90-00036-A0

Features • Complete Touchscreen Module: • • • • – Projected Capacitive Multi Touch Controller – 7in LCD – 4 Capacitive “Navigation” Keys – 200 bytes non-volatile serial EEPROM Touch: – Atmel maXTouch™ mXT768E Touch Controller – Supports up to 10 touches Display: – 800x480 resolution – ≤30 ms response time – White LED backlight – 18-bit RGB Navigation Keys: – Atmel AT42QT1070 QTouch™ Button Sensor IC Cover Panel: – 1.1mm Soda Lime Glass PDA TM7000: 7in PCAP Touch Module 1404-3-5 TM7000 Visit http://www.pdaatl.com/tm7000 for the latest information on the TM7000   Contents 1 2 Module Overview 1.1 PCB Connections 4 1.2 Debug Connector J1 5 1.3 LCD Backlight Power J2 5 1.4 Host Connector J4 6 1.5 Host Connector J5 7 1.6 Host Interface (Combined) J6 8 1.7 Display Flex Connector J8 9 1.8 Touch Sensor Flex Connector J7 Overview of the 7in PCAP Touch Module 11 2.2 Understanding Unfamiliar Concepts 12 2.3 LCD Panel 12 2.3.1 Scan Direction Selection 12 2.3.2 RGB Signal Routing 13 maXTouch Capacitive Touchscreen Controller 2.5 2.5.1 2.6 5  2 11 Introduction 2.4.1 4 10 2.1 2.4 3 4 14 maXTouch Controller Interface 15 QTouch Capacitive Button Controller 15 QTouch Controller Interface Serial EEPROM Getting Started 15 15 16 3.1 Hardware Connections 16 3.2 Software 16 3.3 Using the Touch Module 16 3.3.1 Navigation Keys 16 3.3.2 Evaluating the Touch Module 17 Specifications 18 4.1 Mechanical Specifications 18 4.2 Absolute Maximum Specifications 20 4.3 Recommended Operating Conditions 20 4.4 DC Specifications 20 4.5 I2C-compatible Bus Specifications 21 4.6 Power Consumption 21 4.7 Part Number 21 I2C Basics (I2C-compatible Operation) PDA TM7000: 7in PCAP Touch Module 22 1404-3-5 PDA TM7000: 7in PCAP Touch Module 5.1 Interface Bus 22 5.2 Transferring Data Bits 22 5.3 START and STOP Conditions 22 5.4 Address Byte Format 23 5.5 Data Byte Format 23 5.6 Combining Address and Data Bytes into a Transmission 24 6 Revision History 25 7 Notes 26   3 1 Module Overview 1.1 PCB Connections J2 J1 J4 D S24B 33 Combined Host Host Pin 1 LCD Power Debug J6 J5 Pin 1 J7 Touch J8 Pin 1 Pin 1 Pin 1 Host MXT768E Pin 1 Display Flex Sensor Flex Figure 1 - PCB Connectors NOTE: Insert flex in Connector J6 with contacts facing DOWN. The following notations are used for pin descriptions: I Input only O Output only, push-pull MXT EE maXTouch touchscreen Serial EEPROM OD Open drain output P Ground or power QT LCD QTouch Button Controller LCD Panel NOTE: Inputs and output are defined from the standpoint of the Touch Module.  4 PDA TM7000: 7in PCAP Touch Module 1404-3-5 PDA TM7000: 7in PCAP Touch Module 1.2 Debug Connector J1 1 P +5Vdc 2 O ~QT_CHG 3 O ~MXT_CHG 4 - N/C 5 I 2 I C SDA     Pin Type Description 2 QT Description MXT Type QT Pin MXT Connector J1 carries signals used to debug the MaXTouch Touch Controller and QTouch Button Controller.   6 I/O I C SCL 7 - N/C 8 P GND 9 O DBG DATA  10 O DBG CLK  1.3 LCD Backlight Power J2 Connector J2 is used to provide +5Vdc system and LCD backlight power to the touch module when the Connector J6 host interface is being used. The host interface on connector J6 only provides +3.3Vdc system power. By contrast, when the TM7000 is connected to the host via connectors J4 and J5, system power and LCD backlight power is provided through those interfaces. NOTE: J2 should NOT be used when J4 and J5 are in use. The mating connector for J2 is a 2.1mm I.D x 5.5mm O.D barrel connector (center positive). rated for 1A minimum