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SLAS379A− APRIL 2003 − REVISED JUNE 2004
FEATURES
D 4-Wire Touch Screen Interface
D Integrated Touch Screen Processor With
Fully Automated Modes of Operation
D Programmable Converter Resolution, Speed,
and Averaging
D Programmable Autonomous Timing Control
D Direct Battery Measurement
D On-Chip Temperature Measurement
D Stereo Audio Playback Up to 48 ksps
D 97-dB Stereo Audio Playback
D Integrated PLL for Audio Clock Generation
D Programmable Digital Audio Effects
Processing
D Stereo Headphone Amplifier
D SPI Serial Interface
D Glueless Interface With OMAP and Xscale
Processors
D Full Power-Down Control
D Low Power: 11-mW Stereo Audio Playback
D 32-Pin TSSOP Package
APPLICATIONS
D Personal Digital Assistants
D Smart Cellular Phones
D 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.
US Patent No. 624639
SPI is a trademark of Motorola.
OMAP is a trademark of Texas Instruments.
Xscale is a trademark of Intel.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Copyright 2003−2004, Texas Instruments Incorporated
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