CP2103 S INGLE - C HIP USB TO UART B RIDGE Single-Chip USB to UART Data Transfer Integrated Virtual COM Port Device Drivers USB transceiver; no external resistors Works required Integrated clock; no external crystal required Integrated 1024-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: 3.3 V output Windows Mac USB USBXpress™ Direct Driver Support Royalty-Free Distribution License 7/Vista/XP/Server 2003/2000 Windows CE 6.0, 5.0, and 4.2 Example Applications Upgrade of RS-232 legacy devices to USB of RS-485 legacy devices to USB Cellular phone USB interface cable PDA USB interface cable USB to RS-232 serial adapter Asynchronous Serial Data BUS (UART) Upgrade All handshaking and modem interface signals formats supported: - Data bits: 5, 6, 7, and 8 - Stop bits: 1, 1.5, and 2 - Parity: odd, even, mark, space, no parity Baud rates: 300 bps to 1 Mbps 576 Byte receive buffer; 640 byte transmit buffer Hardware or X-On/X-Off handshaking supported Four GPIO signals for status and control Configurable I/O (1.8 V to VDD) using VIO pin Data RS-485 OS-X Windows Specification 2.0 compliant; full-speed (12 Mbps) suspend states supported via SUSPEND pins Configurable ® 7®/Vista®/XP®/Server 2003®/2000® Linux USB Function Controller USB with Existing COM Port PC Applications Distribution License Royalty-Free Supply Voltage Self-powered: 3.0 to 3.6 V bus powered: 4.0 to 5.25 V I/O voltage: 1.8 V to VDD USB Package I/O (VDD to 5 V) using external pull-up Lead mode with bus transceiver control free 28-pin QFN (5x5 mm) Ordering Part Number CP2103-GM Temperature Range: –40 to +85 °C CP2103 5 External voltage supply or direct connection to VDD GPIO_0 VIO GPIO_1 GPIO_2 4 7 REGIN IN GPIO_3 Voltage Regulator RST OUT 6 2 8 USB CONNECTOR VBUS DD+ GND 1 VDD SUSPEND GND VBUS RI 48 MHz Oscillator DCD DTR DSR 4 2 3 SUSPEND 3.3 V 3 DD+ USB Transceiver USB Function Controller 4 5 6 1024B EEPROM UART 640B 576B TX RX Buffer Buffer TXD RXD RTS CTS 19 18 17 (to external circuitry for status and control) 16 9 12 11 (to external circuitry for USB suspend states) 1 28 27 26 25 External RS-232 transceiver or UART circuitry 24 23 22 Figure 1. Example System Diagram Rev. 1.0 12/10 Copyright © 2010 by Silicon Laboratories CP2103 CP2103 2 Rev. 1.0 CP2103 TABLE O F C ONTENTS Section Page 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 3. Pinout and Package Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 4. USB Function Controller and Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5. Asynchronous Serial Data Bus (UART) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6. GPIO Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7. Internal EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8. CP2103 Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 8.1. Virtual COM Port Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8.2. USBXpress Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8.3. Driver Customization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 8.4. Driver Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 9. Voltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 10. Relevant Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Rev. 1.0 3 CP2103 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 5x5 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 four 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. Direct access driver support is available through the Silicon Laboratories USBXpress driver set. Go to 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-toUART/RS-232 evaluation board, a complete set of VCP device drivers, USB and RS-232 cables, and complete documentation. Contact a Silicon Labs sales representatives or visit www.silabs.com to order the CP2103 Evaluation Kit. 4 Rev. 1.0 CP2103 2. Electrical Specifications Table 1. Absolute Maximum Ratings Parameters 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 or VIO with respect to GND –0.3 — 4.2 V Maximum Total Current through VDD, VIO, and GND — — 500 mA Maximum Output Current sunk by RST or any I/O pin — — 100 mA Note: Stresses above those listed may cause permanent damage