should connected to J2. A +5Vdc supply Suggested power supplies: - Phihong PSC12R-050, (+5Vdc, 2A) - Phihong PSAC05R-050(P), (+5Vdc, 1A)   5 1.4 Host Connector J4 Connector J4 connects to the host and carries signals between the host and (1) the MaXTouch Touch Controller, (2) the QTouch Button Controller and (3) LCD Panel. NOTE: J4 (and J5) should not be used when J6 is in use.  6 Type 16 I LCD_DATA_12 2 P GND 17 P GND 3 P +3.3Vdc 18 I LCD_DATA_0  4 5 P GND 19 I LCD_DATA_1  O ~MXT_CHG 20 I LCD_DATA_2 6 O ~QT_CHG   21 I LCD_DATA_3  2    7 I I C SCL   22 I LCD_DATA_4  8 I/O I2C SDA   23 I LCD_DATA_5  9 P GND 24 I LCD_DATA_6  10 I LCD_DATA_15 25 I LCD_DATA_7  11 P GND 26 I LCD_DATA_8  12 I LCD_DATA_13 27 I LCD_DATA_9  13 P GND 28 I LCD_DATA_10  14 I LCD_DATA_14 29 I LCD_DATA_11  15 P GND 30 P GND    PDA TM7000: 7in PCAP Touch Module EE Pin QT +3.3Vdc LCD P Description MXT 1 EE Description QT Type LCD Pin MXT J2 should not be used when J4 (and J5) are in use. 1404-3-5 PDA TM7000: 7in PCAP Touch Module 1.5 Host Connector J5 Connector J5 connects to the host and carries signals between the host and (1) the LCD Panel and (2) serial EEPROM. NOTE: J5 (and J4) should not be used when J6 is in use. +5Vdc 21 P GND P GND 22 P GND 3 P +5Vdc 23 - N/C 4 P GND 24 - N/C 5 I LCD_DATA_16  25 - N/C 6 I LCD_DATA_17  26 - N/C 7 I LCD_DATA_18  27 - N/C 8 I LCD_DATA_19  28 I/O 9 I LCD_DATA_20  29 P GND 10 I LCD_DATA_21  30 P GND 11 I LCD_DATA_22  31 - N/C 12 I LCD_DATA_23  32 - N/C 13 P GND 33 - N/C 14 P GND 34 - N/C 15 I DISP (Display Enable)  35 - N/C 16 I Backlight PWM  36 O Module Presence Detect 17 I VSYNC  37 - N/C – See Note 1 18 I HSYNC  38 - N/C 19 I DE  39 P GND 20 I PCLK  40 P GND One-Wire Interface EE 2 Description QT Type LCD Pin MXT P EE 1 Description QT Type LCD Pin MXT J2 should not be used when J5 (and J4) are in use.  Note 1: by populating R5, the touch module’s ~RESET signal is accessible at this pin.   7 1.6 Host Interface (Combined) J6 Connector J6 connects to the host and carries the combined signals of J4 and J5. It provides an alternate interface between the host and (1) the MaXTouch Touch Controller, (2) the QTouch Button Controller, (3) LCD Panel, and (4) serial EEPROM. When the host interface on connector J6 is used, +5Vdc system power must be provided using Connector J2. See Section 1.3 for details. Suggested Flex: Manufacturer P/N: Wurth Electronics #687 650 100 002 Description: 0.5mm pitch 50 position FFC, Length 100mm Flex should be inserted Connector J6 with contacts facing DOWN.  8 Type  26 I LCD_DATA_19 27 P GND  28 I LCD_DATA_20  LCD_DATA_1  29 I LCD_DATA_21  I LCD_DATA_2  30 I LCD_DATA_22  I LCD_DATA_3  31 I LCD_DATA_23  7 P GND 32 P GND 8 I LCD_DATA_4  33 I PCLK  Type Description 1 I/O 2 P GND 3 I LCD_DATA_0 4 I 5 6 One-Wire Interface Description  9 I LCD_DATA_5  34 I VSYNC  10 I LCD_DATA_6  35 I HSYNC  11 I LCD_DATA_7  36 I DE  12 P GND 37 - N/C 13 I LCD_DATA_8  38 - N/C 14 I LCD_DATA_9  39 - N/C 15 I LCD_DATA_10  40 - N/C 16 I LCD_DATA_11  41 I DISP 17 P GND 42 I I2C SDA   18 I LCD_DATA_12  43 I/O I2C SCL   19 I LCD_DATA_13  44 O ~MXT_CHG  20 I LCD_DATA_14  45 O ~QT_CHG 21 I LCD_DATA_15  46 I LCD_PWM 22 P GND 47 I ~RESET 23 I LCD_DATA_16  48 P +3.3Vdc 24 I LCD_DATA_17  49 P +3.3Vdc 25 I LCD_DATA_18  50 P GND PDA TM7000: 7in PCAP Touch Module EE Pin Pin QT LCD MXT EE QT LCD MXT NOTE: J6 should not be used when J4 and J5 are in use.      1404-3-5 PDA TM7000: 7in PCAP Touch Module 1.7 Display Flex