CP2108-B03-GM

CP2108 Data Sheet The CP2108 is a highly integrated USB to Quad 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 CP2108 includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, and four asynchronous serial data buses (UART) with full modem control signals in a compact 9 mm x 9 mm 64-pin QFN package. The on-chip EEPROM may be used to customize the USB Vendor ID (VID), Product ID (PID), product description string, power descriptor, device release number, interface strings, device serial number, modem and GPIO configuration as desired for applications. All customization and configuration options can be selected using a simple GUI-based configurator. By eliminating the need for complex firmware and driver development, the CP2108 devices enable quick USB connectivity with minimal development effort. KEY FEATURES • No firmware development required • Simple GUI-based configurator • Integrated USB transceiver; no external resistors required • Integrated clock; no external crystal required • USB 2.0 full-speed compatible • Four independent UART interfaces • 16 GPIOs with configurable options • Royalty free Virtual COM port (VCP) drivers CP2108 is ideal for a wide range of applications, including the following: • Servers • Instrumentation • Point-of-Sale products • Industrial control CP2108 Connect to VBUS or External Supply VREGIN VDD Voltage Regulator 80 MHz Oscillator Baud Rate Generator RI(0-3) Clock Divider DCD(0-3) DTR(0-3) VSS USB Connector VBUS USB Interface Handshake Control VBUS D+ D+ D- D- Full-Speed 12 Mbps Transceiver Peripheral Function Controller Data FIFO RTS(0-3) UART1 RX(0-3) UARTn (0-3) VIO TX(0-3) UART2 GPIO.0 – GPIO.15 18 /RESET (2.7 to 6.0 V) DSR(0-3) CTS(0-3) GND (3.0 V to VDD) 6 UART0 VIO VIOHD EEPROM (Product Customization) SUSPEND /SUSPEND UART3 I/O Power and Logic Levels UART0-2, GPIO, SUSPEND, RESET High Drive UART 3(Pins 1-6) silabs.com | Building a more connected world. Rev. 1.2 CP2108 Data Sheet Feature List and Ordering Information 1. Feature List and Ordering Information CP 2108 – B 03 – G M R Tape and Reel (Optional) Package Type — QFN64 Temperature Grade — –40 to +85 °C (G) Firmware Revision Hardware Revision Interface Family, USB-to-Quad-UART Bridge Silicon Labs Xpress Product Line Figure 1.1. CP2108 Part Numbering The CP2108 devices have the following features: • Single-Chip USB-to-QUAD UART Data Transfer • Four independent UART interfaces • Integrated USB transceiver; no external resistor required • Integrated clock; no external crystal required • Integrated programmable EEPROM for storing customizable product information • On-chip power-on reset circuit • On-chip voltage regulator: 3.3 V output • USB Peripheral Function Controller • USB Specification 2.0 compliant; full-speed (12 Mbps) • USB suspend states supported via SUSPEND pins • Virtual COM Port Drivers • Works with existing COM port PC applications • Royalty-free distribution license • Supported on Windows, Mac, and Linux • Supply Voltage • Self-powered: 3.0 to 3.6 V • USB bus powered: 4.0 to 5.5 V • VIO voltage: 3.0 to VDD • VIOHD voltage: 2.7 to 6 V silabs.com | Building a more connected world. • UART Interface Features • Each UART interface supports the following: • Supports hardware flow control (RTS/CTS) • Supports all modem control signals • Data formats supported: • Data bits: 5, 6, 7, and 8 • Stop bits: 1, 1.5, and 2 • Parity: odd, even, set, mark and none • Baud rates: 300 bps to 2 Mbps • UART 3 (pins 1–6) supports interfacing to devices up to 6 V • GPIO Interface Features • Total of 16 GPIO pins with configurable options • Suspend pin support • Usable as inputs, open-drain or push-pull outputs • 4 configurable clock outputs for external devices • RS-485 bus transceiver control • Toggle LED upon transmission • Toggle LED upon reception • Package Options • RoHS-UART 3 compliant 64-pin QFN (9x9 mm) • Temperature Range • –40 to +85 °C • Ordering Part Number • CP2108-B03-GM Rev. 1.2 | 2 Table of Contents 1. Feature List and Ordering Information . . . . . . . . . . . . . . . . . . . . . . 2 2. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 Electrical Characteristics . . . . . . . . . . . . . 3.1.1 Recommended Operating Conditions . . . . . . . 