Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsLinear ICsLinear-IC

 2012 Microchip Technology Inc. DS41663A-page 1

Description

The MTCH6301 is a turnkey projected capacitive con-

troller that allows easy integration of multi-touch and

gestures to create a rich user interface in your design.

Through a sophisticated combination of Self and

Mutual Capacitive scanning for both XY screens and

touch pads, the MTCH6301 allows designers to quickly

and easily integrate projected capacitive touch into

their application.

Applications:

• Human-machine interfaces with configurable

button, keypad or scrolling functions

• Single-finger gesture based interfaces to swipe,

scroll, or doubletap controls

• Home automation control panels

• Security control keypads

• Automotive center stack controls

• Gaming devices

• Remote control touch pads

Touch Sensor Support

• Up to 13RX x 18TX channels

• Works with printed circuit board (PCB), film, glass,

and flexible circuit board (FPC) sensors

• Supports sensor sizes up to 4.3”

• Individual channel tuning for optimal sensitivity

• Cover layer support:

- Plastic: up to 3 mm

- Glass: up to 5 mm

Touch Performance

• >100 reports per second single touch

• >60 reports per second dual touch

• Up to 12-bit resolution coordinate reporting

Touch Features

• Multitouch (up to 10 touches)

• Gesture detection and reporting

• Single and dual touch drawing

• Self and Mutual signal acquisition

• Built-in noise detection and filtering

Power Management

• Configurable Sleep mode

• Integrated Power-on Reset and Brown-out Reset

• 20 µA sleep current (typical)

Communication Interface

•I

C™ (up to 400 kbps)

Operating Conditions

• 2.4V to 3.6V, -40ºC to +105ºC

Package Types

• 44-Lead TQFP

• 44-Lead QFN

MTCH6301 PROJECTED CAPACITIVE

TOUCH CONTROLLER

MTCH6301 Projected Capacitive Touch Controller

Summary of content (32 pages)

