Confidential Application Note for CTPM Application Note for CTPM Project name Touch panel Document ref [Document ref] Version 0.7 Release date 18 Aug 2010 Owner Xiaoxu Du Classification Confidential Distribution List [Distribution list] Approval 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 © 2010, FocalTech Systems, Ltd All rights reserved R3-B4-A, South Area, Shenzhen Hi-Tech Industrial Park, Shenzhen, Gungdong, P.R. China ZIP :518057 T +86 755 26588222 F +86 755 26712499 E [email protected] www.focaltech-systems.com Confidential CTPM Application Note Revision History Date Version List of changes Author + Signature 18 Jan, 2010 0.1 Initial draft Xiaoxu Du 17 Mar,2010 0.2 Add raw data protocol Xiaoxu Du 22 Mar,2010 0.3 Add system information protocol Xiaoxu Du 26 Mar,2010 0.4 Add calibration related parameters Xiaoxu Du 08 May,2010 0.5 Add information to operating mode Xinming Wang 07 Jul, 2010 0.6 Change Protocol and add information Yunfeng Yuan 18 Aug, 2010 0.7 Modified to release version Xiaoxu Du ii FocalTech Systems, Ltd. Confidential CTPM Application Note Table of Contents 1 I2C Interface .................................................................................................................................... 2 1.1 CTPM interface to Host .................................................................................................................. 2 1.2 I2C Read/Write Interface description .............................................................................................. 2 1.3 Interrupt signal from CTPM to Host ............................................................................................... 3 1.4 Wakeup signal from Host to CTPM................................................................................................ 4 2 CTP Register Mapping.................................................................................................................... 4 2.1 Operating Mode .............................................................................................................................. 4 2.1.1 DEVICE_MODE ................................................................................................................... 7 2.1.2 GEST_ID ............................................................................................................................... 7 2.1.3 TD_STATUS .......................................................................................................................... 8 2.1.4 TOUCHn_XH (n:1-5) ............................................................................................................ 8 2.1.5 TOUCHn_XL (n:1-5)............................................................................................................. 8 2.1.6 TOUCHn_YH (n:1-5) ............................................................................................................ 9 2.1.7 TOUCHn_YL (n:1-5)............................................................................................................. 9 2.1.8 ID_G_THGROUP ................................................................................................................. 9 2.1.9 ID_G_THPEAK..................................................................................................................... 9 2.1.10 ID_G_ THCAL....................................................................................................................... 9 2.1.11 ID_G_ THWATER ................................................................................................................. 9 2.1.12 ID_G_ THTEMP ................................................................................................................... 9 2.1.13 ID_G_ THDIFF................................................................................................................... 10 2.1.14 ID_G_ CTRL ....................................................................................................................... 10 2.1.15 ID_G_ TIMEENTERMONITOR.......................................................................................... 10 2.1.16 ID_G_ PERIODACTIVE ..................................................................................................... 10 2.1.17 ID_G_ PERIODMONITOR................................................................................................. 10 2.1.18 ID_G_ AUTO_CLB_MODE................................................................................................ 10 2.1.19 ID_G_ LIB_VERSION_H .................................................................................................... 