CP2104EK Silicon Laboratories Inc, CP2104EK Datasheet - Page 15

KIT EVAL FOR CP2104

CP2104EK

Manufacturer Part Number
CP2104EK
Description
KIT EVAL FOR CP2104
Manufacturer
Silicon Laboratories Inc
Datasheets

Specifications of CP2104EK

Main Purpose
Interface, USB 2.0 to UART (RS485) Bridge
Embedded
No
Utilized Ic / Part
CP2104
Primary Attributes
Full Speed (12Mbps)
Secondary Attributes
LED Status Indicators
Interface Type
RS-232, USB
Operating Supply Voltage
3.3 V
Product
Interface Development Tools
For Use With/related Products
CP2104
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
336-2007
8. One-Time Programmable ROM
The CP2104 includes an internal one-time programmable ROM that may be used to customize the USB Vendor ID
(VID), Product ID (PID), Product Description String, Power Descriptor, Device Release Number, Device Serial
Number, GPIO configuration, Suspend pins and modes as desired for OEM applications. If the programmable
ROM has not been customized, the default configuration data shown in Table 12 and Table 13 is used.
While customization of the USB configuration data is optional, customizing the VID/PID combination is
recommended. A unique VID/PID combination will prevent 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 Labs VID. Customizing the serial number is also recommended if the OEM application is
one in which it is possible for multiple CP210x-based devices to be connected to the same PC.
The configuration data ROM can be programmed by Silicon Labs prior to shipment with the desired configuration
information. It can also be programmed in-system over the USB interface by adding a capacitor to the PCB. If
configuration ROM is to be programmed in-system, a 4.7 µF capacitor must be added between the VPP pin and
ground. No other circuitry should be connected to VPP during a programming operation, and V
3.3 V or higher to successfully write to the configuration ROM.
Vendor ID
Product ID
Power Descriptor (Attributes)
Power Descriptor (Max. Power) 32h (100 mA)
Release Number
Serial Number
Product Description String
GPIO.0
GPIO.1
GPIO.2
GPIO.3
Flush_Buffers
SUSPEND
SUSPEND
RS-485 Level
Name
Name
Table 13. Default GPIO, UART, and Suspend Configuration Data
Table 12. Default USB Configuration Data
10C4h
EA60h
80h (Bus-powered)
0100h (Release Version 01.00)
Unique 8 character ASCII string (63 characters maximum)
“CP2104 USB to UART Bridge Controller” (126 characters maximum)
GPIO Input
GPIO Input
GPIO Input
GPIO Input
Flush TX and RX FIFO on open
Push-pull
Push-pull
Active-High
Rev. 1.0
Value
Value
DD
CP2104
must remain at
15

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