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PDF CP2101 Data sheet ( Hoja de datos )
| Número de pieza | CP2101 | |
| Descripción | Single-Chip USB to UART Bridge | |
| Fabricantes | ETC | |
| Logotipo |  |
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Preliminary
CP2101
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 512-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: 3.3V Output
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: 8
• Stop Bits: 1, 2
• Parity: Odd, Even, No Parity
- Baud Rates: 300bps to 921.6kbps
- 512 Byte Receive Buffer; 512 Byte Transmit Buffer
- Hardware or X-On / X-Off Handshaking Supported
- Event Character and Line Break Condition Support
VIRTUAL COM PORT DEVICE DRIVERS
- Works with Existing COM Port PC Applications
- Royalty-Free Distribution License
- Windows 98/Me/2000/XP
- MAC OS-9
- MAC OS-X
- Windows CE *
- Linux 2.40 and greater *
* (Contact factory for availability)
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: 3.0V to 3.6V
- USB Bus Powered: 4.0V to 5.25V
PACKAGE
- 28-pin MLP (5mm X 5mm)
TEMPERATURE RANGE: -40°C TO +85°C
Example Circuit Diagram
7 REGIN
C2
1uF
C1
4.7uF
TANT
6 VDD
3 GND
USB
CONNECTOR
VBUS 1
D- 2
D+ 3
GND 4
C3
0.1uF
8 VBUS
5 D-
4 D+
IN
Voltage
Regulator
OUT
CP2101
3.3V
48MHz
Oscillator
USB
Transceiver
USB Function
Controller
512B
EEPROM
512B
Xmit
Buffer
512B
Rcv
Buffer
UART
/RST
9
SUSPEND 12
/SUSPEND 11
(to external circuitry
for USB suspend
states)
RI
DCD
DTR
DSR
TXD
RXD
RTS
CTS
2
1
28
27
26
25
24
23
External RS-232
transceiver or
UART circuitry
DS014-1.0 AUG03
CYGNAL Integrated Products, Inc. © 2003
Page 1
1 page  
Preliminary
CP2101
1. SYSTEM OVERVIEW
The CP2101 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS232
designs to USB using a minimum of components and PCB space. The CP2101 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 5mm X 5mm 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 Cygnal allow a CP2101-based product to appear as
a COM port to PC applications. The CP2101 UART interface implements all RS232 signals, including control and
handshaking signals, so existing system firmware does not need to be modified. In many existing RS232 designs, all
that is required to update the design from RS232 to USB is to replace the RS232 level-translator with the CP2101.
An evaluation kit for the CP2101 (Part Number: CP2101EK) is available. It includes a CP2101-based USB-to-
UART/RS232 evaluation board, a complete set of VCP device drivers, USB and RS232 cables and full
documentation. Contact any of Cygnal's sales representatives or go to www.cygnal.com to order the CP2101
Evaluation Kit.
2. ABSOLUTE MAXIMUM RATINGS
Table 2.1. 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 4.2 V
Maximum Total current through VDD and GND
500 mA
Maximum output current sunk by /RST or any
I/O pin
100 mA
*Note: stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the devices at those or any other conditions above those indi-
cated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
© 2003 Cygnal Integrated Products, Inc. DS014-1.0 AUG03
Page 5
5 Page 
Preliminary
CP2101
5. USB FUNCTION CONTROLLER AND TRANSCEIVER
The Universal Serial Bus function controller in the CP2101 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.
The USB Suspend and Resume signals are supported for power management of both the CP2101 device as well as
external circuitry. The CP2101 will enter Suspend mode when Suspend signaling is detected on the bus. On entering
Suspend mode, the CP2101 asserts the SUSPEND and /SUSPEND signals. SUSPEND and /SUSPEND are also
asserted after a CP2101 reset until device configuration during USB Enumeration is complete
The CP2101 exits the Suspend mode when any of the following occur: (1) Resume signaling is detected or generated,
(2) a USB Reset signal is detected, or (3) a device reset occurs. On exit of Suspend mode, the SUSPEND and /SUS-
PEND signals are de-asserted. Note: both SUSPEND and /SUSPEND temporarily float high during a CP2101 reset. If
this behavior is undesirable, a strong pull-down (10K ohms) can be used to ensure /SUSPEND remains low during reset.
6. ASYNCHRONOUS SERIAL DATA BUS (UART) INTERFACE
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 pro-
grammed 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.
Table 6.1. Data Formats and Baud Rates
Data Bits
Stop Bits
Parity Type
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
© 2003 Cygnal Integrated Products, Inc. DS014-1.0 AUG03
Page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CP2101.PDF ] | |
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