ATMXT1664S1-CU049 datasheet, PDF

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ATMXT1664S1-CU049: DescriptionAnalog Circuit, 1 Func, PBGA128; CategoryAnalog mixed-signal IC The signal circuit; File Size2MB，92 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com

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ATMXT1664S1-CU049 Overview

Analog Circuit, 1 Func, PBGA128

ATMXT1664S1-CU049 Parametric

Parameter Name	Attribute value
Maker	Microchip
package instruction	VFBGA-128
Reach Compliance Code	compli
Analog Integrated Circuits - Other Types	ANALOG CIRCUIT
JESD-30 code	S-PBGA-B128
length	7 mm
Number of functions	1
Number of terminals	128
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	VFBGA
Package shape	SQUARE
Package form	GRID ARRAY, VERY THIN PROFILE, FINE PITCH
Maximum seat height	1 mm
Maximum supply voltage (Vsup)	3.3 V
Minimum supply voltage (Vsup)	2.7 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal form	BALL
Terminal pitch	0.5 mm
Terminal location	BOTTOM
width	7 mm

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Features

•

maXTouch

Touchscreen

– Two touchscreens with true 12-bit multiple touch reporting and real-time XY

tracking for up to 16 concurrent touches per touchscreen

– Screen sizes 8 – 12.1 inches diagonal supported at 5 mm electrode pitch.

Number of Channels

– Electrode grid configurations of up to 32 X and 52 Y lines supported

– Touchscreens up to 1664 channels (subject to other configurations)

– Up to 32 channels can be allocated as fixed keys (subject to other configurations)

Signal Processing

– Advanced digital filtering using both hardware engine and firmware

– Self-calibration

– Auto drift compensation

– Adjacent Key Suppression

(AKS

) technology

– Noise cancellation algorithms for display noise suppression

– Grip suppression and suppression of unintentional touches

– Down-scaling and clipping support to match LCD resolution

– Ultra-fast start-up and calibration for best user experience

– Supports axis flipping and axis switch-over for portrait and landscape modes

– Fast and powerful 32-bit processor core

– Supports baseline reference data for better calibration

– Supports lens bending algorithms to restore signal distortions

Scan Speed

– Maximum single touch >250Hz, subject to configuration

– Maximum 16 touches >100Hz, subject to configuration

– Configurable to allow power/speed optimization

– Programmable timeout for automatic transition from active to idle states

Response Times

– Initial latency <15 ms for first touch from idle, subject to configuration

Sensors

– Works with PET or glass sensors, including curved profiles

– Works with all proprietary sensor patterns recommended by Atmel

Stylus Support

– Supports passive stylus with 2 mm contact diameter, subject to configuration

– Supports Atmel maXStylus

™

, subject to configuration

Environmental Conditions

– Operating temperature –40°C to +85°C

– Moisture tolerance good

Panel Thickness

– Glass up to 2.5 mm, screen size dependent

– Plastic up to 1.2 mm, screen size dependent

Interfaces

– I

C-compatible slave mode; Standard/Fast Mode: up to 400 kHz, High speed mode:

up to 1.7 MHz

– USB 2.0-compliant composite device, full speed (12 Mbps)

– HID-I

C interface for Microsoft

Windows

•

maXTouch

1664-channel

Touchscreen

Controller

mXT1664S1

Revision 2.0

•

9871EX–AT42–12/13

mXT1664S1

1. Overview of the mXT1664S1

1.1

Introduction

The Atmel maXTouch family of touch controllers has set a new industry benchmark for

capacitive touchscreens with their low current consumption, fast response time and high levels

of accuracy. The mXT1664S1 single-chip solution offers the benefits of the maXTouch

enhanced architecture on devices with touchscreens up to 14 in. diagonal:

•

Patented capacitive sensing method

– The mXT1664S1 uses a unique charge-transfer

acquisition engine to implement the Atmel

patented QMatrix

capacitive sensing method.

This allows the measurement of up to 1664 mutual capacitance nodes. Coupled with a

state-of-the-art CPU, the entire touchscreen sensing solution can measure, classify and

track individual finger touches with a high degree of accuracy.

•

Capacitive Touch Engine (CTE)

– The mXT1664S1 features an acquisition engine, which

uses an optimal measurement approach to ensure almost complete immunity from

parasitic capacitance on the receiver inputs (Y lines). The engine includes sufficient

dynamic range to cope with anticipated touchscreen mutual capacitances, which allows

great flexibility for use with the Atmel proprietary ITO pattern designs. One and two layer

ITO sensors are possible using glass or PET substrates.

•

Noise filtering

– Hardware noise processing in the capacitive touch engine provides

enhanced autonomous filtering and allows a broad range of noise profiles to be handled.

The result is good performance in the presence of charger and LCD noise.

•

Processing power

– The main CPU has two powerful, yet low power, microsequencer

coprocessors under its control. These combine to allow the signal acquisition,

preprocessing, postprocessing and housekeeping to be partitioned in an efficient and

flexible way. This gives ample scope for sensing algorithms, touch tracking or advanced

shape-based filtering. An in-circuit reflash can be performed over the chip’s hardware-

driven interface.

•

Interpreting user intention

– The Atmel mutual capacitance method provides

unambiguous multitouch performance. Algorithms in the mXT1664S1 provide optimized

touchscreen position filtering for the smooth tracking of touches. Stylus support allows

stylus touches to be detected and distinguished from other touches, such as finger

touches. The suppression of unintentional touches from the user’s gripping fingers, resting

palm or touching cheek or ear also help ensure that the user’s intentions are correctly

interpreted.

1.2

Understanding Unfamiliar Concepts

If some of the concepts mentioned in this datasheet are unfamiliar, see the following sections

for more information:

•

Appendix C on page 81

for a glossary of terms

•

Appendix D on page 82

for QMatrix technology

9871EX–AT42–12/13

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