11 2.1.20 ID_G_ LIB_VERSION_L..................................................................................................... 11 2.1.21 ID_G_ CIPHER................................................................................................................... 11 2.1.22 ID_G_ MODE ..................................................................................................................... 11 2.1.23 ID_G_ PMODE ................................................................................................................... 11 2.1.24 ID_G_ FIRMWARE_ID....................................................................................................... 11 2.1.25 ID_G_ STATE...................................................................................................................... 11 2.1.26 ID_G_ FT5201ID ................................................................................................................ 12 2.1.27 ID_G_ ERR.......................................................................................................................... 12 2.1.28 ID_G_ CLB.......................................................................................................................... 12 2.2 Test Mode ..................................................................................................................................... 12 2.2.1 DEVICE_MODE ................................................................................................................. 14 2.2.2 ROW_ADDR........................................................................................................................ 14 2.2.3 ROWDATAN_H................................................................................................................... 14 2.2.4 ROWDATAN_L.................................................................................................................... 15 2.3 System information Mode............................................................................................................. 16 2.3.1 DEVICE_MODE ................................................................................................................. 17 2.3.2 BIST_COMM....................................................................................................................... 17 iii FocalTech Systems, Ltd. Confidential CTPM Application Note 2.3.3 BIST_STAT .......................................................................................................................... 17 2.3.4 BL_VERH ............................................................................................................................ 17 2.3.5 BL_VERL............................................................................................................................. 18 2.3.6 FTS_IC_VERH .................................................................................................................... 18 2.3.7 FTS_IC_VERL..................................................................................................................... 18 2.3.8 APP_IDH............................................................................................................................. 18 2.3.9 APP_IDL ............................................................................................................................. 18 2.3.10 APP_VERH ......................................................................................................................... 19 2.3.11 APP_VERL .......................................................................................................................... 19 2.3.12 CID_n(n:0-4)....................................................................................................................... 19 3 CTPM Application Introduction ................................................................................................... 20 3.1 Standard Application information of FT5X06 .............................................................................. 20 3.1.1 Standard application circuit of FT5206GE1 ....................................................................... 20 3.1.2 Standard application circuit of FT5306DE4 ....................................................................... 21 3.1.3 Standard application circuit of FT5206EE8 ....................................................................... 