Connector J8 Connector J8 connects to the LCD panel flex and carries signals between the host and the LCD Panel. Pin Type 1 O 2 3 4 Description Pin Type Description U/D 21 P GND O L/R 22 O B0 P GND 23 O B1 O PCLK 24 O B2 5 P GND 25 P GND 6 O R0 26 O B3 7 O R1 27 O B4 8 O R2 28 O B5 9 P GND 29 P GND 10 O R3 30 O HSYNC 11 O R4 31 O VSYNC 12 O R5 32 O DE 13 P GND 33 O MODE 14 O G0 34 P +3.3Vdc 15 O G1 35 P +3.3Vdc 16 O G2 36 P LED- 17 P GND 37 P LED- 18 O G3 38 O LCD_PWM 19 O G4 39 P LED+ 20 O G5 40 P LED+   9 1.8 Touch Sensor Flex Connector J7 Connector J7 connects to the touch sensor flex and carries signals used by the maXTouch controller to detect user input on the touch sensor.  10 Pin Type 1 P 2 3 Description Pin Type Description GND 29 I/O Y7 I/O X0 30 I/O Y8 I/O X1 31 I/O Y9 4 I/O X2 32 I/O Y10 5 I/O X3 33 I/O Y11 6 I/O X4 34 I/O Y12 7 I/O X5 35 I/O Y13 8 I/O X6 36 I/O Y14 9 I/O X7 37 I/O Y15 10 I/O X8 38 I/O Y16 11 I/O X9 39 I/O Y17 12 I/O X10 40 I/O Y18 13 I/O X11 41 I/O Y19 14 I/O X12 42 I/O Y20 15 I/O X13 43 I/O Y21 16 I/O X14 44 I/O Y22 17 I/O X15 45 I/O Y23 18 I/O X16 46 I/O Y24 19 I/O X17 47 I/O Y25 20 I/O X18 48 I/O Y26 21 P GND 49 I/O Y27 22 I/O Y0 50 I/O Y28 23 I/O Y1 51 I/O Y29 24 I/O Y2 52 I/O Y30 25 I/O Y3 53 I/O Y31 26 I/O Y4 54 P GND 27 I/O Y5 55 P GND 28 I/O Y6 PDA TM7000: 7in PCAP Touch Module 1404-3-5 PDA TM7000: 7in PCAP Touch Module 2 Overview of the 7in PCAP Touch Module 2.1 Introduction The 7in PCAP Touch Module is a touchscreen module offering best-in-class projected capacitance multi-touch functionality combined with a 7in LCD panel. The module is configured for development and evaluation with several Atmel ARM-based EK solutions as well as development and integration with a custom host system. For convenience, this module features host interface connectors (J4 and J5) positioned for direct installation on Atmel ARM-based EK boards. As shown in Figure 2 below, the module provides host access to several sub-system components to maximize effective integration. TM7000 - Touch Module PCB Nav Keys J7 J6 QT1070 J5 Capacitive Button Controller mXT768E Capacitive Touchscreen Controller J8 LCD Panel J4 Touch sensor HOST DS24B33 Serial EEPROM Figure 2 - Functional Block Diagram   11 2.2 Understanding Unfamiliar Concepts Throughout this document, the functionality of the module sub-system will be outlined and summarized. However, the user is encouraged to refer to the resources and documents below in order to gain a more thorough understanding of each sub-system. • For a basic overview of I2C communication, refer to Section 5 of this document • Atmel maXTouch mXT768E Datasheet (www.atmel.com) • Atmel QTouch QT1070 Datasheet (www.atmel.com) • Maxim DS24B33 Datasheet (www.maximintegrated.com) In addition, when developing or evaluating with the Atmel ARM-based EK’s, it is recommended that the user visit www.at91.com which contains a broad range of resources for the EK’s and the ARM devices they feature. 2.3 LCD Panel The module provides the host with a direct connection from the host (Connector J6 or Connectors J4 and J5) to the LCD panel interface (Connector J8). Aside from generating supply voltages for the LED backlight and providing backlight control to the host, no display panel control is performed by the module. 