3.1.2 UART, GPIO, and Suspend I/O Electrical Characteristics 3.1.3 GPIO . . . . . . . . . . . . . . . . . . 3.1.4 Reset Electrical Characteristics . . . . . . . . . 3.1.5 Voltage Regulator . . . . . . . . . . . . . 3.1.6 USB Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . .10 3.3 Thermal Conditions . . . . . . . . . . . . . . . . . . . . . . . . . .11 3.4 Throughput and Flow Control. . . . . . . . . . . . . . . . . . . . . . . . .11 . . 6 6 7 7 8 8 9 4. Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5. QFN64 Package Specifications. . . . . . . . . . . . . . . . . . . . . . . . 16 5.1 QFN64 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . .16 5.2 QFN64 PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . .18 5.3 QFN64 Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . .19 6. Typical Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 20 7. USB Function Controller and Transceiver . . . . . . . . . . . . . . . . . . .23 8. Asynchronous Serial Data Bus (UART) Interfaces 8.1 Baud Rate Generation . 9. GPIO and UART Pins . . . . . . . . . . . . . . . . . . . . . . . . .24 . . . . . . . . . . . . . . . . .24 . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 9.1 GPIO — Alternate Clock Outputs . . . . . . . . . . . . . . . . . . . . . . .25 9.2 GPIO — Transmit and Receive Toggle . . . . . . . . . . . . . . . . . . . . .26 9.3 RS-485 Transceiver Bus Control . . . . . . . . . . . . . . . . . . . . .27 9.4 Hardware Flow Control (RTS and CTS) . . . . . . . . . . . . . . . . . . . . .28 9.5 High Drive Pins UART 3 Pins 1–6 . . . . . . . . . . . . . . . . . . . . .29 10. Internal EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 11. CP2108 Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . 32 11.1 Virtual COM Port (VCP) Drivers . . . . . . . . . . . . . . . . . . . . . . .32 11.2 Driver Customization . . . . . . . . . . . . . . . . . . . . . . . . . . .32 11.3 Driver Certification . . . . . . . . . . . . . . . . . . . . . . . . . . .32 . 12. Relevant Application Notes and Software . . . . . . . . . . . . . . . . . . . 33 13. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . silabs.com | Building a more connected world. 34 Rev. 1.2 | 3 13.1 Revision 1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 13.2 Revision 1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 13.3 Revision 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 13.4 Revision 0.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 silabs.com | Building a more connected world. Rev. 1.2 | 4 CP2108 Data Sheet System Overview 2. System Overview The CP2108 is a highly integrated USB-to-Quad-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 CP2108 includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, and four asynchronous serial data buses (UART) with full modem control signals in a compact 9 x 9 mm QFN-64 package (sometimes called “MLF” or “MLP”). The on-chip EEPROM may be used to customize the USB Vendor ID (VID), Product ID (PID), Product Description String, Power Descriptor, Device Release Number, Interface Strings, Device Serial Number, Modem, and GPIO configuration 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 Labs allow a CP2108-based product to appear as four COM ports in PC applications. The CP2108 UART interfaces implement all RS-232/RS-485 signals including control and handshaking, so existing system firmware does not need to be modified. The device also features a total of sixteen GPIO signals that can be user-defined for status and control information. See www.silabs.com/appnotes for the latest application notes and product support information for the CP2108. An evaluation kit for the CP2108 is available. It includes a CP2108-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 representative or go to www.silabs.com/products/interface/Pages/CP2108EK.aspx to order the CP2108 Evaluation Kit. silabs.com | Building a more connected world. Rev. 1.2 | 5 CP2108 Data Sheet Electrical Specifications 3. Electrical Specifications 3.1 Electrical Characteristics All electrical parameters in all tables are specified under the conditions listed in 3.1.1 Recommended Operating Conditions, unless stated otherwise. 