22 4 Communication between host and CTPM .................................................................................... 22 4.1 Communication Contents.............................................................................................................. 22 4.2 I2C Example Code ........................................................................................................................ 23 iv FocalTech Systems, Ltd. Confidential CTPM Application Note Terminology CTP – Capacitive touch panel CTPM – Capacitive touch panel module 1 FocalTech Systems, Ltd. Confidential CTPM Application Note 1 I2C Interface 1.1 CTPM interface to Host Figure 1-1 shows how CTPM communicates with the Host，there are three kind of communication between CTPM and Host，we will introduce each communication in this section. Transfer the data via I2C Send interrupt when there is a valid touch Host send Wakeup signal to CTPM Serial Interface TX CTP Controller CTP MCU /INT Host RX /WAKE Figure 1-1 CTPM and Host connection The Power Supply voltage of CTPM is 2.8V~3.3V, interface supply voltage is 2.8V~3.3V. There are Control Interface and Data Interface. As Figure 1-1 demonstrates, Serial interface is the data interface, /INT and /WAKE are the control interface. For the detail, please refer to Table 1-1. Table 1-1 Description for TP module and Host interface Port Name Voltage Polar Description Serial interface 2.8~3.3V /INT 2.8~3.3V LOW The interrupt from the CTPM to the Host /WAKE* 2.8~3.3V LOW Wakeup signal from host to the CTPM Serial interface is for data transfer between Host and CTPM. CTPM support both I2C and SPI interface 1.2 I2C Read/Write Interface description Write N bytes to I2C slave Slave Addr Data Address[X] Data [X] Data [X+N-1] A A A A A A A R R R R R R R R R D D D D D D D D D D D D D D D D S A A A … A P 6 5 4 3 2 1 0 W 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 2 FocalTech Systems, Ltd. Confidential STOP ACK ACK ACK ACK WRITE START Set Data Address CTPM Application Note Slave Addr Data Address[X] A A A A A A A R R R R R R R R R S A A P 6 5 4 3 2 1 0 W 7 6 5 4 3 2 1 0 STOP ACK ACK WRITE START Read X bytes from I2C Slave S Slave Addr Data [N] Data [X+N-1] A A A A A A A R D D D D D D D D D D D D D D D D A A … A P 6 5 4 3 2 1 0 W 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 STOP ACK ACK ACK Read START 1.3 Interrupt signal from CTPM to Host As for standard CTPM, host need to use both interrupt control signal and serial data interface to get the touch data. There are two kind of method to use interrupt: interrupt trigger and interrupt query. Here is the timing to get touch data. Touch Start Touch End /INT Serial Data Blank Data Packet 0 Data Packet 1 …… Data Packet N Blank Figure 1-2 Interrupt query mode Touch Start Touch End /INT Serial Data Blank Data Packet 0 Data Packet 1 …… Data Packet N Blank Figure 1-3 Interrupt trigger mode Host use general I2C protocol to read the touch data or the information from CTPM . CTPM will send host a interrupt signal when there is a valid touch. Then host can use the serial data interface to get the touch data. If there is no valid touch detected, the /INT will not be pulled up, the host do not need to read the touch data. NOTE: “valid touch” may have different definition in various systems. For example, in some systems, the valid touch is defined as there is one more valid touch point. But in some other systems, the valid touch is defined as one more valid touch with valid gestures. In usual, /INT will be pulled up when there is a valid touch point, and to be low when a touch finishes. As for interrupt trigger mode, /INT signal will be low if there is no touch detected. But for per update of valid touch data, CTPM will produce a valid pulse for /INT signal, host can read the touch data periodically according to the frequency of this pulse. In this mode, the pulse frequency is the touch data update frequency. 3 FocalTech Systems, Ltd. Confidential CTPM Application Note . 