CP2110

4

Rev. 1.2

1. System Overview

The CP2110 is a highly-integrated HID 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 CP2110 includes a USB 2.0 full-

speed function controller, USB transceiver, oscillator, one-time programmable ROM, and an asynchronous serial

data bus (UART) in compact 4 x 4 mm QFN24 and 5 x 5 mm QFN28 packages (sometimes called “MLF” or

“MLP”).

The on-chip, one-time programmable ROM provides the option to customize the USB Vendor ID, Product ID,

Manufacturer Product String, Product Description String, Power Descriptor, Device Release Number, Device Serial

Number, and GPIO configuration as desired for OEM applications.

The CP2110 uses the standard USB HID device class which is natively supported by most operating systems. A

custom driver does not need to be installed for this device. Windows applications communicate with the CP2110

through a Windows DLL which is provided by Silicon Labs. The interface specification for the CP2110 is also

available to enable development of an API for any operating system that supports HID.

Note: The CP2110 devices will not enumerate as a standard HID mouse or keyboard.

The CP2110 UART interface implements all RS-232 signals, including control and hardware handshaking, so

existing system firmware does not need to be modified. The UART capabilities of the CP2110 include baud rate

support from 300 to 1 Mbps, hardware flow control, support for 5-8 data bits, 5 types of parity and RS-485 support.

The device also features a total of 10 GPIO signals that are user-defined for status and control information. Six of

the GPIO signals support alternate features including hardware flow control (RTS and CTS), a configurable clock

output (24 MHz to 47 kHz), RS-485 transceiver control, and TX and RX LED toggle. On the –GM packages,

internally tied to VDD.

An evaluation kit for the CP2110 (Part Number: CP2110EK) is available. It includes a CP2110-based USB-to-

UART/RS-232 evaluation board, Windows DLL and test application, USB and RS-232 cables, and full

documentation. See www.silabs.com for the latest application notes and product support information for the