FT5436DQQ(触控芯片) Datasheet(FT5436DQQ

Application Note for FT5426-5526 CTPM Application Note for FT5426 - 5526 CTPM Application Note for FT5426 - 5526CTPM Project name Touch panel Document ref Version Release date Owner Classification Distribution List Approval [Document ref] 0.1 2015.9.06 B.F.Lu This document contains information proprietary to FocalTech Systems, Ltd., and may not be reproduced, disclosed or used in whole or part without the express written permission of FocalTech Systems, Ltd. Copyright © 2015, FocalTech Systems, Ltd All rights reserved 3/F,Kingdom Sci-Tech Building, 5th Gaoxinnan Avenue, Hi-Tech Park, Nanshan District ,Shenzhen, Gungdong, P.R. China ZIP :518057 T +86 755 26588222 F +86 755 26712499 E support@focaltech-systems.com www.focaltech-systems.com THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

Application Note for FT5426-5526 CTPM Author Lu bingfeng Approved by THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD. Revision History Date Version List of changes 2015.09.06 0.1 Initial draft.

Application Note for FT5426-5526 CTPM 目录 1 1.1 CTPM interface to Host ............................................................................................................................................. 1 I2C Read/Write Interface description .................................................................................................................... 1 1.1.1 Host write data to slave .................................................................................................................................... 1 1.1.2 Host read data from slave ................................................................................................................................ 2 Interrupt signal from CTPM to Host ...................................................................................................................... 2 Reset signal from Host to CTPM........................................................................................................................... 3 Standard Application Circuit ...................................................................................................................................... 1 FT5426DQ8 typical application schematic............................................................................................................. 1 FT5526EEZ typical application schematic ............................................................................................................ 2 CTPM Register Mapping .......................................................................................................................................... 1 Working Mode ..................................................................................................................................................... 1 DEVICE_MODE.................................................................................................................................................. 3 GEST_ID ............................................................................................................................................................. 3 TD_STATUS ....................................................................................................................................................... 3 Pn_XH (n:1-5) ...................................................................................................................................................... 3 Pn_XL (n:1-5) ...................................................................................................................................................... 3 Pn_YH (n:1-5) ...................................................................................................................................................... 4 Pn_YL (n:1-2) ...................................................................................................................................................... 4 Pn_WEIGHT (n:1-5) ............................................................................................................................................ 4 Pn_MISC (n:1-5) .................................................................................................................................................. 5 Communication between host and CTPM .................................................................................................................. 5 Communication Contents ...................................................................................................................................... 5 I2C Example Code ............................................................................................................................................... 5 1.2 1.3 2 2.1 2.2 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 4 4.1 4.2 Terminology CTP – Capacitive touch panel CTPM – Capacitive touch panel module TX – Transmitter RX – Receiver THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

Application Note for FT5426-5526 CTPM 1 CTPM interface to Host Figure 1-1 shows how CTPM communicates with host device. I2C interface supported by FT5426-5526 that is two-wire serial bus consisting of data line SDA and clock line SCL, used for serial data transferring between host and slave device. Figure 1-1 CTPM and Host connection INT port and RST port form the control interface. The INT port is controlled by FT5426-5526, it will send out an interrupt request signal to the host when there is a valid touch on CTPM. Host can send the reset signal to CTPM via RST port to reset the FT5426-5526 if needed. The Power Supply voltage of CTPM ranges from 2.8V to 3.6V. For details, please refer to Table 1-1. Port Name VCC SDA SCL INT RST GND Table 1-1 Description for CTPM and Host interface Description CTPM power supply, ranges from 2.8V to 3.6V. I2C data input and output. I2C clock input. The interrupt request signal from CTPM to Host. The reset signal from host to CTPM, active low, and the low pulse width should be more than 1ms. Power ground. 1.1 I2C Read/Write Interface description It is important to note that the SDA and SCL must connect with a pull-high resistor respectively before you read/write I2C data. 1.1.1 Host write data to slave THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

Application Note for FT5426-5526 CTPM 1.1.2 Host read data from slave Step1: write data address Step2: read data 1.2 Interrupt signal from CTPM to Host As for standard CTPM, host needs to use both interrupt signal and I2C interface to get the touch data. CTPM will output an interrupt request signal to the host when there is a valid touch. Then host can get the touch data via I2C interface. If there is no valid touch detected, the INT will output high level, and the host does not need to read the touch data. There are two kinds of method to use interrupt: interrupt trigger and interrupt polling. Figure 1-2 Interrupt polling mode As for interrupt polling mode, INT will always be pulled to low level when there is a valid touch point, and be high level when a touch finished. THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

Application Note for FT5426-5526 CTPM Figure 1-3 Interrupt trigger mode 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 1.3 Reset signal from Host to CTPM. Host can send the reset signal via RST port to reset FT5426-5526. The reset signal should not be set to low while in normal working mode. The RST port can also be used to active the CTPM in hibernate mode. Note that the reset pulse width should be more than 1ms. THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

Application Note for FT5426-5526 CTPM 2 Standard Application Circuit Table 2-1 is a brief summary of the FT5426-5526 application features. Table 2-1 Brief features of FT5426-5526 IC Type Operating Voltage(V) Channel Panel Size Touch points Interface Report rate Package (mm) FT5426DQ8 2.8 ~ 3.6 28 TX + 16 RX FT5526EEZ 2.8 ~ 3.6 35 TX + 21 RX ≤8” 10 I2C >100Hz ≤10.1” 10 I2C >100Hz QFN 56L 6x6x0.6mm Pitch =0.35mm QFN 68L 8x8x0.8mm Pitch =0.4mm 2.1 FT5426DQ8 typical application schematic THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

Application Note for FT5426-5526 CTPM 2.2 FT5526EEZ typical application schematic Note: 1. 2. If GPIO supply voltage is set to VCC (2.8V~3.6V), IOVCC pin can be connected to VCC. If GPIO supply voltage is 1.8V, IOVCC pin can be connected to VDD18 pin or external 1.8V. THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS, LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN W HOLE OR PART W ITHOUT WRITTEN PERMISSION OF FOCALTECH SYSTEMS, LTD.

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FT5436DQQ(触控芯片) Datasheet(FT5436DQQ_DataSheet).pdf

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