Microchip Technology maXTouch Curiosity Pro User manual

maXTouch Curiosity Pro Users Guide
Preface
The maXTouch® Curiosity Pro (AC320007) is an extension board to the Curiosity MCU kit family line and Atmel
Xplained Pro evaluation platform, which enables users to experiment with graphical user interface (GUI) applications
with maXTouch and LCD.
The figure below illustrates the maXTouch Curiosity Pro board.
© 2020 Microchip Technology Inc. DS70005414B-page 1

Table of Contents
Preface........................................................................................................................................................... 1
1. Introduction............................................................................................................................................. 3
1.1. Features....................................................................................................................................... 3
1.2. Kit Overview................................................................................................................................. 3
1.3. Additional Resources................................................................................................................... 3
2. Overview................................................................................................................................................. 4
2.1. maXTouch® Capacitive Touchscreen Controller.......................................................................... 4
2.2. maXTouch® Controller Interface...................................................................................................4
3. Getting Started........................................................................................................................................ 5
3.1. Connecting maXTouch Curiosity Pro to the Curiosity Board or Xplained Pro Board ...................5
4. Curiosity and Xplained Pro Boards......................................................................................................... 6
4.1. Curiosity Board or Xplained Pro Headers and Connectors.......................................................... 6
4.2. maXTouch Parallel LCD Extension Connector.............................................................................6
4.3. Hardware Connection at J2..........................................................................................................7
4.4. FPC or FFC Connector Pinout..................................................................................................... 7
4.5. maxTouch LCD Extension Header Implementation .....................................................................8
4.6. Interface Selector (SW1).............................................................................................................. 9
4.7. Debug Header.............................................................................................................................. 9
5. Specifications........................................................................................................................................ 11
6. Schematics............................................................................................................................................13
7. Mounting............................................................................................................................................... 14
8. Document Revision History...................................................................................................................15
The Microchip Website.................................................................................................................................16
Product Change Notification Service............................................................................................................16
Customer Support........................................................................................................................................ 16
Microchip Devices Code Protection Feature................................................................................................ 16
Legal Notice................................................................................................................................................. 16
Trademarks.................................................................................................................................................. 17
Quality Management System....................................................................................................................... 17
Worldwide Sales and Service.......................................................................................................................18
© 2020 Microchip Technology Inc. DS70005414B-page 2

1. Introduction
This section describes Microchip maXTouch Curiosity Pro features and overview of the maXTouch Curiosity Pro kit.
1.1 Features
The following are key features of the Microchip maXTouch Curiosity Pro board:
• Display
– 3.5 inch display module
– ILI9488 LCD driver
– 320 x 480 resolution
– 30 ms maximum response time
– White back light
– Parallel interface (up to 18 bit)
– Parallel RGB interface
– 3-wire and 4-wire SPI interface
• Touch
– maXTouch capacitive touch screen controller
– Supports up to 4 touches
• Cover panel
– 1.1 mm soda-lime glass
• Xplained Pro hardware identification system
Kit contents
• One 3.5 inch display module
• One 50-way flexible flat cable (FFC)
• One 20-way ribbon cable (also known as multi-wire planar cable)
1.2 Kit Overview
The Microchip maXTouch Curiosity Pro is an extension board for the Xplained Pro platform with a 320 x 480 RGB
LCD and a capacitive touch sensor with a maXTouch controller. The LCD can be controlled using different interfaces,
such as 3-wire and 4-wire SPI, Parallel, and RGB Parallel interface mode using the DIP switch to select the interface.
The maXTouch Curiosity Pro kit can be connected to any Curiosity boards or Xplained Pro standard extension
header, any curiosity Pro or Ultra kit, and many other Microchip MCUs using the 20-pin header, but is limited to 3-wire
and 4-wire SPI mode.
The maXTouch Curiosity Pro also features a standard LCD connector (FFC), which enables using the parallel
interfaces. Both connectors, FFC and 20-pin header, feature a SPI interface for the LCD and I2C for the maXTouch
device.
1.3 Additional Resources
For additional information, refer to these websites:
• ILI Technology Corp ILI9488 Driver IC (www.ilitek.com)
• Precision Design Associates (http://www.pdaatl.com/index.htm)
Introduction
© 2020 Microchip Technology Inc. DS70005414B-page 3

2. Overview
2.1 maXTouch® Capacitive Touchscreen Controller
The module touch screen interface is based on the Atmel maXTouch mXT336U Touch Controller and operates on the
touch sensor at connector J4. The touch controller scans the touch sensor and signals the host with an active-low
interrupt signal (~MXT_CHG on J2 & J3) when a new touch data is available. Data communication with the
maXTouch controller is performed over the I2C interface (on J2 & J3). The I2C address of the touch controller is fixed
at 0 x 4A, and is not configurable.
Note: The maXTouch has pull-up resistors on the I2C SCL (R17) and SDA (R16) lines. A pull-up resistor for the
maXTouch ~CHG interrupt signal is located at R18 (10k).
2.2 maXTouch® Controller Interface
Details of the maXTouch communication protocol are beyond the scope of this document. This module is pre-loaded
with a configuration already optimized for the maXTouch touch sensor and panel, hence the developer will 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 start with host interface development, users need to leverage the existing
code available from MPLAB® Harmony, which is available at https://www.microchip.com/mplab/mplab-harmony.
For additional information regarding the maXTouch devices, refer to http://www.microchip.com.
Overview
© 2020 Microchip Technology Inc. DS70005414B-page 4