PAGE 1
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER MTCH6301 Projected Capacitive Touch Controller Description Touch Features The MTCH6301 is a turnkey projected capacitive controller that allows easy integration of multi-touch and gestures to create a rich user interface in your design. Through a sophisticated combination of Self and Mutual Capacitive scanning for both XY screens and touch pads, the MTCH6301 allows designers to quickly and easily integrate projected capacitive touch into their application.
PAGE 2
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER Table of Contents 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 System Block Diagram ................................................................................................................................................................. 3 Configuration and Setup............................................................................................................................................................... 3 Pin Diagram........................
PAGE 3
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 1.0 The Projected Capacitive Configuration Utility with an autotune feature allows fast customization for different sizes and top layer thicknesses. SYSTEM BLOCK DIAGRAM The MTCH6301 is a turnkey projected capacitive touch controller that allows easy integration of multitouch and gestures to create a rich user interface in your design.
PAGE 4
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 3.0 PIN DIAGRAM FIGURE 3-1: PIN DIAGRAM 44-Pin TQFP(1,2) 44 43 42 41 40 39 38 37 36 35 34 SCL TX11 TX10 TX9 VDD VSS TX5 TX6 TX7 TX8 TX4 44-Pin QFN(1,2) 1 2 3 4 5 6 7 8 9 10 11 MTCH6301 MTCH6301 33 32 31 30 29 28 27 26 25 24 23 TX0 TX1 TX2 TX3 VSS VDD RX0 RX1 RX2 RX3 RX4 TX13 TX12 RX10 RX9 VSS VDD RESET RX8 RX7 RX6 RX5 12 13 14 15 16 17 18 19 20 21 22 SDA TX17 TX16 TX15 TX14 VSS VCAP INT N/C RX12 RX11 Note 1: All RX/TX are remappable.
PAGE 5
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER TABLE 3-1: Pin Name PINOUT I/O DESCRIPTIONS Pin Number Pin Type Description RESET 18 I/P SCL 44 I SDA 1 I/O Synchronous serial data input/output for I2C INT 8 O Interrupt (from MTCH6301 to master) for I2C RX0 27 I/O RX1 26 I/O RX2 25 I/O RX3 24 I/O RX4 23 I/O RX5 22 I/O RX6 21 I/O RX7 20 I/O RX8 19 I/O RX9 15 I/O RX10 14 I/O RX11 11 I/O RX12 10 I/O TX0 33 O TX1 32 O TX2 31 O TX3 30 O TX4 34
PAGE 6
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 4.0 LAYOUT 4.1 Typical Application Circuit The following schematic portrays a typical application circuit, based on a 12RX/9TX touch sensor. FIGURE 4-1: TYPICAL APPLICATION CIRCUIT MICROCHIP PICkit™ Serial Analyzer Master I2C™ Controller MTCH6301 TX0 TX1 TX2 TX3 VSS VDD RX0 RX1 RX2 RX3 RX4 33 32 31 30 29 28 27 26 25 24 23 0.
PAGE 7
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 4.3.3 TABLE 4-1: PIN MAP ID CHART Pin Map ID (TX) Map ID (RX) RX0 27 8 RX1 26 7 RX2 25 6 RX3 12 5 RX4 11 4 RX5 10 3 RX6 9 2 RX7 1 1 RX8 0 0 RX9 24 9 RX10 23 10 Scaling coefficient registers exist in RAM for each axis (RX/TX) and must be modified in accordance with the number of channels that are in use.
PAGE 8
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER REGISTER 4-1: FLIPSTATE REGISTER U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-1 — — — — — SWAP TXFLIP RXFLIP bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared bit 7-3 Unimplemented: Read as ‘0’ bit 2 SWAP 1 = RX axis horizontal; TX axis vertical 0 = RX axis vertical; TX axis horizontal bit 1 TXFLIP 1 = Invert the TX axis 0 = Do not invert the TX
PAGE 9
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 4.4 Example Custom Application Layout An example 4-channel RX/11-channel TX sensor is shown in Figure 4-3. In addition to using a completely modified pin layout, this example differs from the default configuration by also having the TX axis along the bottom (X) and RX axis along the side (Y). Note that some RX pins are used as TX lines in this example.
PAGE 10
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 5.0 5.1 COMMUNICATION PROTOCOL Command Protocol Overview All other commands are invoked by the I2C master controller. Commands are used for configuring and controlling the device. The MTCH6301 has two basic communication types: Touch & Gesture Protocol, and Command Protocol. Master Read Details Please note that any read from the controller by the master, including both touch & gesture protocol and command protocol, will be prefixed by a single byte.
PAGE 11
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER TABLE 5-2: Packet GESTURE PROTOCOL Bit 7 0 1 1 0 Legend: 5.
PAGE 12
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 5.5 Command Protocol Figure 5-2 depicts bidirectional communication protocol (for reading/writing configuration data). FIGURE 5-2: COMMAND PROTOCOL Command (from Master): 0x55 [size] [cmd] Data 0 Response (from MTCH6301): 0x55 [size] [res] [cmd] 5.6 ...
PAGE 13
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER FIGURE 5-3: WRITE REGISTER COMMAND 0x55 0x04 0x15 [D0] [D1] [D2] 0x55 Master Command 0x02 0x00 0x15 Controller Response D0 = Index Location D1 = Offset Location D2 = Value to Write to Specified Register FIGURE 5-4: READ REGISTER COMMAND 0x55 0x03 0x16 [D0] [D1] 0x55 0x03 Master Command 0x00 0x16 [D2] Controller Response D0 = Index Location D1 = Offset Location D2 = Read Value at Specified Register 5.6.
PAGE 14
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER I2C Specification 5.7 stretching, and this should be taken into account by the master controller. The maximum speed at which the MTCH6301 can operate is 400 kbps. The MTCH6301 device supports the I2C serial protocol, with the addition of an interrupt pin for notifying the master that data is ready. The device operates in Slave mode, meaning that the device does not generate the serial clock. 5.7.1 5.7.
