The eKT8123AW is a low-cost single chip solution for capacitive touch pad. It is an 8-bit RISC micro controller with I/O mode.
In function application, the eKT8123AW supports Button Information for customers. In data output, customers can use I/O mode to get a valid button message and develop their system very easily, and no longer need to decode the communication package. The capacitive touch pad sensor is covered with a plastic case. It can also auto calibrate the parameters for a wide range of capacitance on the touch pad sensor (5pF~25pF).
The system controller converts finger data to button presses, depending on finger location and human interface context.

Features

• Operating voltage: 2.6V ~ 5.5V, Ripple < 100mVpp
• Power-on reset time: Stable time for operating < 150ms
• Interface features: I/O Mode.
• Operating mode:

  Mode	Description	Current
  Normal	Finger on touch pad Higher scan rate	<1.5 mA
  Idle	Finger leaves touch pad Lower scan rate Scan rate in idle mode can be adjusted by changing the external RC value.	<200 µA
  Sleep	No scan	<20 µA

• Application mode:
  Button Information: Maximum supports 9 button to 9 GPIO (Normal High and
  Active Low).
• Useful Information
  Key buttons information can be acquired through I/O transition.
• Package type: QFN32