3. Getting Started
This section covers getting started with Curiosity MCUs or Xplained Pro Quick Start.
Follow these steps to exploring the Microchip Curiosity Pro platform:
1. Download and launch MPLAB® X IDE.
2. Launch the plug-in manager and install MPLAB Harmony Code Configurator.
3. Connect the maXTouch Curiosity Pro to any Microchip Curiosity platform or Xplained Pro MCU board, and
connect a USB cable to the DEBUG USB port on the MCU board.
When the Curiosity MCU board or Xplained Pro MCU kit is connected to your computer for the first time, the
operating system will perform a driver software installation. The driver file supports 32-bit and 64-bit versions of
Microsoft® Windows® XP, Windows Vista®, Windows 7, Windows 8, and Windows 10.
After the Curiosity MCU board or Xplained Pro MCU board is powered, the green power LED will be lit and MPLAB X
IDE will auto detect which Curiosity MCU board or Xplained Pro MCU and extension boards are connected. MPLAB
X IDE will present relevant information, such as data sheets and kit documentation.
The target device is programmed and debugged by the on-board debugger, therefore no external programmer or
debugger tool is needed.
3.1 Connecting maXTouch Curiosity Pro to the Curiosity Board or Xplained Pro
Board
Microchip maXTouch Curiosity Pro is designed to connect to the Curiosity board or Xplained Pro header marked
EXTx (x = 1 - 3). Refer to the pin out of the Curiosity MCU board or Xplained Pro evaluation kit to find out which
Xplained Pro EXT headers can be used. The FFC connector can be used if the parallel interface from the MCU to the
display is used on the kits featuring the graphical user interface. Any time only one cable must be connected.
Getting Started
© 2020 Microchip Technology Inc. DS70005414B-page 5

4. Curiosity and Xplained Pro Boards
The Curiosity boards and Xplained Pro boards are evaluation platforms that provide a full Microchip microcontroller
experience to users. This platform consists of a series of microcontrollers and extension boards, which are integrated
with MPLAB X IDE, MPLAB Harmony drivers, demo code, support data streaming, and so on.
The Curiosity boards or Xplained Pro boards support a wide range of Xplained Pro extension boards, which are
connected through a set of standardized headers and connectors. Each extension board has an identification (ID)
chip to uniquely identify which boards are connected to a Curiosity board or Xplained Pro board. This information is
used to present relevant user guides, application notes, data sheets, and example code through MPLAB X IDE.
4.1 Curiosity Board or Xplained Pro Headers and Connectors
Table 4-1. Xplained Pro Standard Extension Header
Pin number Name Description
1 ID Communication line to the ID chip on an extension board
2 GND Ground
3 ADC(+) Analog-to-digital converter, alternatively positive part of differential ADC
4 ADC(-) Analog-to-digital converter, alternatively negative part of differential ADC
5 GPIO1 General purpose I/O
6 GPIO2 General purpose I/O
7 PWM(+) Pulse-width modulation, alternatively positive part of differential PWM
8 PWM(-) Pulse-width modulation, alternatively negative part of differential PWM
9 IRQ/GPIO Interrupt request line or general purpose I/O
10 SPI_SS_B/GPIO Slave select for SPI or general purpose I/O
11 I2C_SDA Data line for I2C interface. Always implemented, bus type.
12 I2C_SCL Clock line for I2C interface. Always implemented, bus type.
13 UART_RX Receiver line of target device UART
14 UART_TX Transmitter line of target device UART
15 SPI_SS_A Slave select for SPI. Should preferably be unique.
16 SPI_MOSI Master Out Slave In (MOSI) line of serial peripheral interface. Always
implemented, bus type
17 SPI_MISO Master In Slave Out (MISO) line of serial peripheral interface. Always
implemented, bus type.
18 SPI_SCK Clock for serial peripheral interface. Always implemented, bus type.
19 GND Ground
20 VCC Power for extension board
4.2 maXTouch Parallel LCD Extension Connector
The LCD connector can be connected to display extensions that have a parallel interface. The connector implements
signals for an MCU parallel bus interface and a LCD controller interface, as well as signals for a touch controller. For
connector pin-out definition, refer to maXTouch parallel LCD Connector.
Curiosity and Xplained Pro Boards
© 2020 Microchip Technology Inc. DS70005414B-page 6

