CP2101 Silicon Laboratories Inc, CP2101 Datasheet - Page 12

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CP2101

Manufacturer Part Number
CP2101
Description
IC USB-TO-UART BRIDGE 28MLP
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of CP2101

Applications
USB
Interface
USB
Voltage - Supply
3 V ~ 3.6 V
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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6.
The CP2101 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. The data formats and
baud rates available are listed in Table 6.1.
7.
The CP2101 includes an internal EEPROM that 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. Customization of the USB configuration data is optional. If the EEPROM is
not programmed with OEM data, the default configuration data shown in Table 7.1 is used. However, a
unique serial number is required for OEM applications in which it is possible for multiple CP2101-based
devices to be connected to the same PC.
The internal EEPROM is programmed via the USB. This allows the OEM's USB configuration data and
serial number to be written to the CP2101 on-board during the manufacturing and testing process. A
stand-alone utility for programming the internal EEPROM is available from Silicon Laboratories. A library of
routines provided in the form of a Windows
EEPROM programming step into custom software used by the OEM to streamline testing and serial
number management during manufacturing. The EEPROM has a typical endurance of 100,000 write
cycles with a data retention of 100 years.
Name
Vendor ID
Product ID
Power Descriptor (Attributes) 80h
Power Descriptor (Max.
Power)
Release Number
Serial Number
Product Description String
Asynchronous Serial Data Bus (UART) Interface
Internal EEPROM
Data Bits
Stop Bits
Parity Type
Baud Rates
Table 7.1. Default USB Configuration Data
Table 6.1. Data Formats and Baud Rates
8
1
None, Even, Odd
300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200,
28800, 38400, 56000, 57600, 115200, 128000, 230400,
460800, 921600
Value
10C4h
EA60h
32h
0100h
0001 (63 characters maximum)
“CP2101 USB to UART Bridge Controller” (126 characters maximum)
®
DLL is also available. This library can be used to integrate the
Rev. 1.6
CP2101
12

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