2.3.1 Scan Direction Selection The touch module provides a means for configuring the scan direction of the LCD by populating resistors indicated in Figure 3 below. J6 J5 J8 Figure 3 – LCD Scan Direction Configuration Resistors The LCD panel Up/Down scanning direction is configured by populating R69 and R65 as shown in Table 2-1 below. The LCD panel Left/Right scanning direction is configured by populating R70 and R69 as shown in Table 2-2 below. Table 2-1 - LCD Up/Down Scanning Selection R69 0Ω DNP R65 DNP 0Ω Direction Up Down Note: Factory setting is scanning “Down”  12 PDA TM7000: 7in PCAP Touch Module 1404-3-5 PDA TM7000: 7in PCAP Touch Module Table 2-2 - LCD Left/Right Scanning Selection R70 0Ω DNP R66 DNP 0Ω Direction Right Left Note: Factory setting is scanning “Right” 2.3.2 RGB Signal Routing To support use with multiple host EK options, the touch module provides a means for selecting the routing of LCD_DAT_xx signals to the LCD RGB data signals by populating one of the two groups of resistors indicated in Figure 4 below. J6 J5 J8 Figure 4 – RGB Signal Routing Configuration Resistors Populating resistors R46-R63 selects the Atmel “Series-5 / A5D3x” routing scheme. Populating resistors R27-R44 selects the Atmel “Islero” routing scheme. The PCB ships with R46-R63 populated – selecting the “Series-5 / A5D3x” scheme by default. Details of each scheme are shown in Table 2-3 below.   13 Table 2-3 – RGB Signal Routing Selection Series 5/A5D3x (R46 – R63) LCD_DAT_17 LCD_DAT_16 LCD_DAT_15 LCD_DAT_14 LCD_DAT_13 LCD_DAT_12 LCD_DAT_11 LCD_DAT_10 LCD_DAT_9 LCD_DAT_8 LCD_DAT_7 LCD_DAT_6 LCD_DAT_5 LCD_DAT_4 LCD_DAT_3 LCD_DAT_2 LCD_DAT_1 LCD_DAT_0 Islero (R27 - R44) LCD_DAT_23 LCD_DAT_22 LCD_DAT_21 LCD_DAT_20 LCD_DAT_19 LCD_DAT_18 LCD_DAT_15 LCD_DAT_14 LCD_DAT_13 LCD_DAT_12 LCD_DAT_11 LCD_DAT_10 LCD_DAT_7 LCD_DAT_6 LCD_DAT_5 LCD_DAT_4 LCD_DAT_3 LCD_DAT_2 LCM R5 R4 R3 R2 R1 R0 G5 G4 G3 G2 G1 G0 B5 B4 B3 B2 B1 B0 Note: Factory setting is “Series 5/A5D3x” 2.4 maXTouch Capacitive Touchscreen Controller The module touch screen interface is based on the Atmel maXTouch mXT768E Touch Controller and operates using the touch sensor at connector J7. The touch controller scans the touch sensor and will signal the host with an active low interrupt signal (~MXT_CHG on J4 or J6) when new touch data is available. Data communication with the maXTouch controller is performed over a shared I2C interface (I2C SCL and I2C SDA on J4 or J6). The I2C address of the touch controller can be configured by populating R12 or R13 (shown below in Figure 5) according to Table 2-4 below. The PCB ships with R12 populated – thus the I2C address is set to 0x4C by default. NOTE: The TM7000 does not have pull-up resistors on the I2C SCL and SDA lines. A pull-up resistor for the maXTouch ~CHG interrupt signal is located at R14. J4 Figure 5 - Touch Controller I2C Address Selection  14 PDA TM7000: 7in PCAP Touch Module 1404-3-5 PDA TM7000: 7in PCAP Touch Module Table 2-4 - Touch Controller I2C Address Selection R12 0Ω DNP R13 DNP 0Ω I2C Address 0x4C 0x4D Note: 0x4C is the default I2C address 2.4.1 maXTouch Controller Interface Details of the maXTouch communication protocol are beyond the scope of this document. provided in Section 3.2 below to facilitate evaluation and initial development. However information is This module is pre-loaded with a configuration already optimized for this touch sensor and panel, so the developer need only focus on interfacing with the device. When developing the maXTouch controller interface during evaluation and host development, care should be taken to avoid changing the maXTouch configuration or committing changes to NV storage on the maXTouch controller. To get started with host interface development, the user is strongly encouraged to leverage existing code available from the resources outlined in Sections 3.2. 