1.4 Wakeup signal from Host to CTPM Host can use the Wakeup Signal to wakeup the I2C slave device. This pin should be connected to GND when flash programming while in normal running mode it should not be connected to GND. 2 CTP Register Mapping This chapter describes the standard FTS Capacitive Touch Panel products communication registers in address order for each device mode. The most detailed descriptions of the Standard Products communication registers are in the Register Definitions section of each chapter. The device modes are listed in the table below, along with each mode’s register prefix. Device Mode Prefix Val Description Operating Op 000b Read touch point and gesture Test Te 100b Read raw data System Information Sy 001b Read system information related Reserved 2.1 Operating Mode In this mode the CTP is fully functional as a touch screen controller. Read and write access address is just logical address which is not enforced by hardware or firmware. Here is the operating mode register map. Operating Mode Register Map Address Name Bit7 Bit6 Bit5 Bit4 Op,00h DEVIDE_MODE Op,01h GEST_ID Op,02h TD_STATUS Op,03h TOUCH1_XH 1stEvent Flag Op,04h TOUCH1_XL 1st Touch X Position[7:0] Op,05h TOUCH1_YH 1st Touch ID[3:0] Op,06h TOUCH1_YL 1st Touch Y Position[7:0] TOUCH2_XH 2ndEvent Bit3 Bit2 Bit1 Device Mode[2:0] Bit0 Host Access RW Gesture ID[7:0] R Number of touch points[3:0] R 1st Touch X Position[11:8] R R 1st Touch Y Position[11:8] R R Op,07h Op,08h Op,09h 4 FocalTech Systems, Ltd. Confidential 2ndTouch R CTPM Application Note Flag Op,0Ah TOUCH2_XL X Position[11:8] 2nd touch X Position[7:0] nd Op,0Bh TOUCH2_YH 2 Touch ID[3:0] Op,0Ch TOUCH2_YL 2nd Touch Y Position[7:0] R nd 2 Touch Y Position[11:8] R R Op,0Dh R Op,0Eh R Op,0Fh TOUCH3_XH 3rdEvent Flag Op,10h TOUCH3_XL 3rd Touch X Position[7:0] Op,11h TOUCH3_YH 3rd Touch ID[3:0] Op,12h TOUCH3_YL 3rd Touch Y Position[7:0] 3rd Touch X Position[11:8] R R 3rd Touch Y Position[11:8] R R Op,13h R Op,14h R th Op,15h TOUCH4_XH 4 Event Flag Op,16h TOUCH4_XL 4th Touch X Position[7:0] Op,17h TOUCH4_YH 4th Touch ID[3:0] Op,18h TOUCH4_YL 4th Touch Y Position[7:0] th 4 Touch X Position[11:8] R R 4th Touch Y Position[11:8] R R Op,19h R Op,1Ah R th Op,1Bh TOUCH5_XH 5 Event Flag Op,1Ch TOUCH5_XL 5thTouch X Position[7:0] th Op,1Dh TOUCH5_YH 5 Touch ID[3:0] Op,1Eh TOUCH5_YL 5th Touch Y Position[7:0] th 5 Touch X Position[11:8] R R th 5 Touch Y Position[11:8] R R Op,1Fh R Op,20h R Op,21h Reserved … … Op,7Fh Reserved Op,80h ID_G_THGROUP valid touching detect threshold. R/W Op,81h ID_G_THPEAK valid touching peak detect threshold. R/W 5 FocalTech Systems, Ltd. Confidential CTPM Application Note Op,82h ID_G_THCAL the threshold when calculating the focus of touching. R/W Op,83h ID_G_THWATER the threshold when there is surface water. R/W Op,84h ID_G_THTEMP the threshold of temperature compensation. R/W Op,85h R/W Op,86h ID_G_CTRL Power control mode[1:0] Op,87h ID_G_TIME_ENTER _MONITOR Op,88h ID_G_PERIODACTIVE Op,89h ID_G_PERIOD MONITOR The timer of entering monitor status Period Active[3:0] The timer of entering idle while in monitor status R/W R/W R/W R/W Op,8Ah R/W Op,8Bh R/W Op,8Ch R/W Op,8Dh R/W Op,8Eh R/W Op,8Fh R/W Op,90h R/W Op,91h R/W Op,92h R/W Op,93h R/W Op,94h R/W Op,95h R/W Op,96h R/W Op,97h R/W Op,98h R/W Op,99h R/W Op,9Ah R/W Op,9Bh R/W Op,9Ch R/W Op,9Dh R/W Op,9Eh R/W Op,9Fh R/W Op,A0h ID_G_AUTO_CLB _MODE auto calibration mode 6 FocalTech Systems, Ltd. Confidential R/W CTPM Application Note Op,A1h ID_G_LIB_ VERSION_H Firmware Library Version H byte R Op,A2h ID_G_LIB _VERSION_L Firmware Library Version L byte R Op,A3h ID_G_CIPHER Chip vendor ID R Op,A4h ID_G_MODE the interrupt status to host R Op,A5h ID_G_PMODE Power Consume Mode Op,A6h ID_G_FIRMID Firmware ID Op,A7h ID_G_STATE Running State Op,A8h ID_G_FT5201ID CTPM Vendor ID R Op,A9h ID_G_ERR Error Code R Op,AAh ID_G_CLB Configure TP module during calibration in Test Mode R/W R Op,ABh R/W Op,ACh R/W Op,ADh R/W Op,AEh ID_G_B_AREA_TH The threshold of big area Op,AFh R/W R/W … … Op,FDh Reserved Op,FEh LOG_MSG_CNT The log MSG count R Op,FFh LOG_CUR_CHA Current character of log message, will point to the next character when one character is read. R 2.1.1 DEVICE_MODE This register is the device mode register, configure it to determine the current mode of the chip. Address Bit Address Register Name Description Op,00h 6:4 Device Mode [2:0] 000b 001b 100b 2.1.2 Normal operating Mode System Information Mode (Reserved) Test Mode – read raw data (Reserved) GEST_ID This register describes the gesture of a valid touch. Address Bit Address Register Name Description Op,01h 7:0 Gesture ID [7:0] Gesture ID 0x10 Move UP 7 FocalTech Systems, Ltd. Confidential CTPM Application Note 0x14 Move Left 0x18 Move Down 0x1C Move Right 0x48 Zoom In 0x49 Zoom Out 0x00 No Gesture 2.1.3 TD_STATUS This register is the Touch Data status register. Address Bit Address Register Name Description Op,02h 3:0 Number of touch points[3:0] How many points detected. 1-5 is valid. 