SK7102 - FlexPoint™ PS/2 Pointing Stick Mouse Encoder


The SK7102 FlexPoint™ pointing stick mouse encoder is a cost-effective, space-saving and highly integrated IC that interfaces a force-stick sensor to PS/2 port.

The SK7102 works with most of popular force stick sensors with tolerance up to +/- 20%. The SK7102 highly integrates oscillator, analog and digital circuit. Only several low tolerance external components are needed.

Typically, consuming 0.89 mA, the SK7102 is ideal for battery-operated systems.

Deploying CellMute™ technology to filter the wireless EMI noise from cellular phones and wireless networks, the SK7102 can work quietly in wireless environment.

The SK7102 partially implements the Lenovo TrackPoint® extended command protocol and can work with Lenovo TrackPoint® device drivers directly.


  • Low cost and space saving solution
  • Built-in oscillator, analog and digital circuit
  • Low count of total components. Only several resistors and capacitor are needed
  • Advanced motion control algorithm
  • Z-Tap algorithm to simulate left button click, double click and drag
  • CellMute™ technology filters the wireless EMI noise from cellular phones and wireless networks
  • Works with standard Windows® mouse drivers
  • Works with Lenovo TrackPoint® drivers
  • Low profile QFN 24 pin package: 4x4mm 0.60 Max (LxWxH)
  • Low power consumption. 890uA (idle), 2.76 mA (operation)
  • 3.00V to 5.25V operating voltage
  • Industry temperature range: -40°C to +85°C

Typical Applications

  • Notebook/Laptop computer
  • Netbooks
  • Handhelds
  • Keyboards
  • Instrumentation

Technical Documents

Support Software

A set of software tools were developed to support SK7102 design. Click here to download these tools.
  • JOYTEST.exe - General Pointing Stick test program
  • PSCOM.exe - Send PS/2 command and receive response
  • AD reader - Read X, Y, Z AD value