CP2102 chip Wiki
The CP2102 chip is a highly-integrated USB-to-UART Bridge controller providing a simple solution for updating RS-232 designs to USB using a minimum of components and PCB space.
The CP2102 includes a USB2.0 full speed function controller, USB transceiver, oscillator, EEPROM, and asynchronous serial data bus(UART) with full modem control signals in a compact 5 x 5mm QFN-28 package.
No other external USB components are required.
The on-chip EEPROM may be used to customized 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 onboard 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 CP2102-based product to appear as a COM port to PC applications.
The CP2102 UART interface implements all RS-232 signals, including control and handshaking signals, so existing system firmware does not need to be modified.
In many existing RS-232 designs, all that is required to update the design from RS232 to USB to replace the RS232 level-translator with the CP2102. Direct access driver support is available through the Silicon Laboratories USBXpress driver set.