7:4 2.1.4 TOUCHn_XH (n:1-5) This register describes MSB of the X coordinate of the nth touch point and the corresponding event flag. Address Bit Address Op,03h ~ Op,39h 7:6 Register Name Event Flag 00b: 01b: 10b: 11b: 5:4 3:0 2.1.5 Description Put Down Put Up Contact Reserved Reserved Touch X Position [11:8] MSB of Touch X Position in pixels TOUCHn_XL (n:1-5) This register describes LSB of the X coordinate of the nth touch point. Address Bit Address Register Name Description Op,04h ~ Op,3Ah 7:0 Touch X Position [7:0] LSB of the Touch X Position in pixels 8 FocalTech Systems, Ltd. Confidential CTPM Application Note 2.1.6 TOUCHn_YH (n:1-5) This register describes MSB of the Y coordinate of the nth touch point and corresponding touch ID. Address Bit Address Register Name Description Op,05h ~ Op,3Bh 7:4 Touch ID[3:0] Touch ID of Touch Point 3:0 Touch X Position [11:8] MSB of Touch Y Position in pixels 2.1.7 TOUCHn_YL (n:1-5) This register describes LSB of the Y coordinate of the nth touch point. Address Bit Address Register Name Description Op,06h ~ Op,3Ch 7:0 Touch X Position [7:0] LSB of The Touch Y Position in pixels 2.1.8 ID_G_THGROUP This register describes valid touching detect threshold. Address Bit Address Register Name Description Op,80h 7:0 ID_G_THGROUP The actual value will be 4 times of the register’s value. Default:280/4 2.1.9 ID_G_THPEAK This register describes valid touching peak detect threshold. Address Bit Address Register Name Description Op,81h 7:0 ID_G_ THPEAK Default:60 2.1.10 ID_G_ THCAL This register describes threshold when calculating the focus of touching. Address Bit Address Register Name Description Op,82h 7:0 ID_G_ THCAL Default:16 2.1.11 ID_G_ THWATER This register describes threshold when there is surface water. Address Bit Address Register Name Description Op,83h 7:0 ID_G_ THWATER Default:60 2.1.12 ID_G_ THTEMP This register describes threshold of temperature compensation. 9 FocalTech Systems, Ltd. Confidential CTPM Application Note Address Bit Address Register Name Description Op,84h 7:0 ID_G_ THTEMP Default:10 2.1.13 ID_G_ THDIFF This register describes threshold whether the coordinate is different from the original. Address Bit Address Register Name Description Op,85h 7:0 ID_G_ THDIFF The actual value must be 32timers of the register’s value. Default :20 2.1.14 ID_G_ CTRL This register describes the run mode of microcontroller controlled by host Address Bit Address Register Name Description Op,86h 0 ID_G_ CTRL 0: not auto jump 1:auto jump 2.1.15 ID_G_ TIMEENTERMONITOR This register describes the time delay value when entering monitor status. Address Bit Address Register Name Description Op,87h 7:0 ID_G_TIME ENTERMONITOR Default :2 2.1.16 ID_G_ PERIODACTIVE This register describes the period of active status, it should not less than 12 Address Bit Address Register Name Description Op,88h 4:0 ID_G_ PERIOD ACTIVE Range form 3 to 14,default 12 7:4 2.1.17 ID_G_ PERIODMONITOR This register describes period of monitor status, it should not less than 30. Address Bit Address Register Name Description Op,89h 7:0 ID_G_ PERIOD MONITOR Default:40 2.1.18 ID_G_ AUTO_CLB_MODE This register describes auto calibration mode. Address Bit Address Register Name Description Op, A0h 7:0 ID_G_ AUTO_ 8’h 00: enable auto calibration 10 FocalTech Systems, Ltd. Confidential CTPM Application Note CLB_MODE 8’h ff: disable auto calibration 2.1.19 ID_G_ LIB_VERSION_H This register describes library version high byte. Address Bit Address Register Name Description Op, A1h 7:0 ID_G_LIB_VERSION_H R: xx 2.1.20 ID_G_ LIB_VERSION_L This register describes library version low byte. Address Bit Address Register Name Description Op, A2h 7:0 ID_G_ LIB_VERSION_L R: xx 2.1.21 ID_G_ CIPHER This register describes vendor’s chip id. Address Bit Address Register Name Description OP, A3h 7:0 ID_G_ CIPHER R: xx 2.1.22 ID_G_ MODE This register describes the interrupt status to host. Address Bit Address Register Name Description Op,A4h 7:0 ID_G_ MODE 0: enable interrupt to host 1: disable interrupt to host 2.1.23 ID_G_ PMODE This register describes the power consumption mode of the TPM when in running status. Address Bit Address Register Name Description Op,A5h 7:0 ID_G_ PMODE 0: active 1: monitor 3: hibernate(deep sleep) 2.1.24 ID_G_ FIRMWARE_ID This register describes the firmware id of the application. Address Bit Address Register Name Description Op,A6h 7:0 ID_G_ FIRMWARE_ID R: xx 2.1.25 ID_G_ STATE This register is used to configure the run mode of TPM. Address Bit Address Register Name 11 FocalTech Systems, Ltd. Confidential