Application Note for FT6x06 CTPM

THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE

REPRODUCED, DISCLOSED OR USED IN WHOLE OR PART WITHOUT WRITTEN PERMISSION OF FOCALTECH

SYSTEMS, LTD.

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While for interrupt trigger mode, INT signal will be set to low if there is a touch detected. But whenever an

update of valid touch data, CTPM will produce a valid pulse on INT port for INT signal, and host can read

the touch data periodically according to the frequency of this pulse. In this mode, the pulse frequency is the

touch data updating rate.

When CTPM stays in hibernate mode, the INT port will act as a pull-high input port and wait for an

external wake up signal. Host may send out a low pulse to wake up CTPM from the hibernate mode. The

wake-up low pulse width ranges from 0.5 ms to 1 ms, the reason for this is that the INT port will act as an

interrupt request signal output port after wake-up.

1.3

Reset signal from Host to CTPM

Host can send the reset signal via RSTN port to reset FT6x06. The reset signal should not be set to low

while in normal running mode, but when programming flash, the RSTN port must be connected to GND.

The RSTN port can also be used to active the CTPM in hibernate mode. Note that the reset pulse width

should be more than 1ms.

2. Standard Application circuit of FT6x06

Table 2-1 is a brief summary of the FT6x06 application features. Figure2-1, Figure2-2, demonstrates the

typical FT6x06 application schematic respectively. It consists of Capacitive Touch Panel (CTP), FT6x06

chip, and some peripheral components. According to the size of CTPM, you can choose the number of

channels needed.

Table 2-1 Brief features of FT6X06

IC Type

FT6206GMA

FT6306DMB

Operating Voltage(V)

2.8 ~ 3.6

2.8 ~ 3.6

IOVCC(V)

1.8 ~ 3.6

1.8 ~ 3.6

Channel

28

36

Panel Size

2.8” ~ 4.3”

4.3” ~ 7.0”

Touch points

2

2

Interface

Report rate

>60Hz

>60Hz

Package (mm)

5*5 QFN40

6*6 QFN48