The TSC2300 is a highly integrated PDA analog interface circuit. It contains a complete 12-bit A/D resistive touch screen converter including drivers, touch pressure measurement capability, keypad controller and 8-bit D/A converter output for LCD contrast control. The TSC2300 offers programmable resolution of 8, 10, and 12 bits and sampling rates up to 125 kHz to accommodate different screen sizes. The TSC2300 interfaces to the host controller 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 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.

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

US Patent No. 6246394 SPI is a trademark of Motorola.