Description CTPM Application Note Op,A7h 7:0 ID_G_ STATE 0: configure 1: work 2: calibration 3: factory 4: auto calibration 2.1.26 ID_G_ FT5201ID This register describes vendor’s chip id Address Bit Address Register Name Description Op,A8h 7:0 ID_G_ FT5201ID R: xx 2.1.27 ID_G_ ERR This register describes the error code when the TPM is running. Address Bit Address Register Name Description Op,A9h 7:0 ID_G_ ERR ERR Code 8’h00:OK 8’h03:chip register writing inconsistent with reading 8’h05:chip start fail 8’h1A:no match among the basic input(such as TX_ORDER) while calibration 2.1.28 ID_G_ CLB This register is used to configure the TPM when Calibration Address Bit Address Register Name Description Op,AAh 7:0 ID_G_ CLB Mapping the Array of G_Bank1, total length is NUM_TX+NUM_RX+1. the array address increases 1 after every write. 2.2 Test Mode In this mode, CTP will provide some panel related information. Host can get the following information in this mode Raw data of touch panel Panel configure related information Test Mode Register Map Address Name Bit7 Bit6 Te,00h DEVIDE_MODE Data Read Toggle Device Mode[2:0] 12 FocalTech Systems, Ltd. Confidential Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Host Access RW CTPM Application Note Te,01h ROW_ADDR The address of the row to be read RW Te,02h START_SCAN Start the scan command, the value stands for the scan frequency, will be set to zero when scan finishes RW Te,03h ROW_NUM Panel row number RW Te,04h COL_NUM Panel column number RW Te,05h DRIVER_VOL Driver voltage of chip RW Te,06h START_RX Setting the RX start number RW Te,07h GAIN Control the difference value for touching RW Te,08h ORIGIN_XH High byte of origin X coordinate RW Te,09h ORIGIN_XL Low byte of origin X coordinate RW Te,0Ah ORIGIN_YH High byte of origin Y coordinate RW Te,0Bh ORIGIN_YL Low byte of origin Y coordinate RW Te,0Ch RES_WH High byte of width of resolution RW Te,0Dh RES_WL Low byte of width of resolution RW Te,0Eh RES_HH High byte of height of resolution RW Te,0Fh RES_HL Low byte of height of resolution RW Te,10h RAWDATA0_H High byte of raw data 0 R Te,11h RAWDATA0_L Low byte of raw data 0 R Te,12h RAWDATA1_H High byte of raw data 1 R Te,13h RAWDATA1_L Low byte of raw data 1 R … … … Te,4Ah RAWDATA29_H High byte of raw data 29 R Te,4Bh RAWDATA29_L Low byte of raw data 29 R Te,4Ch TH_POINT_NUM Touch point number support RW Te,4Dh Reserved Te,4Eh Reserved Te,4Fh Reserved Te,50h TX_ORDER_0 TX Order, start from zero RW Te,51h TX_ORDER_1 … … Te,77h TX_ORDER_39 Te,78h ROW0_CAC Charge Amplifier feedback Capacitance of ROW0 RW Te,79h ROW1_CAC Charge Amplifier feedback Capacitance of ROW1 RW … … … Te,9Fh ROW39_CAC Charge Amplifier feedback Capacitance of ROW39 RW … RW RW 13 FocalTech Systems, Ltd. Confidential RW CTPM Application Note Te,A0h COL0_CAC Charge Amplifier feedback Capacitance of COL0 RW … … … Te,BEh COL29_CAC Charge Amplifier feedback Capacitance of COL29 RW Te,BFh ROW0_1_OFFSET Offset of ROW1 Offset of ROW0 RW … … … … Te,D2h ROW38_39_OFFSET Offset of ROW39 Offset of ROW38 RW Te,D3h COL0_1_OFFSET Offset of COL1 Offset of COL0 RW … … … … Te,E1h COL28_29_OFFSET Offset of COL29 Offset of COL28 … … Te,FEh LOG_MSG_CNT The log MSG count R Te,FFh LOG_CUR_CHA Current character of log message, will point to the next character when one character is read. R 2.2.1 DEVICE_MODE RW This register is the device mode register, configure it to determine the current mode of the chip. Address Bit Address Register Name Description Te,00h 7 Data Read Toggle This bit is toggled by the Host only when a data transfer between the Host and TrueTouch device requires register based handshaking. 6:4 Device Mode[2:0] 000b 001b 100b 2.2.2 Normal operating Mode System Information Mode (Reserved) Test Mode – read raw data (Reserved) ROW_ADDR This register is the Touch Data status register. Address Bit Address Register Name Description Te,01h 7:0 Row address The address of the row to be read Please delay for more than 100us, then read the raw data 2.2.3 ROWDATAN_H This register is the Touch Data status register. Address Bit Address Register Name Description Te,(10+2n)h 7:0 High byte of raw data N High byte of raw data N 14 FocalTech Systems, Ltd. Confidential CTPM Application Note If N exceeds the column number will return 0xff 2.2.4 ROWDATAN_L This register is the Touch Data status register. Address Bit Address Register Name Description Te,(10+2n+1)h 7:0 Low byte of raw data N Low byte of raw data N If N exceeds the column number will return 0xff 15 FocalTech