PAGE 15
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER I2C™ COMMAND READ AND WRITE FIGURE 5-7: Master Write INT SDA SCL DATA 4A 55 03 16 00 01 Master Read (Controller Response) Start Stop INT SDA SCL DATA 4B 05 55 03 00 16 0C Start 5.7.6 Stop TYPICAL I2C TOUCH PACKET READ Figure 5-8 depicts a single touch packet being streamed from the controller. In this case, touch ID 0 at location (1940,2592). FIGURE 5-8: I2C™ TOUCH PACKET READ INT SDA SCL DATA 4B 05 81 Start 5.7.
PAGE 16
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 6.
PAGE 17
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER TABLE 6-1: Index Byte Gestures Configure I/O Status Note 1: 0x50 MTCH6301 MEMORY MAP Offset Byte Register Name Size Bytes Data Range Default Value 0x00 RX Swipe Length 1 Minimum interpolated X-distance for ‘swipe’ gesture 10-255 160 0x01 TX Swipe Length 1 Minimum interpolated Y-distance for ‘swipe’ gesture 10-255 150 0x02 Swipe Boundary 1 Maximum interpolated distance in opposing direction to cancel ‘swipe’ gesture 0-255 150 0x03 S
PAGE 18
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 7.0 SPECIAL FEATURES 7.1 Gestures should serve most applications. These parameters and their descriptions are available in the “Gestures” section of the memory map (Section 6.0 “Memory Map”). Single finger gestures are a fast and intuitive way to navigate a feature rich human-machine interface. The MTCH6301 supports 11 single finger gestures natively, without requiring interaction from the master processor.
PAGE 19
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER FIGURE 7-2: SLEEP FUNCTIONALITY [Normal Full Decode of Sensor] Touch? Yes No Transmit Touch No touch for [SLP2] msec? No Yes Sleep for [SLP1] msec No Wake up; Touch exists? 7.3 Yes Non-Volatile RAM (NVRAM) Permanent storage of parameters that have been modified can be achieved using the internal NVRAM. This NVRAM is not meant for continuous writing, as it has a low write cycle limit of 20,000.
PAGE 20
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 7.4 Touch Performance Using default acquisition parameters, Figure 7-3 shows the relationship of single touch report rate with regard to sensor size. Larger sensors will have a reduced report rate, due to the additional time needed to scan the sensor. FIGURE 7-3: SINGLE-TOUCH REPORT RATE VS SENSOR SIZE Reports Per Second 400 300 200 100 0 2x 2 4x4 6x6 8x8 12x9 13x15 Sensor Channel Matrix DS41663A-page 20  2012 Microchip Technology Inc.
PAGE 21
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 8.0 ELECTRICAL CHARACTERISTICS 8.1 Absolute Maximum Ratings Absolute maximum ratings for the MTCH6301 device are listed below. Exposure to these maximum rating conditions for extended periods may affect device reliability. Functional operation of the device at these or any other conditions, above the parameters indicated in the operation listings of this specification, is not implied.
PAGE 22
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER TABLE 8-4: PIN INPUT AND OUTPUT SPECIFICATIONS Symbol Characteristic / Pins VIL Min. Max. Units RX, TX VSS 0.15 VDD V — SDA, SCL VSS 0.3 VDD V Note 1 0.65 VDD VDD V Note 1 0.65 VDD VDD V Note 1 INT, RX, TX VSS 0.4 V IOL < 10 mA, VDD = 3.3V SDA, SCL VSS 0.4 V IOL < 10 mA, VDD = 3.3V(1,2) 2.4 VDD V IOH < 10mA, VDD = 3.
PAGE 23
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER I2C™ BUS DATA TIMING CHARACTERISTICS FIGURE 8-2: TABLE 8-6: Parameter Number I2C™ BUS DATA TIMING REQUIREMENTS Symbol Characteristic IS1 TLO:SCL Clock Low Time IS2 THI:SCL Clock High Time 100 kHz Mode Min. Max. Units Conditions 4.7 — µs — 400 kHz Mode 1.3 — µs 100 kHz Mode 4.0 — µs 400 kHz Mode .6 — µs — 300 ns IS3 TF:SCL SDA and SCL Fall Time 100 kHz Mode 400 kHz Mode 20+0.
PAGE 24
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 9.0 ORDERING INFORMATION TABLE 9-1: ORDERING INFORMATION Part Number Pin Package Packing MTCH6301-I/PT 44 TQFP 10x10x1mm Tray MTCH6301-I/ML 44 QFN 8x8x0.9mm Tube MTCH6301T-I/PT 44 TQFP 10x10x1mm T/R MTCH6301T-I/ML 44 QFN 8x8x0.9mm T/R DS41663A-page 24  2012 Microchip Technology Inc.
PAGE 25
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER 10.0 PACKAGING INFORMATION 44-Lead QFN (8x8x0.9 mm) PIN 1 Example PIN 1 XXXXXXXXXXX XXXXXXXXXXX XXXXXXXXXXX YYWWNNN MTCH6301 -I/PT 1130235 44-Lead TQFP (10x10x1 mm) Example XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX YYWWNNN MTCH6301 e3 -I/PT 1130235 Legend: XX...
PAGE 26
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER DS41663A-page 26  2012 Microchip Technology Inc.
PAGE 27
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER  2012 Microchip Technology Inc.
PAGE 28
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER DS41663A-page 28  2012 Microchip Technology Inc.
PAGE 29
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER /HDG 3ODVWLF 7KLQ 4XDG )ODWSDFN 37 ± [ [ PP %RG\ PP >74)3@ 1RWH )RU WKH PRVW FXUUHQW SDFNDJH GUDZLQJV SOHDVH VHH WKH 0LFURFKLS 3DFNDJLQJ 6SHFLILFDWLRQ ORFDWHG DW KWWS ZZZ PLFURFKLS FRP SDFNDJLQJ D D1 E e E1 N b NOTE 1 1 2 3 NOTE 2 α A φ c β A2 A1 L L1 8QLWV 'LPHQVLRQ /LPLWV 1XPEHU RI /HDGV 0,//,0(7(56 0,1 1 120 0$; /HDG 3LWFK H 2YHUDOO +HLJKW $ ± %6& ± 0ROGHG 3DFNDJH 7KLFNQHVV $ 6WDQGRII
PAGE 30
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS41663A-page 30  2012 Microchip Technology Inc.
PAGE 31
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 32
Worldwide Sales and Service AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://www.microchip.com/ support Web Address: www.microchip.