2.5 QTouch Capacitive Button Controller The module’s “nav key” interface is based on the Atmel QT1070 7-Channel Capacitive Sensor Driver. The button controller scans the 4 capacitive nav keys (K1, K2, K3 and K4) and will signal the host with an active low interrupt signal (~QT_CHG on Connector J4 or J6) when a touch event has occurred. Data communication with the QT1070 controller is performed over a shared I2C interface (I2C SCL and I2C SDA on J4 or J6). The I2C address of the button controller is 0x1B and cannot be changed. NOTE: The TM7000 does not have pull-up resistors on the I2C SCL and SDA lines. A pull-up resistor for the QTouch ~CHG interrupt signal is located at R16. 2.5.1 QTouch Controller Interface Details of the QTouch communication protocol are beyond the scope of this document. to review the QT1070 Datasheet (www.atmel.com). The user is encouraged 2.6 Serial EEPROM The module includes a DS24B33 Serial EEPROM providing 512 bytes of non-volatile storage. Data communication with the EEPROM is performed over a One-Wire Interface. The EEPROM is not used by another subsystem on the touch module and can be freely used by the host system for any purpose. For example, Atmel ARM-based EK’s running Linux or Android operating systems use the pre-programmed contents of the EEPROM to identify this module type. NOTE: The user should take care if choosing to overwrite the pre-programmed EEPROM contents. As noted above, certain builds of Linux or Android targeted for the Atmel ARM-based EKs use the EEPROM contents to identify the module and may no longer recognize the module. The user is advised to backup the EEPROM contents before overwriting. The serial EEPROM communicates via a one-wire interface (One-wire Interface on J5 or J6). Refer to the DS24B33 Datasheet (www.maximintegrated.com) for details.   15 3 Getting Started This module was designed to install on a variety of Atmel ARM-based EK’s including the SAM9X5-EK, SAM9N12-EK, SAMA5D3x-EK and the SAMA5D3 Xplained. This provides the fastest way to evaluate the performance of the touchscreen and display using a familiar, full-featured OS. The following sections provide basic information related to using and evaluating the Touch Module. Visit Precision Design Associates website ( www.pdaatl.com ) or Atmel’s AT91 Community website ( www.at91.com ) for more information related to this touch module or guidance appropriate for your specific EK. 3.1 Hardware Connections The module interfaces with the EK board via one of two methods depending on the EK: the two large dual-row headers, J4 and J5 the flex connector, J6 Refer to the specific EK documentation to determine which method is appropriate. 3.2 Software Several options exist when developing for the touch module whether targeting a custom host or an Atmel EK. 3.2.1.1 Atmel Software Framework The Atmel Software Framework (asf.atmel.com) contains examples of code for interfacing with devices in the maXTouch family of touch controllers. The capabilities of various maXTouch devices may differ, but the basic communication protocol is common and can be applied to this module. 