TI TSC2008非常低功耗触摸屏控制方案

TI公司的TSC2008是非常低功耗触摸屏控制器,工作电压可低至1.2V,能用单节锂电池进行供电. TSC2008包括有完整的超低功耗12位A/D电阻型触摸屏转换器,有驱动器和控制逻辑,以便用来测量触摸压力,支持SPI串行总线和数据传输,SPI速率高达25MHz,12位分辨率时的有效吞吐量速率为10kHz,可用于手机,PDA,GPS和媒体播放器,手提仪表,POS终端以及多屏触摸系统.本文介绍了TSC2008的主要特性,方框图,典型应用电路以及TSC2008EVM评估板电路图和材料清单(BOM).

The TSC2008 is a very low-power touch screen controller designed to work with power-sensitive, handheld applications that are based on advanced low-voltage processors. It works with a supply voltage as low as 1.2V, which can be supplied by a single-cell battery. It contains a complete, ultra-low power, 12-bit, analog-to-digital (A/D) resistive touch screen converter, including drivers and the control logic to measure touch pressure.

In addition to these standard features, the TSC2008 offers preprocessing of the touch screen measurements to reduce bus loading, thus reducing the consumption of host processor resources that can then be redirected to more critical functions.
The TSC2008 supports an SPI serial bus and data transmission. It offers programmable resolution of 8 or 12 bits to accommodate different screen sizes and performance needs...

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