Systems, Ltd. Confidential CTPM Application Note 2.3 System information Mode This mode provides access to all of the one-time system information. The system information is either written by the host to permanently configure the device (for example, power timers), or is written to the device at compile time for the host to read (for example, application version). To enter BIST (built in self test) mode write the BIST command required into the BIST_COMM register. Read and write access is theoretical and is not enforce by hardware or firmware. Words have their MSB at lower address. System Information Mode Register Map Address Name Bit7 Bit6 Sy,00h DEVIDE_MODE Data Read Toggle Device Mode[2:0] Sy,01h BIST_COMM BIST Command[7:0] W Sy,02h BIST_STAT BIST Status[7:0] R Sy,03h Unused Sy,04h Unused Sy,05h Unused Sy,06h Unused Sy,07h UID_0 Unique Silicon ID #0[7:0] R Sy,08h UID_1 Unique Silicon ID #1[7:0] R Sy,09h UID_2 Unique Silicon ID #2[7:0] R Sy,0Ah UID_3 Unique Silicon ID #3[7:0] R Sy,0Bh UID_4 Unique Silicon ID #4[7:0] R Sy,0Ch UID_5 Unique Silicon ID #5[7:0] R Sy,0Dh UID_6 Unique Silicon ID #6[7:0] R Sy,0Eh UID_7 Unique Silicon ID #7[7:0] R Sy,0Fh BL_VERH Bootloader version[15:8] R Sy,10h BL_VERL Bootloader version[7:0] R Sy,11h FTS_IC_VERH Focal Tech IC Version[15:8] R Sy,12h FTS_IC_VERL Focal Tech IC Version[7:0] R Sy,13h APP_IDH Application ID[15:8] R Sy,14h APP_IDL Application ID[7:0] R Sy,15h APP_VERH Application Version[15:8] R Sy,16h APP_VERL Application Version[7:0] R Sy,17h Unused 16 FocalTech Systems, Ltd. Confidential Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Host Access RW CTPM Application Note Sy,18h Unused Sy,19h Unused Sy,1Ah Unused Sy,1Bh CID_0 Custom ID #0[0:7] R Sy,1Ch CID_1 Custom ID #1[0:7] R Sy,1Dh CID_2 Custom ID #2[0:7] R Sy,1Eh CID_3 Custom ID #3[0:7] R Sy,1Fh CID_4 Custom ID #4[0:7] R … … Sy,FEh LOG_MSG_CNT The log MSG count R Sy,FFh LOG_CUR_CHA Current character of log message, will point to the next character when one character is read. R 2.3.1 DEVICE_MODE This register is the device mode register, configure it to determine the current mode of the chip. Address Bit Address Register Name Description Sy,00h 6:4 Device Mode[2:0] 000b 001b 100b 2.3.2 BIST_COMM Normal operating Mode System Information Mode (Reserved) Test Mode – read raw data (Reserved) This register is the BIST command register. The BIST (built in self test) function to perform is set here. Address Bit Address Register Name Description Sy,01h 7:0 BIST Command[7:0] BIST command to perform. 2.3.3 BIST_STAT This register reports the status of BIST (built in self test) functions either in progress or the last function completed. Address Bit Address Register Name Description Sy,02h 7:0 BIST Command[7:0] Status of the last BIST function started. 2.3.4 BL_VERH This register contains the MSB of the bootloader version specified by the application. Address Bit Address Register Name Description Sy,0Fh 7:0 Bootloader version[15:8] R:xx 17 FocalTech Systems, Ltd. Confidential CTPM Application Note 2.3.5 BL_VERL This register contains the LSB of the bootloader version specified by the application. Address Bit Address Register Name Description Sy,10h 7:0 Bootloader version[7:0] R:xx. 2.3.6 FTS_IC_VERH This is the FTS IC version register. This register contains the MSB of the FTS IC version. The value is BCD value, for example FT5201 – FTS_IC_VERH(0x52), FTS_IC_VERL(0x01) FT5202 – FTS_IC_VERH(0x52), FTS_IC_VERL(0x02) FT5206 – FTS_IC_VERH(0x52), FTS_IC_VERL(0x06) FT5306 – FTS_IC_VERH(0x53), FTS_IC_VERL(0x06) FT5406 – FTS_IC_VERH(0x54), FTS_IC_VERL(0x06) Address Bit Address Register Name Sy,11h 7:0 Focal Tech [15:8] 2.3.7 Description IC version Focal Tech IC Version MSB FTS_IC_VERL This is the FTS IC version register. This register contains the MSB of the FTS IC version. The value is BCD value, for example FT5201 – FTS_IC_VERH(0x52), FTS_IC_VERL(0x01) FT5202 – FTS_IC_VERH(0x52), FTS_IC_VERL(0x02) FT5206 – FTS_IC_VERH(0x52), FTS_IC_VERL(0x06) FT5306 – FTS_IC_VERH(0x53), FTS_IC_VERL(0x06) FT5406 – FTS_IC_VERH(0x54), FTS_IC_VERL(0x06) Address Bit Address Register Name Description Sy,12h 7:0 Focal Tech IC version [7:0] Focal Tech IC Version LSB 2.3.8 APP_IDH This is the application ID register. This register contains the MSB of the application ID. This value is set to designate the individual project. Address Bit Address Register Name Description Sy,13h 7:0 Application Version [15:8] R:xx 2.3.9 APP_IDL This is the application ID register. This register contains the MSB of the application ID. This value is set to designate the individual project. 