KT2.x/KT3.x Pcap touch platform controller

KASA's KT System (128 or 256 SENSING CH RDK) consists of two or four analog sense interface IC KT6737 , one or two drive IC KT3005 and its Processing unit KT9006 . The system allows cascaded configuration, thus supporting various touch screen applications depending on the customer requirements. A typical application with two or four analog sense devices and one or two drive IC can support up to 208 or  416 channels (X+Y = 128+80 or 256+160=416).


The KT6737 is a high-precision capacitive analog sense interface IC featuring up to 64 sensing channels and the KT3005 is a high-voltage line driver featuring up to 80 driving channels with a high flexibility of the channel’s configuration. The 128 SENSING CH RDK allows high-speed scan rates up to 200Hz with multiple fingers capabilities (10+). This unique feature enables the magnificent feeling of real time processing of multiple users fingers and fast interactivity with large size touch displays.


Through a proprietary high-speed communication protocol, the data are transmitted to the KT9006 controller over a four wires serial data bus and stored into the frame buffer memory. The data processing, touch detection and tracking are handled by the embedded KT Processing unit. The cascaded function is directly managed by the controller through the communication interface.


Controller Touch Features

10+ touch detection & tracking (X,Y,Z)

AI algorithm

Palm rejection

Water rejection

Passive and Active Stylus

Touch Down Latency: 20ms

Touch Panning Latency: 15ms

Max Position refresh time: < 5ms

10240 max nodes (128x80) in 16:10 format

Controller Interface with slaves

SPI Data Interface D[3:0]: fmax = 16 MHz

Serial Clock (SCK)

Chip Select (CS) for Cascade Function

MOSI interface from Controller

Controller Interface with Host

USB2.0 HID interface – high speed

I2C HID – 400kHz

Power Consumption @5V

Active mode < 190mA (10 touches, 200Hz, 208Ch)

Suspend mode < 2.5mA

Wake-on touch < TBD mA (5Hz refresh)