CP2103 ETC1 | Alldatasheet
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Technical content
This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Figure 1. Example System Diagram
48 MHz
Preliminary Rev. 0.2
Preliminary Rev. 0.2 TABLE OF CONTENTS Section Page
Preliminary Rev. 0.2 1. System Overview The CP2103 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS-232/RS-485 designs to USB using a minimum of components and PCB space. The CP2103 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 QFN-28 package (sometimes called “MLF” or “MLP”). 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 CP2103-based product to appear as a COM port to PC applications. The CP2103 UART interface implements all RS-232/RS-485 signals, including control and handshaking signals, so existing system firmware does not need to be modified. The device also features up to (4) GPIO signals that can be user-defined for status and control information. Support for I/O interface voltages down to 1.8 V is provided via a VIO pin. 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 CP2103. See www.silabs.com for the latest application notes and product support information for CP2103. An evaluation kit for the CP2103 (Part Number: CP2103EK) is available. It includes a CP2103-based USB-to- UART/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 CP2103 Evaluation Kit.
- Global DC Electrical Characteristics
Table 1. Absolute Maximum Ratings 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. Table 2. Global DC Electrical Characteristics VDD = 2.7 to 3.6 V, –40 to +85 °C unless otherwise specified.
Table 3. UART and Suspend I/O DC Electrical Characteristics VIO = VDD = 2.7 to 3.6 V, –40 to +85 °C unless otherwise specified. Table 4. UART and Suspend I/O DC Electrical Characteristics (Low-Voltage Operation) VIO = 1.8 V to 2.7 V, –40 to +85 °C unless otherwise specified.
Preliminary Rev. 0.2 4. Pinout and Package Definitions Table 5. CP2103 Pin Definitions
Description
3.0–3.6 V Power Supply Voltage Input. 3.3 V Voltage Regulator Output. See Section 11. VIO Power In 1.8 V to VDD I/O Supply Voltage Input. GND Ground. Must be tied to ground. SGND Ground. Must be tied to ground. RST D I/O Device Reset. Open-drain output of internal POR or VDD monitor. An external source can initiate a system reset by driving this pin low for at least 15 µs. REGIN Power In 5 V Regulator Input. This pin is the input to the on-chip voltage regu- lator. VBUS D In VBUS Sense Input. This pin should be connected to the VBUS sig- nal of a USB network. A 5 V signal on this pin indicates a USB net- work connection. D I/O USB D+ D I/O USB D– TXD D Out Asynchronous data output (UART Transmit) RXD D In Asynchronous data input (UART Receive) CTS 22* D In Clear To Send control input (active low) RTS 23* D Out Ready to Send control output (active low) DSR 26* D in Data Set Ready control input (active low) DTR 27* D Out Data Terminal Ready control output (active low) DCD 28* D In Data Carrier Detect control input (active low) RI D In Ring Indicator control input (active low) SUSPEND 12* D Out This pin is driven high when the CP2103 enters the USB suspend state. SUSPEND 11* D Out This pin is driven low when the CP2103 enters the USB suspend state. NC 10, 13–15, 20–21 These pins should be left unconnected or tied to VDD. GPIO.3 D I/O User-configurable input or output. GPIO.2 D I/O User-configurable input or output. GPIO.1 D I/O User-configurable input or output. GPIO.0 D I/O User-configurable input or output. *Note: Pins can be left unconnected when not used.
Figure 2. QFN-28 Pinout Diagram (Top View)
Figure 3. QFN-28 Package Drawing Table 6. QFN-28 Package
Figure 4. Typical QFN-28 Landing Diagram
Figure 5. Typical QFN-28 Solder Paste Diagram
- USB Function Controller and Transceiver
commands for controlling the function of the UART. are also asserted after a CP2103 reset until device configuration during USB Enumeration is complete. SUSPEND and SUSPEND signals are de-asserted. Figure 6. Typical Connection Diagram Option 1: A 4.7 kΩ pull-up resistor can be added to increase noise immunity. Option 2: A 4.7 µF tantalum capacitor can be added if powering other devices from the on-chip regulator. Option 3: Avalanche transient voltage suppression diodes should be added for ESD protection. Option 3: Use Littlefuse p/n SP0503BAHT or equivalent. Option 4: 10 kΩ resistor to ground to hold SUSPEND low on initial power on or device reset.
- Asynchronous Serial Data Bus (UART) Interface
DSR, DTR, DCD, and RI control signals. The UART supports RTS/CTS, DSR/DTR, and X-On/X-Off handshaking. available are listed in Table 7. “AN223: Port Configuration and GPIO for CP210x” available on the Silicon Laboratories website. 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. USB descriptors can be locked to prevent future modification. Table 7. Data Formats and Baud Rates
- Additional baud rates are supported. See “AN205: CP210x Baud Rate Support”.
- Virtual Com Port Device Drivers
modifying the application. Contact Silicon Laboratories for the latest list of supported operating systems. order the CP2103 Evaluation Kit. The CP210x drivers and programming utilities are subject to change without notice. Update Registration" service is recommended.
- USBXpress™ Direct Driver Support
Library (DLL). The included device drivers and installation files support MS Windows 98SE/2000/XP. USB bus-powered device or a USB self-powered device. These configurations are shown in Figure 7 and Figure 8. devices. See Table 9 for the voltage regulator electrical characteristics. to disable the voltage regulator. This configuration is shown in Figure 9. Table 8. Default USB Configuration Data
Figure 7. Configuration 1: USB Bus-Powered Figure 8. Configuration 2: USB Self-Powered Table 9. Voltage Regulator Electrical Specifications –40 to +85 °C unless otherwise specified. *Note: The maximum regulator supply current is 100 mA.
5 V In
3 V Out
Figure 9. Configuration 3: USB Self-Powered, Regulator Bypassed
Preliminary Rev. 0.2 Document Change List Revision 0.1 to Revision 0.2 Updated “Linux 2.40” bullet on page 1.
Preliminary Rev. 0.2 CONTACT INFORMATION Silicon Laboratories Inc.
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Austin, TX 78735 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: MCUinfo@silabs.com Internet: www.silabs.com Silicon Laboratories, Silicon Labs, and USBXpress are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed fea- tures or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intend- ed to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.