to the device. This is a stress rating only, and functional 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 = 3.0 to 3.6 V, –40 to +85 °C unless otherwise specified Parameters Min Typ Max Units Supply Voltage (VDD) 3.0 3.3 3.6 V Supply Voltage (VIO) 1.8 3.3 VDD V Normal Operation, VREG Enabled — 20 26 mA Suspended, VREG Enabled — 80 100 µA — 200 228 µA — 500 — µA –40 — +85 °C Supply Current1 Supply Current1 Conditions Supply Current - USB Pull-up2 VIO Supply Current VBUS = 0 VDD = 0 VIO = 3.0 V Specified Operating Temperature Range Notes: 1. If the device is connected to the USB bus, the USB Pull-up Current should be added to the supply current for total supply current. 2. The USB pull-up supply current values are calculated based on USB specifications. Rev. 1.0 5 CP2103 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 Parameters Conditions Min Typ Max Units IOH = –10 µA IOH = –3 mA IOH = –10 mA VIO – 0.1 VIO – 0.7 — — — VIO – 0.8 — — — V IOL = 8.5 mA IOL = 10 µA — — — — 0.6 0.1 V Input High Voltage (VIH) 2.0 — — V Input Low Voltage (VIL) — — 0.8 V Output High Voltage (VOH) Output Low Voltage (VOL) Input Leakage Current Weak pull-ups enabled Weak pull-ups disabled — — 25 — 50 ±1 µA Maximum Input Voltage Open drain, logic high (1) — — 5.8 V Table 4. UART and Suspend I/O DC Electrical Characteristics (Low-Voltage Operation) VIO = 1.8 V, VDD = 2.7 to 3.6 V, –40 to +85 °C unless otherwise specified Parameters Conditions Min Typ Max Units Output High Voltage (VOH) IOH = –10 µA IOH = –1 mA VIO – 0.1 VIO – 0.4 — — — — V Output Low Voltage (VOL) IOL = 10 µA IOL = 3 mA — — — — 0.1 0.4 V Input High Voltage (VIH) VIO x 0.7 — — V Input Low Voltage (VIL) — — VIO x 0.3 V Input Leakage Current Weak pull-ups enabled Weak pull-ups disabled — — — 6 ±1 15 µA Maximum Input Voltage Open drain, logic high (1) — — 5.8 V 6 Rev. 1.0 CP2103 Table 5. Reset Electrical Characteristics –40 to +85 °C unless otherwise specified Parameters Conditions Min Typ Max Units RST Input High Voltage 0.7 x VIO — — V RST Input Low Voltage — — 0.3 x VIO V Minimum RST Low Time to Generate a System Reset 15 — — µs Table 6. Voltage Regulator Electrical Specifications –40 to +85 °C unless otherwise specified Parameters Conditions Min Typ Max Units 4.0 — 5.25 V 3.0 3.3 3.6 V VBUS Detection Input Threshold 1.0 1.8 4.0 V Bias Current — 110 — µA Input Voltage Range Output Voltage Output Current = 1 to 100 mA* *Note: The maximum regulator supply current is 100 mA. Rev. 1.0 7 CP2103 3. Pinout and Package Definitions Table 7. CP2103 Pin Definitions Name Pin # Type VDD 6 Power In Description 3.0–3.6 V Power Supply Voltage Input. Power Out 3.3 V Voltage Regulator Output. See "9. Voltage Regulator" on page 16. VIO 5 GND 2 Power In 1.8 V to VDD I/O Supply Voltage Input. Ground. Must be tied to ground. SGND Ground. Must be tied to ground. RST 9 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 7 Power In 5 V Regulator Input. This pin is the input to the on-chip voltage regulator. VBUS 8 D In VBUS Sense Input. This pin should be connected to the VBUS signal of a USB network. A 5 V signal on this pin indicates a USB network connection. D+ 3 D I/O USB D+ D– 4 D I/O USB D– TXD 25 D Out Asynchronous data output (UART Transmit) RXD 24 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 DCD 28* D In Data Carrier Detect control input (active low) RI 1* 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 GPIO.3 16 D I/O User-configurable input or output. GPIO.2 17 D I/O User-configurable input or output. GPIO.1 18 D I/O User-configurable input or output. GPIO.0 19 D I/O User-configurable input or output. Data Terminal Ready control output (active low) These pins should be left unconnected or tied to VDD. *Note: Pins can be left unconnected when not used. 8 Rev. 1.0 DCD DTR DSR TXD RXD RTS CTS 27 26 25 24 23 22 SGND 28 CP2103 RI 1 21 NC GND 2 20 NC D+ 3 19 GPIO.0 D- 4 18 GPIO.1 VIO 5 17 GPIO.2 VDD 6 16 GPIO.3 REGIN 7 15 NC CP2103 Top View 8 9 10 11 12 13 14 VBUS RST NC SUSPEND SUSPEND NC NC SGND Figure 2. QFN-28 Pinout Diagram (Top View) Rev. 1.0 9 CP2103 Figure 3. QFN-28 Package Drawing Table 8. QFN-28 Package Dimensions Dimension Min Nom Max Dimension Min Nom Max A A1 A3 0.80 0.03 0.90 0.07 0.25 REF 1.00 0.11 E2 L aaa 2.90 0.45 3.15 0.55 0.15 3.35 0.65 b D 0.18 0.25 5.00 BSC. 0.30 bbb ddd 0.10 0.05 D2 e 2.90 3.15 0.50 BSC. 3.35 eee Z 0.08 0.435 Y 0.18 E 5.00 BSC. Notes: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and tolerancing per ANSI Y14.5M-1994. 