Overview
The CP2103-GMR, produced by Silicon Labs, is a highly-integrated USB-to-UART Bridge Controller designed to provide a simple and efficient solution for upgrading legacy RS-232 and RS-485 designs to USB. This single-chip solution integrates a USB transceiver, clock, and 1024-byte EEPROM, eliminating the need for external components. It supports USB Specification 2.0 at full-speed (12 Mbps) and includes a built-in voltage regulator and power-on reset circuit. The CP2103-GMR is packaged in a compact 28-pin QFN (5x5 mm) package, making it ideal for space-constrained applications.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | QFN28 |
| Package Size | 5x5 mm |
| Supply Voltage | Self-powered: 3.0 to 3.6 V, USB bus powered: 4.0 to 5.25 V |
| I/O Voltage | 1.8 V to VDD |
| UART Interface | 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 |
| Buffer Size | Receive buffer: 576 bytes, Transmit buffer: 640 bytes |
| GPIO Signals | Four user-defined GPIO signals |
| Operating Temperature | -40°C to 85°C |
Key Features
- Integrated USB transceiver and clock, no external resistors or crystal required
- Integrated 1024-byte EEPROM for customizing USB descriptors and serial numbers
- On-chip voltage regulator providing 3.3 V output
- Support for USB Specification 2.0 at full-speed (12 Mbps)
- UART interface with all handshaking and modem control signals
- Hardware or X-On/X-Off handshaking supported
- Configurable I/O voltage using VIO pin or external pull-up
- RS-485 mode with bus transceiver control
- Royalty-free Virtual COM Port (VCP) device drivers for various operating systems
Applications
- Upgrade of RS-232 and RS-485 legacy devices to USB
- Cellular phone and PDA USB interface cables
- USB to RS-232 serial adapters
- Industrial control systems and automation
- Medical devices and diagnostic equipment
- Consumer electronics requiring USB connectivity
Q & A
- What is the primary function of the CP2103-GMR?
The CP2103-GMR is a USB-to-UART Bridge Controller, designed to convert USB signals to UART (RS-232/RS-485) signals. - What are the supported baud rates for the CP2103-GMR?
The CP2103-GMR supports baud rates from 300 bps to 1 Mbps. - Does the CP2103-GMR require external components for USB functionality?
No, the CP2103-GMR integrates all necessary components, including the USB transceiver and clock, eliminating the need for external resistors or a crystal. - What is the purpose of the integrated EEPROM in the CP2103-GMR?
The integrated EEPROM allows for customization of USB descriptors such as vendor ID, product ID, serial number, and product description strings. - What operating systems are supported by the CP2103-GMR's Virtual COM Port (VCP) drivers?
The VCP drivers support Windows, Mac OS-X, and Linux operating systems. - What is the package type and size of the CP2103-GMR?
The CP2103-GMR is packaged in a 28-pin QFN package with a size of 5x5 mm. - Can the CP2103-GMR be used in RS-485 applications?
Yes, the CP2103-GMR supports RS-485 mode with bus transceiver control. - What are the supply voltage ranges for the CP2103-GMR?
The CP2103-GMR can operate with self-powered supply voltages from 3.0 to 3.6 V and USB bus-powered voltages from 4.0 to 5.25 V. - How many GPIO signals are available on the CP2103-GMR?
The CP2103-GMR provides four user-defined GPIO signals. - Is the CP2103-GMR RoHS compliant?
Yes, the CP2103-GMR is RoHS compliant and also meets other environmental standards such as REACH and halogen-free requirements.
