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.