3. This drawing conforms to JEDEC outline MO-243, variation VHHD except for custom features D2, E2, L, Z, and Y which are toleranced per supplier designation. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for small body components. 10 Rev. 1.0 CP2103 Figure 4. Typical QFN-28 Land Pattern Rev. 1.0 11 CP2103 Figure 5. Typical QFN-28 Solder Paste Diagram 12 Rev. 1.0 CP2103 4. USB Function Controller and Transceiver The universal serial bus function controller in the CP2103 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 CP2103 device as well as external circuitry. The CP2103 will enter Suspend mode when Suspend signaling is detected on the bus. Upon entering Suspend mode, the CP2103 asserts the SUSPEND and SUSPEND signals. SUSPEND and SUSPEND are also asserted after a CP2103 reset until device configuration during USB Enumeration is complete. The CP2103 exits the Suspend mode when any of the following events occurs: (1) Resume signaling is detected or generated, (2) a USB Reset signal is detected, or (3) a device reset occurs. Upon exit from Suspend mode, the SUSPEND and SUSPEND signals are de-asserted. Both SUSPEND and SUSPEND temporarily float high during a CP2103 reset. If this behavior is undesirable, a strong pulldown (10 k) can be used to ensure SUSPEND remains low during reset. See Figure 6 for other recommended options. I/O Voltage 5 CP2103 V IO 1 F VDD R1 4.7 k 7 RST SUSPEND 6 C4 4.7 F C2 0.1 F 2 Option 1 REGIN C1 1 F VDD SUSPEND GND RI 9 (to external circuitry for USB suspend states) 12 11 R2 10 k 1 Option 4 Option 2 8 USB CONNECTOR VBUS DD+ GND DCD VBUS DTR DSR 1 2 4 3 3 4 5 6 D1 D2 D- TXD D+ RXD RTS D3 Option 3 CTS GPIO.0 GPIO.1 GPIO.2 GPIO.3 Option Option Option Option Option 1: 2: 3: 3: 4: 28 27 26 External RS-232 transceiver or UART circuitry 25 24 23 22 19 18 17 External Application Circuitry 16 A 4.7 k pull-up resistor can be added to increase noise immunity. A 4.7 µF capacitor can be added if powering other devices from the on-chip regulator. Avalanche transient voltage suppression diodes should be added for ESD protection . Use Littlefuse p/n SP0503BAHT or equivalent. 10 k resistor to ground to hold SUSPEND low on initial power on or device reset. Figure 6. Typical Connection Diagram Rev. 1.0 13 CP2103 5. Asynchronous Serial Data Bus (UART) Interface The CP2103 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 can be programmed to support a variety of data formats and baud rates. If the Virtual COM Port drivers are used, the data format and baud rate are set during COM port configuration on the PC. If the USBXpress drivers are used, the CP2103 is configured through the USBXpress API. The available data formats and baud rates are listed in Table 9. Table 9. Data Formats and Baud Rates Data Bits 5, 6, 7, and 8 Stop Bits 1, 1.51, and 2 Parity Type 2 Baud Rates None, Even, Odd, Mark, Space 300, 600, 1200, 1800, 2400, 4000, 4800, 7200, 9600, 14400, 16000, 19200, 28800, 38400, 51200, 56000, 57600, 64000, 76800, 115200, 128000, 153600, 230400, 250000, 256000, 460800, 500000, 576000, 9216003 Notes: 1. 5-bit only. 2. Additional baud rates are supported. See “AN205: CP210x Baud Rate Support”. 3. 