18 FocalTech Systems, Ltd. Confidential CTPM Application Note Address Bit Address Register Name Description Sy,14h 7:0 Application Version [15:8] R:xx 2.3.10 APP_VERH This is the application version register. This register contains the MSB of the application version. This value should be incremented on each internal or external release of the project. Address Bit Address Register Name Description Sy,15h 7:0 Application Version [15:8] R:xx 2.3.11 APP_VERL This is the application version register. This register contains the LSB of the application version. This value should be incremented on each internal or external release of the project. Address Bit Addr. Reg. Name Description Sy,16h 7:0 Application Version [7:0] R:xx 2.3.12 CID_n(n:0-4) These are Custom ID registers. These regitsters contain user defined Custom ID identifiers for the FT TPM. Address Bit Addr. Reg. Name Description Sy,1Bh~1Fh 7:0 Application Version [7:0] R:xx 19 FocalTech Systems, Ltd. Confidential CTPM Application Note 3 CTPM Application Introduction 3.1 Standard Application information of FT5X06 Figure3-1,Figure3-2,Figure3-3 demonstrate the typical FT5x06 application schematic. It consists of FT’s Capacitive Touch Panel(CTP), FT5X06 chip, and some peripheral components. According to the size of CTPM, you can choose the numbers of TX and RX needed. 3.1.1 Standard application circuit of FT5206GE1 Figure 3-1 FT5206GE1 typical application schematic 20 FocalTech Systems, Ltd. Confidential CTPM Application Note 3.1.2 Standard application circuit of FT5306DE4 Figure 3-2 FT5306DE4 typical application schematic 21 FocalTech Systems, Ltd. Confidential CTPM Application Note 3.1.3 Standard application circuit of FT5206EE8 Figure 3-3 FT5406EE8 typical application schematic 4 Communication between host and CTPM 4.1 Communication Contents The data Host received from the CTPM through serial interface are different depend on the configuration in Device Mode Register of the CTPM. Please refer to Section 2---CTP Register Mapping. 22 FocalTech Systems, Ltd. Confidential CTPM Application Note 4.2 I2C Example Code ///////////////////////////////////////////////////////////////// // I2C write bytes to device. // // Arguments: ucSlaveAdr - slave address // ucSubAdr - sub address // pBuf - pointer of buffer // ucBufLen - length of buffer ///////////////////////////////////////////////////////////////// void i2cBurstWriteBytes(BYTE ucSlaveAdr, BYTE ucSubAdr, BYTE *pBuf, BYTE ucBufLen) { BYTE ucDummy; // loop dummy ucDummy = I2C_ACCESS_DUMMY_TIME; while(ucDummy--) { if (i2c_AccessStart(ucSlaveAdr, I2C_WRITE) == FALSE) continue; if (i2c_SendByte(ucSubAdr) == I2C_NON_ACKNOWLEDGE) // check non-acknowledge continue; while(ucBufLen--) // loop of writting data { i2c_SendByte(*pBuf); // send byte pBuf++; // next byte pointer } // while break; } // while i2c_Stop(); } ///////////////////////////////////////////////////////////////// // I2C read bytes from device. // // Arguments: ucSlaveAdr - slave address // ucSubAdr - sub address // pBuf - pointer of buffer // ucBufLen - length of buffer ///////////////////////////////////////////////////////////////// void i2cBurstReadBytes(BYTE ucSlaveAdr, BYTE ucSubAdr, BYTE *pBuf, BYTE ucBufLen) { BYTE ucDummy; // loop dummy ucDummy = I2C_ACCESS_DUMMY_TIME; while(ucDummy--) 23 FocalTech Systems, Ltd. Confidential CTPM Application Note { if (i2c_AccessStart(ucSlaveAdr, I2C_WRITE) == FALSE) continue; if (i2c_SendByte(ucSubAdr) == I2C_NON_ACKNOWLEDGE) // check non-acknowledge continue; if (i2c_AccessStart(ucSlaveAdr, I2C_READ) == FALSE) continue; while(ucBufLen--) // loop to burst read { *pBuf = i2c_ReceiveByte(ucBufLen); // receive byte pBuf++; // next byte pointer } // while break; } // while i2c_Stop(); } ///////////////////////////////////////////////////////////////// // I2C read current bytes from device. // // Arguments: ucSlaveAdr - slave address // pBuf - pointer of buffer // ucBufLen - length of buffer ///////////////////////////////////////////////////////////////// void i2cBurstCurrentBytes(BYTE ucSlaveAdr, BYTE *pBuf, BYTE ucBufLen) { BYTE ucDummy; // loop dummy ucDummy = I2C_ACCESS_DUMMY_TIME; while(ucDummy--) { if (i2c_AccessStart(ucSlaveAdr, I2C_READ) == FALSE) continue; while(ucBufLen--) // loop to burst read { *pBuf = i2c_ReceiveByte(ucBufLen); // receive byte pBuf++; // next byte pointer } // while break; } // while i2c_Stop(); } 24 FocalTech Systems, Ltd. 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