Download USB Bridge Solutions (PDF)

I N T E R FAC E SOLUTIONS
USB Bridge Solutions
www.silabs.com/usb
CP21xx FEATURES
•USB 2.0 Compliant, full-speed (12 Mbps)
•No external crystal required
•Up to 1024 Bytes of EEPROM or EPROM
DESCRIPTION
•User programmable custom Baud rates
Silicon Labs’ new CP21xx USB bridge ICs eliminate software complexity and
•Supports all modem interface signals
driver compatibility issues, providing a cost-effective, small-footprint turnkey
•Baud rates up to 2 Mbps
solution for adding USB and human interface device (HID)-USB connectivity to
•Industrial temperature range -40 to 85 °C
applications such as personal medical devices, cellular and cordless phones,
•SMBus master device (CP2112)
smart card and flash card readers, personal digital assistants, MP3 players,
bar code readers, wireless modems and industrial control systems.
•HID class support, no driver installation
needed (CP2112)
With the rapid proliferation of USB and HID-USB in the embedded world,
APPLICATIONS
developers are looking for painless, economical ways to embed USB connectivity
in their designs. A leading supplier of USB connectivity solutions, Silicon
Labs developed the CP21xx bridge family so that designers can add USB to
microcontroller-based applications without the cost and complexity of developing
sophisticated USB software. The CP21xx ICs require no USB expertise to deploy,
enabling developers to focus time and resources on end applications.
•USB to RS-232 converters
•USB to Dual RS-232 converters
•USB to RS-422/RS-285 converters
•Upgrade of legacy RS-232 devices
•PDA USB interface cable
•Cellular phone USB interface cable
•Barcode readers in Point-of-Sale terminals
USB-TO-UART BRIDGE BLOCK DIAGRAM
•Portable medical equipment
•PC peripherals
VBUS
D+
D–
Voltage
Regulator
48 MHz
Oscillator
USB
Transceiver
USB
Function
Controller
www.silabs.com/usb
•Industrial connectivity (CP2112)
(Some Devices)
TX
Buffer
UART
RX
Buffer
UART
EEPROM
or EPROM
•Barcode readers in Point-of-Sale terminals
I/O
Control
(CP2105 Only)
UART
I/F
(Modem)
EASY USB TO UART BRIDGE COMMUNICATION
Download the white paper
“USB Simplified”:
www.silabs.com/usb
I N T E R FAC E SOLUTIONS
USB Bridge Solutions
www.silabs.com/usb
Development Tools and Turnkey Support from Silicon Labs
Silicon Labs offers several single-chip connectivity bridge solutions to support USB to serial protocols as well as
specialized bridges for human interface device (HID) class applications. Complete tools are provided to help designers
throughout the entire project enabling USB connectivity to be easily added to any MCU in our portfolio. These solutions
offer hardware and software platforms to easily set up and configure, compile and debug a project. Full documentation and a
broad range of third-party compilers and development tools are available.
•
Easily implement USB in your designs
•
Pre-programmed with all the necessary USB software
•
No need to be familiar with the USB specification
•
Seamless compatibility with most operating systems
•
Evaluation kits available to support your design
CP2104-EK
CP2105-EK
CP2110-EB
C P2112-EK
USB Bridges: www.silabs.com/usb
PART NUMBER
DESCRIPTION
EEPROM
(BYTES)
RAM (BYTES)
DIGITAL PORT
I/O PINS
SERIAL BUSES
INTERNAL TEMP. RANGE
OSC
CP2104
UART to USB Bridge
1024
1152
4
UART, USB 2.0
•
CP2105
UART to Dual USB Bridge
296
608
5
UART, USB 2.0
CP2110
HID USB to UART Bridge
343
960
10
CP2112
USB to SMBus Bridge
194
512
8
OTHER
PACKAGE
EVAL KIT
–40 to 85 ºC
Volt Reg, RS-485, Split V DDIO
QFN24
CP2104EK
•
–40 to 85 ºC
Volt Reg, RS-485, Split V DDIO
QFN24
CP2105EK
UART, USB 2.0
•
–40 to 85 ºC
Volt Reg, RS-485, Split V DDIO
QFN24
CP2110EK
USB 2.0, SMBus
•
–40 to 85 ºC
Volt Reg
QFN24
CP2112EK
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