7 or 8 data bits only. 6. GPIO Pins The CP2103 supports four user-configurable GPIO pins for status and control information. More information regarding the configuration and use of these pins can be found in “AN144: CP21xx Device Customization Guide” and “AN223: Port Configuration and GPIO for CP210x” available at www.silabs.com. 7. Internal EEPROM The CP2103 includes an internal EEPROM that may be used to customize the USB Vendor ID (VID), Product ID (PID), Product Description String, Power Descriptor, Device Release Number, and Device Serial Number as desired for OEM applications. If the EEPROM is not programmed with OEM data, the default configuration data shown in Table 10 is used. While customization of the USB configuration data is optional, it is recommended to customize the VID/PID combination. A unique VID/PID combination prevents the driver from conflicting with any other USB driver. A vendor ID can be obtained from www.usb.org, or Silicon Labs can provide a free PID for the OEM product that can be used with the Silicon Laboratories VID. It is also recommended to customize the serial number if the OEM application is one in which it is possible for multiple CP2103-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 CP2103 on-board during the manufacturing and testing process. A stand-alone utility for programming the internal EEPROM is available from Silicon Labs. A library of routines provided in the form of a Windows® DLL is also available. This library can be used to integrate the 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. USB descriptors can be locked to prevent future modification. 14 Rev. 1.0 CP2103 Table 10. Default USB Configuration Data Name Value Vendor ID 10C4h Product ID EA60h Power Descriptor (Attributes) 80h Power Descriptor (Max. Power) 32h Release Number 0100h Serial Number 0001 (63 characters maximum) Product Description String “CP2103 USB to UART Bridge Controller” (126 characters maximum) 8. CP2103 Device Drivers There are two sets of device drivers available for the CP2103 devices: the Virtual COM Port (VCP) drivers and the USBXpress Direct Access drivers. Only one set of drivers is necessary to interface with the device. The latest drivers are available at http://www.silabs.com/products/microcontroller/downloads.asp. 8.1. Virtual COM Port Drivers The CP2103 Virtual COM Port (VCP) device drivers allow a CP2103-based device to appear to the PC's application software as a COM port. Application software running on the PC accesses the CP2103-based device as it would access a standard hardware COM port. However, actual data transfer between the PC and the CP2103 device is performed over the USB interface. Therefore, existing COM port applications may be used to transfer data via the USB to the CP2103-based device without modifying the application. See “AN197: Serial Communications Guide for the CP210x” for example code for interfacing to a CP2103 using the Virtual COM drivers. 8.2. USBXpress Drivers The Silicon Laboratories USBXpress drivers provide an alternate solution for interfacing with CP2103 devices. No serial port protocol expertise is required. Instead, a simple, high-level application program interface (API) is used to provide simpler CP201x connectivity and functionality. The USBXpress for CP210x Development Kit includes Windows device drivers, Windows device driver installers and uninstallers, and a host interface function library (host API) provided in the form of a Windows Dynamic Link Library (DLL). The USBXpress driver set is recommended for new products that also include new PC software. The USBXpress interface is described in “AN169: USBXpress® Programmer's Guide.” 8.3. Driver Customization In addition to customizing the device as described in “7. Internal EEPROM” , the drivers and the drivers installation package can be also be customized. See “AN220: USB Driver Customization” for more information on generating customized VCP and USBXpress drivers. 8.4. Driver Certification The default drivers that are shipped with the CP2103 are Microsoft WHQL (Windows Hardware Quality Labs) certified. The certification means that the drivers have been tested by Microsoft, and their latest operating systems (XP and Vista) allow the drivers to be installed without any warnings or errors. The customized drivers generated using the AN220 software are not automatically certified. They must go first through the Microsoft Driver Reseller Submission process. Contact Silicon Laboratories support for assistance with this process. Rev. 1.0 15 CP2103 9. Voltage Regulator The CP2103 includes an on-chip 5 to 3 V voltage regulator. This allows the CP2103 to be configured as either a USB bus-powered device or a USB