Diodes AUR3852 Manuel d'utilisateur télécharger pdf

Data Sheet

Enhanced Multi-touch Capacitive Touch Screen Controller AUR3852

Feb. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

General Description

The AUR3852 is a low-cost high-resolution single

chip solution for APA capacitive touch screen. It is

an 8-bit single cycle 8051 microcontroller with ICP

Interface. The chip includes a 12-bit successive

approximation analog-to-digital converter with an I

interface and multiplexer-switcher circuits for

flexible measurement of analog signal from APA

panel. An accurate switched-capacitor integrator is

built-in and it can auto calibrate the pixel parameters

for a wide range of capacitance on the touch screen

(0.1pF to 4pF). On-chip capacitor can replace

external component. This touch screen controller

(TSC) with CMOS integration circuit provides an

ideal choice for APA touch panel. The AUR3852 is

specified over the temperature range of -40°C to

85°C.

The AUR3852 is available in QFN-6×6-48 and

QFN-7×7-56 packages.

Features

•

1Mutual Capacitive Touch Sensing

• Single Power Supply: 2.8V to 3.6V Operation

Voltage

•

1Supports Low Voltage to 1.8V by Built-in 1.8V

to 3.3V Boost Converter

• QFN-6×6-48 Package: Up to 20 Drive Lines and

14 Sense Lines

•

1QFN-7×7-56 Package: Up to 27 Drive Lines and

15 Sense Lines

•

1Dedicated Internal Two-wire Serial Control Bus

C and UART between AUR3852 and Host

•

1Single-end Integrator with Programmable Gain

Control and Offset Control

•

1Multiplexed Analog Digitization with 12-bit

Resolution SAR ADC

Features (Continued)

• Single Cycle 8051 CPU Core, Maximum Opera-

ting Clock up to 24MHz from IOSC

2MHz to 24MHz Internal Oscillator (IOSC)

32K-byte Flash ROM

256-byte Internal SRAM and 5888-byte

XSRAM

Two 16-bit Timers T0/T1 and One 16-bit ECT

Timer T2

One I

C Slave Controller and One I

C Master

Controller Shared with the Same Port

 With Asynchronous I

C Slave Address

Detection Logic Design

Up to 30 General Purpose GPIO Pins (QFN-56);

25 General Purpose GPIO Pins (QFN-48)

Up to 8 External Interrupt Pins

Up to 2 UART Ports (QFN-56); 1 UART Port

(QFN-48)

• ISP/IAP via I²C/UART Port

(With External Clock I/O Pin Definition for

UART IAP. Pin Shared with P1.7)

• Operation Temperature Range: -40°C to 85°C

• Package Type: QFN-6×6-48 and QFN-7×7-56

• RoHS Compliance

• Operating Mode:

Mode Description

Power-down No scan with power-down mode

Low speed Lower scan rate when finger is not

on panel, IOSC=32kHz

Standard Higher scan rate when fingers are

on panel, IOSC can up to 2MHz

to 24MHz

Applications

• Mobile Phones

• Personal Digital Assistants

• Smart Hand-held or Gaming Devices

Figure 1. Package Types of AUR3852

QFN-6×6-48

QFN-7×7-56

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