CP2501EK Silicon Laboratories Inc, CP2501EK Datasheet - Page 3

• Manufacturer Part Number: CP2501EK
• Description: KIT EVALUATION CP2501
• Manufacturer: Silicon Laboratories Inc

Specifications of CP2501EK

• Main Purpose: Interface, Touch Screen Controller
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CP2501
• Primary Attributes: Evaluation Board with Glass Sensor (Laminated Glass Lens)
• Secondary Attributes: SPI, SMBus, or UART Interface
• Interface Type: USB, I2C, SPI, UART
• Operating Voltage: 3.3 V
• Data Bus Width: 16 bit
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• For Use With/related Products: CP2501, C8051F700
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 336-1989

4. Software Overview
The system firmware overview diagram is shown in Figure 3. The C8051F700 MCU samples the touch-screen and
sends X-Y coordinate information to the CP2501 over the UART interface at a periodic rate. The CP2501 firmware
creates USB touch-screen packets using the X-Y coordinate data and sends them to the USB host.
The source code for the CP2501 evaluation kit project is installed from the evaluation kit CD to the
C:\Silabs\MCU\CP2501EK\Firmware\default directory.
5. Additional Information
The following documents are available online at www.silabs.com and provide more information about CP2501
devices:


These documents are also available on the evaluation kit CD.
CP2501 Data Sheet
Application Note AN464: CP2501 Programmer’s Guide and API Specification
C8051F700
Sense peripheral
Figure 3. CP2501 System Firmware Overview
up to two touch
Use Capacitive
coordinates for
coordinates to
Calculate X-Y
to sample the
ITO touch
Send X-Y
CP2501
screen
points
Rev. 0.1
Collect data from
packet based on
operating mode:
the C8051F700
packet to USB
Single-touch
Create USB
Multi-touch
CP2501
Send USB
host using
Firmware
System
Mouse
CP2501-EK
3