self-powered device. These configurations are shown in Figures 7 and 8. When enabled, the 3 V voltage regulator output appears on the VDD pin and can be used to power external 3 V devices. See Table 11 for the voltage regulator electrical characteristics. Alternatively, if 3 V power is supplied to the VDD pin, the CP2103 can function as a USB self-powered device with the voltage regulator disabled. For this configuration, it is recommended that the REGIN input be tied to the 3 V net to disable the voltage regulator. This configuration is shown in Figure 9. The USB max power and power attributes descriptor must match the device power usage and configuration. See “AN144: CP21xx Device Customization Guide” for information on how to customize USB descriptors for the CP2103. Note: It is recommended that additional decoupling capacitance (e.g., 0.1 µF in parallel with 1.0 µF) be provided on the REGIN input. Table 11. Voltage Regulator Electrical Specifications –40 to +85 °C unless otherwise specified. Parameter Conditions Min Typ Max Units 4.0 — 5.25 V 3.0 3.3 3.6 V VBUS Detection Input Threshold 1.0 1.8 4.0 V Bias Current — 110 — µA Input Voltage Range Output Voltage Output Current = 1 to 100 mA* *Note: The maximum regulator supply current is 100 mA. CP2103 VBUS VBUS Sense From VBUS REGIN 5 V In Voltage Regulator (REG0) 3 V Out To 3 V Power Net V DD Device Power Net Figure 7. Configuration 1: USB Bus-Powered 16 Rev. 1.0 CP2103 CP2103 From VBUS VBUS VBUS Sense From 5 V Power Net REGIN 5 V In Voltage Regulator (REG0) 3 V Out To 3V Power Net VDD Device Power Net Figure 8. Configuration 2: USB Self-Powered CP2103 From VBUS VBUS VBUS Sense REGIN 5 V In Voltage Regulator (REG0) 3 V Out From 3 V Power Net VDD Device Power Net Figure 9. Configuration 3: USB Self-Powered, Regulator Bypassed Rev. 1.0 17 CP2103 10. Relevant Application Notes The following application notes are applicable to the CP2103. The latest versions of these application notes and their accompanying software are available at: http://www.silabs.com/products/mcu/Pages/ApplicationNotes.aspx. AN144: CP21xx Device Customization Guide This application note describes how to use the AN144 software to configure the USB parameters on the CP2103 devices. AN169: USBXpress® Programmer's Guide This application note describes the USBXpress API interface and includes example code. AN197: Serial Communications Guide for the CP210x This application note describes how to use the standard Windows COM port function to communicate with the CP2103 and includes example code. AN205: CP210x Baud Rate Support This application note describes how to use the AN205 software to configure the baud rate aliasing feature on the CP2103 devices. AN220: USB Driver Customization This application note describes how to use the AN220 software to customize the VCP or USBXpress drivers with OEM information. AN223: Port Configuration And GPIO for CP210x This application note describes how to use the AN223 software to configure the GPIO’s other configurable pins. 18 Rev. 1.0 CP2103 DOCUMENT CHANGE LIST Revision 0.1 to Revision 0.2 Updated “Linux 2.40” bullet on page 1. Revision 0.2 to Revision 0.3 Added additional supported operating systems on page 1. Changed VDD conditions of Tables 2 and 3 from a minimum of 2.7 to 3.0 V. Updated typical and max Supply current numbers in Table 2. Updated package drawings in Figures 3, 4, and 5. Removed tantalum requirement in Figure 6. Consolidate Sections 9 and 10. Added Section "10. Relevant Application Notes" on page 18. Revision 0.3 to Revision 0.4 Added voltage numbers to Table 4 on page 6. Corrected notes numbering in Table 8 on page 10. Revision 0.4 to Revision 1.0 Updated supported operating systems on page 1. Updated notes in Table 2. Updated AN144 title throughout document. Rev. 1.0 19 CP2103 CONTACT INFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. 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 features 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 intended 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. 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 20 Rev. 1.0