transceiver The Universal Serial Bus function controller in the CP2102 is a USB 2.0 compliant full-speed device with integrated transceiver and on-chip matching and pull-up resistors. The USB function controller manages all data transfers between the USB and the UART as well as command requests generated by the USB host controller and commands for controlling the function of the UART.
PAGE 12
CP2102 6. Asynchronous Serial Data Bus (UART) Interface The CP2102 UART interface consists of the TX (transmit) and RX (receive) data signals as well as the RTS, CTS, DSR, DTR, DCD, and RI control signals. The UART supports RTS/CTS, DSR/DTR, and X-On/X-Off handshaking. The UART is programmable to support a variety of data formats and baud rates. The data format and baud rate programmed into the UART is set during COM port configuration on the PC.
PAGE 13
CP2102 8. Virtual Com Port Device Drivers The CP210x Virtual COM Port (VCP) device drivers allow a CP2102-based device to appear to the PC's application software as an additional COM port (in addition to any existing hardware COM ports). Application software running on the PC accesses the CP2102-based device as it would access a standard hardware COM port. However, actual data transfer between the PC and the CP2102 device is performed over the USB.
PAGE 14
CP2102 CP2102 VBUS VBUS Sense From VBUS REGIN 5 V In Voltage Regulator (REG0) 3 V Out To 3 V Power Net VDD Device Power Net Figure 7. Configuration 1: USB Bus-Powered CP2102 From VBUS VBUS VBUS Sense From 5 V Power Net REGIN 5 V In Voltage Regulator (REG0) 3 V Out To 3V Power Net VDD Device Power Net Figure 8. Configuration 2: USB Self-Powered 14 Rev. 1.
PAGE 15
CP2102 CP2102 From VBUS VBUS VBUS Sense REGIN 5 V In Voltage Regulator (REG0) 3 V Out From 3 V Power Net VDD Device Power Net Figure 9. Configuration 3: USB Self-Powered, Regulator Bypassed Rev. 1.
PAGE 16
CP2102 Document Change List Revision 1.0 to Revision 1.1 Updated “Linux 2.40” bullet on page 1. Changed MLP to QFN throughout. 16 Rev. 1.
PAGE 17
CP2102 NOTES: Rev. 1.
PAGE 18
CP2102 CONTACT INFORMATION Silicon Laboratories Inc. 4635 Boston Lane Austin, TX 78735 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: MCUinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.