4-Wire Touch Screen Controller, St. CODEC with HP Amplifier (Keypad Int. + 6 GPIOs)


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TQFP (PAG) 64 144 mm² 12 x 12 open-in-new Find other Audio CODECs


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

US Patent No. 6246394
MicroStar Junior is a trademark of Texas Instruments.
SPI is a trademark of Motorola.

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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.

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Technical documentation

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Type Title Date
* Datasheet Programmable Touch Screen Controller w/Stereo Audio CODEC datasheet (Rev. D) Aug. 03, 2005
* Errata PDA Analog Interface Circuit Silicon Errata Feb. 12, 2003
Application notes Programming Sequences and Tips for TSC2000/2200/230x Applications Mar. 08, 2004
Application notes TCS2301 WinCE Generic Drivers Dec. 24, 2003
User guides Modular TSC2301 EVM Dec. 11, 2003
Application notes Applying the Current DAC on the TSC2000, TSC2200, TSC2300, and TSC2301 Touch Scr Jun. 13, 2003
Application notes Windows CE .NET Touch Screen, Keypad and Audio Device Drivers for the TSC2301 Feb. 27, 2003

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SLAC042.ZIP (152 KB)

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PSpice® for TI design and simulation tool
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  • Leverages Cadence PSpice Technology
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Coefficient Calculator For Digital Biquad Filters
COEFFICIENT-CALC COEFFICIENT-CALC (TIBQ) calculates the coefficients for the digital filter biquad transfer function implemented in TI audio codecs. The characteristics of the digital filter are adjusted by selecting a filter type and moving a control point within a window that shows the transfer function gain and (...)

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