3.2.1.2 Linux Kernel / Android The Linux Kernel (www.kernel.org) has included basic support for maXTouch touch devices since version 2.6.36. The mainline driver has undergone considerable evolution since then. Atmel hosts the AT91 community website with resources dedicated to developing their EKs for Android ( www.at91.com/android4sam/ ) and Linux ( www.at91.com/linux4sam/ ) In addition, Atmel maintains patches (www.github.com/atmel-maxtouch/linux) which provide numerous out-of-cycle improvements to the mainline Linux Kernel driver. 3.3 Using the Touch Module 3.3.1 Navigation Keys When using this module with one of the standard Atmel Android demo builds, the navigation keys function as shown in Table 3-1 below:  16 PDA TM7000: 7in PCAP Touch Module 1404-3-5 PDA TM7000: 7in PCAP Touch Module Table 3-1 - Navigation Key Function (Android) Key K1 K2 K3 K4 Navigation Function Back Menu Home Power / Sleep 3.3.2 Evaluating the Touch Module For effective evaluation of the module – the touch sensor and the LCD panel in particular – the user is encouraged to try the following applications and tools depending on the host OS. 3.3.2.1 Android The following Android apps available from Google Play: TouchTest by Moonblink Dotty by Gerry Steele Multitouch Visible Test by Battery Powered Games Screen Test by Amberfog 3.3.2.2 Linux The user can perform simple touch / drawing test using the ts_test utility that is part of tslib.   17 4 Specifications For complete specifications, refer to the datasheets listed in section 2.2 for the various sub-system components outlined in sections 2.3 through 2.6. 4.1 Mechanical Specifications Drawings and CAD models available upon request. 166.55±0.15mm (Substrate Outline) 1.1 mm (Cover Panel) X18,Y0 X18,Y31 X0,Y31 54.7 mm (Sensor Substrate to FPC Edge) Glass Profile 178mm x 117mm R3.75mm in corners 107.02±0.15mm (Substrate Outline) 91.44 mm (LCD Active) 12 mm (Cover Panel Edge to Backprint Viewable) X0,Y0 93 mm (Backprint Viewable) 12 mm (Cover Panel Edge to Backprint Viewable) User side 152.4 mm (LCD Active) LCD side 0.45 mm (Sensor + Optically Clear Adhesive) 154 mm (Backprint Viewable) Viewed from user side 28 mm (FPC Min Width) 0.08 mm (FPC) PIN 1 NOTE: PCB Contacts face DOWN as drawn PIN 55 50.4 mm (FPC Max Width) Figure 6 - Sensor Only Dimensions Sensor Assy (P/N: 90-00020-A0) may be purchased individually. Minimum order quantities apply. Contact PDA for details.  18 PDA TM7000: 7in PCAP Touch Module 1404-3-5 PDA TM7000: 7in PCAP Touch Module 134.6 mm (PCB Length) Glass Profile 178mm x 117mm R3.75mm in corners 104 mm (LCM Frame Width) 50 mm MXT768E 63.5 mm (PCB Width) DS 24B33 13.5mm 22 mm 9.3 mm (Cover Panel rear surface to PCB rear surface) 6.6 mm (Cover Panel rear surface to LCM rear surface) 104 mm (LCM Frame Length) Figure 7 – Module Dimensions   19 4.2 Absolute Maximum Specifications Parameter Value Operating temp 0oC to + 70oC Storage temp -40oC to + 85oC Vdd -0.5 to +6V Max continuous pin current, any control or drive pin ±40 mA Voltage forced onto any pin -0.5V to (Vdd + 0.5) Volts CAUTION: Stresses beyond those listed under Absolute Maximum Specifications may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification are not implied. Exposure to absolute maximum specification conditions for extended periods may affect device reliability. 4.3 Recommended Operating Conditions Parameter Value Vin 5.0V ±5 percent Supply ripple + noise ±20 mV 4.4 DC Specifications Vin = 5.0V, Vdd=3.3Vdc, Ta = recommended range, unless otherwise noted Parameter Min Typ Max Units Notes VIL Low input logic level - 0.5 – 0.3 Vdd V 1.8V