3.1.1 Recommended Operating Conditions VDD= 3.0 to 3.6 V, –40 to +85 °C unless otherwise specified. Table 3.1. Recommended Operating Conditions1 Parameter Symbol Test Condition Min Typ Max Unit Operating Supply Voltage VDD VDD 3.0 — 3.6 V Operating Supply Voltage VREGIN2 VREGIN 4.0 — 5.5 V Operating Supply Voltage VIO VIO 3.0 — VDD V Operating Supply Voltage VIOHD VIOHD 2.7 — 6.0 V Supply Current—Normal 3 IDD — 56 — mA Supply Current—Suspended 3 IDD Bus Powered — 460 — µA Self Powered — 330 — µA Supply Current - USB Pull-up 4 IPU — 200 228 µA Operating Ambient Temperature TA -40 — 85 °C Operating Junction Temperature TJ -40 — 105 °C Note: 1. All voltages are with respect to VSS. 2. This applies only when using the regulator. When not using the regulator, VREGIN and VDD are tied together externally and it is allowable for VREGIN to be equal to VDD. 3. If the device is connected to the USB bus, the USB pull-up current should be added to the supply current to calculate total required current. 4. The USB pull-up supply current values are calculated values based on USB specifications. silabs.com | Building a more connected world. Rev. 1.2 | 6 CP2108 Data Sheet Electrical Specifications 3.1.2 UART, GPIO, and Suspend I/O Electrical Characteristics VDD= 3.0 to 3.6 V, VIO=1.8 V to VDD, VIOHD = 2.7 V to 6.0 V, –40 to +85 °C unless otherwise specified. Table 3.2. UART, GPIO, and Suspend I/O Parameter Output High Voltage Symbol Test Condition Min Typ Max Unit VOH VIO – 0.7 — — V VOH VIOHD – 0.7 — — V — — 0.6 V — — 0.6 V VIO – 0.6 — — V — — 0.6 V (All pins except High Drive UART 3 pins 1–6) Output High Voltage (High Drive UART 3 pins 1–6) Output Low Voltage VOL (All pins except High Drive pins 1– 6) Output Low Voltage Low Drive IOL = 3 mA VOL (High Drive pins 1–6) High Drive IOL = 12.5 mA Input High Voltage VIH 3.0 ≤ VIO ≤ 3.6 Input Low Voltage VIL Weak Pull-up Current IPU VIO = 3.6 V -30 -20 -10 µA IPU VIOHD = 2.7 V -15 -10 -5 µA VIOHD = 6.0 V -30 -20 -10 µA Min Typ Max Unit (VIN = 0 V) Weak Pull-up Current UART 3 (pins 1–6) 3.1.3 GPIO –40 to +85°C unless otherwise specified. Table 3.3. GPIO Output Specifications Parameter Symbol Test Condition RS-485 Active Time After Stop Bit tACTIVE — 1 — bit time1 TX Toggle Rate fTXTOG — 15 — Hz RX Toggle Rate fRXTOG — 15 — Hz Clock Output Rate fCLOCK ~158k — 20M Hz Note: 1. Bit-time is calculated as 1 / baud rate. silabs.com | Building a more connected world. Rev. 1.2 | 7 CP2108 Data Sheet Electrical Specifications 3.1.4 Reset Electrical Characteristics –40 to +85 °C unless otherwise specified. Table 3.4. Reset Parameter Power-On Reset (POR) Threshold Symbol Test Condition Min Typ Max Unit VPOR Rising Voltage on VDD — 1.4 — V Falling Voltage on VDD 0.8 1 1.3 V 10 — 3000 µs VIO – 0.6 — — V VDD Ramp Time tRMP Time to VDD≥ 3.0 V /RESET Input High Voltage VIHRESET 3.0 ≤ VIO ≤ 3.6 /RESET Input Low Voltage VILRESET — — 0.6 V /RESET Low Time to Generate a System Reset tRSTL 50 — — ns Min Typ Max Unit 3.1.5 Voltage Regulator –40 to +85 °C unless otherwise specified. Table 3.5. Voltage Regulator Parameter Symbol Test Condition Output Voltage (at VDD pin) VDDOUT 3.15 3.3 3.4 V Output Current (at VDD pin)1 IDDOUT — — 150 mA Output Load Regulation VDDLR — 0.1 1 mV/mA Output Capacitance CVDD 1 — 10 µF Note: 1. This is the total current the voltage regulator is capable of providing. Any current consumed by the CP2108 reduces the current available to external devices powered from VDD. silabs.com | Building a more connected world. Rev. 1.2 | 8 CP2108 Data Sheet Electrical Specifications 3.1.6 USB Transceiver –40 to +85 °C unless otherwise specified. Table 3.6. USB Transceiver Parameter Valid Supply Range Symbol Test Condition VDD Min Typ Max Unit 3.0 — 3.6 V (for USB Compliance) VBUS Pull-Down Leakage Current IVBUSL VBUS = 5 V, VIO = 3.3 V — 10 — µA VBUS Detection Input Threshold VVBUSTH 3.0 ≤ VIO ≤ 3.6 VIO – 0.6 — — V Transmitter Output High Voltage VOH 2.8 — — V Output Low Voltage VOL — — 0.8 V Output Crossover Point VCRS 1.3 — 2.0 V Output Impedance ZDRV Driving High — 38 — Ω Driving Low — 38 — Ω 1.425 1.5 1.575 kΩ Low Speed 75 — 300 ns Full Speed 4 — 20 ns Low Speed 75 — 300 ns Full Speed 4 — 20 ns 0.2 — — V 0.8 — 2.5 V —