Note: Usually only one display interface is implemented, either the LCD controller or the MCU bus interface. A FPC
or FFC connector with 50 pins and 0.5 mm pitch is used for the LCD connector.
4.3 Hardware Connection at J2
The FFC must be inserted with flex contacts facing down toward the PCB.
4.4 FPC or FFC Connector Pinout
Table 4-2. maXTouch Parallel LCD Connector
Pin Number Name RGB Interface Description MCU Description
1 ID Communication line to the ID chip on an extension board
2 GND Ground
3 D0 Data Line
4 D1 Data Line
5 D2 Data Line
6 D3 Data Line
7 GND Ground
8 D4 Data Line
9 D5 Data Line
10 D6 Data Line
11 D7 Data Line
12 GND Ground
13 D8 Data Line
14 D9 Data Line
15 D10 Data Line
16 D11 Data Line
17 GND Ground
18 D12 Data Line
19 D13 Data Line
20 D14 Data Line
21 D15 Data Line
22 GND Ground
23 D16 Data Line
24 D17 Data Line
25 D18 Data Line
26 D19 Data Line
27 GND Ground
28 D20 Data Line
Curiosity and Xplained Pro Boards
© 2020 Microchip Technology Inc. DS70005414B-page 7

29 D21 Data Line
30 D22 Data Line
31 D23 Data Line
32 GND Ground
33 PCLK/CMD DATASEL Pixel clock Display RAM select. One address line of the
MCU for display where it is possible to select
either register or data interface
34 VSYNC/CS Vertical Synchronization Chip select
35 HSYNC/WE Horizontal Synchronization Write-enable signal
36 DATA ENABLE/RE Data-enable signal Read-enable signal
37 SPI SCK Clock for serial peripheral interface
38 SPI MOSI Master Out Slave In (MOSI) of serial peripheral interface
39 SPI MISO Master In Slave Out (MISO) of serial peripheral interface
40 SPI SS Slave select for serial peripheral interface (SPI). Preferably a dedicated pin.
41 ENABLE Display enable
42 I2C_SDA Data line for I2C interface. Always implemented, bus type.
43 I2C_SCL Clock line for I2C interface. Always implemented, bus type.
44 IRQ1 Interrupt
45 IRQ2 Interrupt
46 PWM Back light control
47 RESET Extension reset
48 VCC 3.3V power supply for extension board
49 VCC 3.3V power supply for extension board
50 GND Ground
4.5 maxTouch LCD Extension Header Implementation
The following table provides the signals used by the maXTouch LCD.
Table 4-3. Signals Used by the maXTouch LCD
Pin number Name Description
1 ID Communication line to the ID chip on an extension board
2 GND Ground
3 NC Not connected
4 NC Not connected
5 GPIO1 General purpose I/O
6 NC Not connected
7 PWM(+) Pulse-width modulation, alternatively positive part of differential PWM
8 NC Not connected
Curiosity and Xplained Pro Boards
© 2020 Microchip Technology Inc. DS70005414B-page 8

...........continued
Pin number Name Description
9 IRQ/GPIO Interrupt request line or general purpose I/O
10 SPI_SS_B/GPIO Slave select for SPI or general purpose I/O
11 I2C_SDA Data line for I2C interface. Always implemented, bus type.
12 I2C_SCL Clock line for I2C interface. Always implemented, bus type.
13 NC Not connected
14 NC Not connected
15 SPI_SS_A Slave select for SPI. must preferably be unique.
16 SPI_MOSI Master Out Slave In (MOSI) line of serial peripheral interface. Always
implemented, bus type
17 SPI_MISO Master In Slave Out line (MISO) of serial peripheral interface. Always
implemented, bus type.
18 SPI_SCK Clock for serial peripheral interface. Always implemented, bus type.
19 GND Ground
20 VCC Power for extension board
4.6 Interface Selector (SW1)
The maXTouch Pro LCD has a series of selector switches to control the mode the ILI9844 controller operates in.
These switches can be found on the back of the LCD. The table below details how the switches change the mode.
and the switch settings have to match the software that is loaded on the host microcontroller.
IM2 IM1 IM0 Interface Pins in use
0 0 0 18-bit parallel bus DB[17:0], CS, D/C, WE, RE
0 0 1 9-bit parallel bus DB[8:0], CS, D/C, WE, RE
0 1 0 16-bit parallel bus DB[15:0], CS, D/C, WE, RE
0 1 1 8-bit parallel bus DB[7:0], CS, D/C, WE, RE
1 0 0 Not Supported
1 0 1 3-wire/9-bit SPI mode MOSI, MISO, SCLK, CS,
1 1 0 Not Supported
1 1 1 4-wire/8-bit SPI mode MOSI, MISO, SCLK, CS, D/C
4.7 Debug Header
Extra debug connections of the maXTouch controller is provided for easy access.
Pin Number Pin Name Pin Description
1 NC No connect
2 NC No connect
3 IRQ Interrupt (maXTouch) Active-Low
4 Reset Reset (maxTouch) Active-Low
Curiosity and Xplained Pro Boards
© 2020 Microchip Technology Inc. DS70005414B-page 9

...........continued
Pin Number Pin Name Pin Description
5 I2C_SDA Data line for I2C interface. Always implemented, bus type.
6 I2C_SCL Clock line for I2C interface. Always implemented, bus type.
7 VCC 3.3V power supply for extension board
8 GND Ground
9 Debug Data Debug output
10 Debug Clock Debug clock
Curiosity and Xplained Pro Boards
© 2020 Microchip Technology Inc. DS70005414B-page 10