Silicon Laboratories CP2102-GM, CP2102 Datasheet

SINGLE-CHIP USB TO UART BRIDGE

CP2102

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 and greater

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 MLP (5 x 5 mm)

Ordering Part Number

 CP2102-GM

Temperature Range: –40 to +85 °C

VDD

9

(to exte rnal circuitry

12

for USB suspend
states)

11

2

RI

1

External RS-232

28

transceiver or

UART circuitry

27

26

25

24

23

USB

CONNECTOR

VBUS

D-

D+

GND

5

6

7

REGIN

6

VDD

3

GND

8

VBUS

1

2

3

4

D1 D2 D3

5

D-

4

D+

Voltage

IN

Regulator

OUT

USB

Transceiver

3.3 V

48 MHz

Oscillator

USB Function

1024B

EEPROM

Controller

640B

TX

Buffer

576B

RX

Buffer

UART

RST

SUSPEND

SUSPEND

DCD

DTR

DSR

TXD

RXD

RTS

CTS

CP2102

Figure 1. Example System Diagram

Rev. 1.0 10/04 Copyright © 2004 by Silicon Laboratories CP2102

CP2102

2 Rev. 1.0

CP2102

TABLE OF CONTENTS

Section Page

1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

3. Global DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

4. Pinout and Package Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

5. USB Function Controller and Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6. Asynchronous Serial Data Bus (UART) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

7. Internal EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8. Virtual Com Port Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

9. USBXpress Direct Driver Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

10. Voltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Rev. 1.0 3

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 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 Silicon Laboratories allow a CP2102-based
product to appear as a COM port to PC applications. The CP2102 UART interface implements all RS-232 signals,
including control and handshaking signals, so existing system firmware does not need to be modified. In many
existing RS-232 designs, all that is required to update the design from RS-232 to USB is to replace the RS-232
level-translator with the CP2102.

An evaluation kit for the CP2102 (Part Number: CP2102EK) is available. It includes a CP2102-based USB-to­UART/RS-232 evaluation board, a complete set of VCP device drivers, USB and RS-232 cables, and full
documentation. Contact a Silicon Labs’ sales representatives or go to www.silabs.com to order the CP2102
Evaluation Kit.

4 Rev. 1.0

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

Voltage on V

with respect to GND –0.3 — 4.2 V

DD

Maximum Total current through V

Maximum output current sunk by RST

Note: Stresses above those listed may cause permanent damage to the device. This is a stress rating only, and functional

operation of the devices at or exceeding the conditions in the operation listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods may affect device reliability.

with respect to GND –0.3 — 5.8 V

and GND — — 500 mA

DD

or any I/O pin — — 100 mA

3. Global DC Electrical Characteristics

Table 2. Global DC Electrical Characteristics

VDD= 2.7 to 3.6 V, –40 to +85 °C unless otherwise specified.

Parameter Conditions Min Typ Max Units

Supply Voltage 3.0 3.3 3.6 V

Supply Current V

Supply Current in Suspend V

Specified Operating Temperature Range –40 — +85 °C

= 3.3 V — 26 — mA

DD

= 3.3 V — 330 — µA

DD

Table 3. UART and Suspend I/O DC Electrical Characteristics

VDD= 2.7 to 3.6 V, –40 to +85 °C unless otherwise specified.

Parameters Conditions Min Typ Max UNITS

Output High Voltage I

Output Low Voltage I

OH

I

=–10µA

OH

I

=–10mA

OH

=8.5mA

OL

I

OL

I

OL

=–3mA

=10µA
=25mA

VDD – 0.7
VDD – 0.1

—

—
—
—

—
—

VDD – 0.8

—
—

1.0

Input High Voltage 2.0 — — V

Input Low Voltage — — 0.8 V

Input Leakage Current — 25 50 µA

Rev. 1.0 5

—
—
—

0.6

0.1
—

V

V