CP2103 Datasheet, PDF (14/18 Pages) List of Unclassifed Manufacturers – SINGLE-CHIP USB TO UART BRIDGE

CP2103
Table 8. Default USB Configuration Data
Name
Value
Vendor ID
10C4h
Product ID
EA60h
Power Descriptor (Attributes) 80h
Power Descriptor (Max.
32h
Power)
Release Number
0100h
Serial Number
0001 (63 characters maximum)
Product Description String “CP2103 USB to UART Bridge Controller” (126 characters maximum)
9. Virtual Com Port Device Drivers
The CP210x Virtual COM Port (VCP) device drivers allow a CP2103-based device to appear to the PC's
application software as an additional COM port (in addition to any existing hardware COM ports). 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. Therefore,
existing COM port applications may be used to transfer data via the USB to the CP2103-based device without
modifying the application. Contact Silicon Laboratories for the latest list of supported operating systems.
Note: Silicon Laboratories’ VCP device drivers are required for device operation and are only distributed as part of the CP2103
Evaluation Kit (Part Number: CP2103EK). Contact any of Silicon Lab’s sales representatives or go to www.silabs.com to
order the CP2103 Evaluation Kit. The CP210x drivers and programming utilities are subject to change without notice.
Subscription to the website "Auto Email Alert" system for automatic notification of updates and the use of the "Product
Update Registration" service is recommended.
10. USBXpress^™ Direct Driver Support
The Silicon Laboratories USBXpress™ for CP210x Development Kit provides an alternate solution for interfacing
with CP2103 devices than using the Virtual COM port. No Serial Port protocol expertise is required. Instead, a
simple, high-level application program interface (API) is used to provide simpler CP2103 connectivity and
functionality.
The USBXpress for CP210x Development Kit includes Windows device drivers, Windows device driver installer
and uninstallers, and a host interface function library (host API) provided in the form of a Windows Dynamic Link
Library (DLL). The included device drivers and installation files support MS Windows 98SE/2000/XP.
11. 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 Figure 7 and Figure 8.
When enabled, the 3 V voltage regulator output appears on the V_DD pin and can be used to power external 3 V
devices. See Table 9 for the voltage regulator electrical characteristics.
Alternatively, if 3 V power is supplied to the V_DD 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
application note “AN144: CP210x 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.
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Preliminary Rev. 0.2