FEATURES

4-Wire Touch Screen Interface

Integrated Touch Screen Processor With

Fully Automated Modes of Operation

Programmable Converter Resolution, Speed,

and Averaging

Programmable Autonomous Timing Control

Direct Battery Measurement

On-Chip Temperature Measurement

Stereo Audio Playback Up to 48 ksps

97-dB Stereo Audio Playback

Integrated PLL for Audio Clock Generation

Programmable Digital Audio Effects

Processing

Stereo Headphone Amplifier

SPI Serial Interface

Glueless Interface With OMAP and Xscale

Processors

Full Power-Down Control

Low Power: 11-mW Stereo Audio Playback

32-Pin TSSOP Package

APPLICATIONS

Personal Digital Assistants

Smart Cellular Phones

MP3 Players

DESCRIPTION

The TSC2102 is a highly integrated combination resistive

touch screen controller with on-chip processor and audio

DAC. The touch screen portion of the TSC2102 contains

a 12-bit 4-wire resistive touch screen converter complete

with drivers, and interfaces to the host controller through

a standard SPI serial interface. The on-chip processor

provides extensive features specifically designed to

reduce host processor and bus overhead, with capabilities

that include fully automated operating modes,

programmable conversion resolution up to 12 bits,

programmable sampling rates up to 125 kHz,

programmable conversion averaging, and programmable

on-chip timing generation.

The TSC2102 also features a high-performance audio

DAC with 16, 20, 24, or 32-bit stereo playback functionality

at up to 48 ksps. The stereo output drivers on the TSC2102

can be programmed for headphone drive or line-level

drive, and support capless as well as ac-coupled output

configurations. The digital audio data format is

programmable to work with popular audio standard

protocols (I2S, DSP, left/right justified) in master or slave

mode, and also includes an on-chip PLL for flexible clock

generation capability.

The TSC2102 offers two battery measurement inputs

capable of reading battery voltages up to 6 V, while

operating at only 2.7 V. It also has an on-chip temperature

sensor capable of reading 0.3°C resolution. The TSC2102

is available in a 32-lead TSSOP.