FEATURES

· SPI™ Serial Interface

· Touch Screen Controller

– 4-Wire Touch Screen Interface

– Internal Detection of Screen Touch and

Keypad Press

– Touch Pressure Measurement

– Ratiometric Conversion

– Programmable 8-, 10- or 12-Bit Resolution

– Programmable Sampling Rates Up to 125

kHz

– Direct Battery Measurement (0 to 6 V)

– On-Chip Temperature Measurement

– 4-by-4 Keypad Interface With

Programmable De-Bounce and Key

Masking

– Integrated Touch Screen Processor

Reduces Host CPU Interrupts and Overhead

– Internal Timing Control With Programmable Delays and Averaging

· Stereo Audio Codec

– 20-Bit Delta-Sigma ADC/DAC

– Dynamic Range: 98 dB

– Sampling Rate Up to 48 kHz

– I2S Serial Interface

– Stereo 16-W Headphone Driver

· Full Power-Down Control

· 8-Bit Current Output DAC

· On-Chip Crystal Oscillator

· Programmable Bass/ Midrange/ Treble EQ

Effects Processing

· 6 GPIO Pins

· Single 2.7-V to 3.6-V Supply

· 64-Pin TQFP Package

· 120-Ball MicroStar Junior™ BGA Package

APPLICATIONS

· Personal Digital Assistants

· Cellular Phones

· MP3 Players

· Internet Appliances

· Smartphones

DESCRIPTION

The TSC2301 is a highly integrated PDA analog

interface circuit. It contains a complete 12-bit A/D

resistive touch screen converter (ADC) including

drivers, touch pressure measurement capability,

keypad controller, and 8-bit D/A converter (DAC)

output for LCD contrast control. The TSC2301 offers

programmable resolution of 8, 10, and 12 bits and

sampling rates up to 125 kHz to accommodate

different screen sizes. The TSC2301 interfaces to the

host controller through a standard SPI serial

interface.

The TSC2301 features a high-performance 20-bit, 48-ksps stereo audio codec with highly integrated

analog functionality. The audio portion of the

TSC2301 contains microphone input with built-in

pre-amp and microphone bias circuit, an auxiliary

stereo analog input, a stereo line-level output, a

differential mono line-level output, and a stereo

headphone amplifier output. The digital audio data is

transferred through a standard I2S interface. A fully

programmable PLL for generating audio clocks from a

wide variety of system clocks is also included.

The TSC2301 also offers two battery measurement

inputs capable of battery voltages up to 6 V, while

operating at a supply voltage of only 2.7 V. It also has

an on-chip temperature sensor capable of reading

0.3°C resolution. The TSC2301 is available in 64-lead

TQFP, and 120-ball VFBGA packages.

US Patent No. 6246394