Programmable Touch Screen Controller 64-Pin TQFP Tray

The TSC2300 is a highly integrated PDA analog interface circuit. It contains a complete 12-bit A/D resistivetouch screen converter including drivers, touch pressure measurement capability, keypad controller and 8-bitD/A converter output for LCD contrast control. The TSC2300 offers programmable resolution of 8, 10, and 12 bitsand sampling rates up to 125 kHz to accommodate different screen sizes. The TSC2300 interfaces to the hostcontroller through a standard SPI serial interface. The TSC2300 features a high-performance 20-bit, 48-ksps audio codec with highly integrated analog functionality. The audio portion of the TSC2300 containsmicrophone input with built-in pre-amp and microphone bias circuit, an auxiliary stereo analog input, a stereoline-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. The TSC2300 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 TSC2300 is available in a 64-lead TQFP.

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
• Integrated Touch Screen Processor Reduces Host CPU Interrupts and Overhead
• Internal Timing Control With Programmable Delays

Audio Codec

• 20-Bit Delta-Sigma ADC/DAC
• Dynamic Range: 98 dB
• Sampling Rate Up To 48 kHz
• I²S Serial Interface

Full Power Down Control

On-Chip Crystal Oscillator

6 GPIO Pins

Single 2.7-V to 3.6-V Supply

64-pin TQFP Package

APPLICATIONS

• Personal Digital Assistants
• Cellular Phones
• MP3 Players
• Internet Appliances
• Smartphones