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TSC2006 Datasheet(PDF) 11 Page - Texas Instruments |
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TSC2006 Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 46 page  www.ti.com OVERVIEW X+ Y+ X- Y- AuxilaryInput AGND AGND TSC2006 SNSGND DGND 1 F m 1.6VDC 0.1 F m Touch Screen GPIO GPIO SDI SCLK SDO CS Host Processor PINTDAV RESET SDO SCLK 1 F m 0.1 F m 1 F m 0.1 F m ( isoptional; softwareimplementation pollingoftheStatus registerispossible) PINTDAV TSC2006 SBAS415A – JUNE 2007 – REVISED NOVEMBER 2007 The TSC2006 is an analog interface circuit for a human interface touch screen device. A register-based architecture eases integration with microprocessor-based systems through a standard SPI bus. All peripheral functions are controlled through the registers and onboard state machines. The TSC2006 features include: • Very low-power touch screen controller • Very small onboard footprint • Relieves host from tedious routine tasks by flexible preprocessing, saving resources for more critical tasks • Ability to work on very low supply voltage • Minimal connection interface allows easiest isolation and reduces the number of dedicated I/O pins required • Miniature, yet complete; requires no external supporting component. (NOTE: Although the TSC2006 can use an external reference, it is also possible to use SNSVDD as the reference.) • Enhanced ESD protection up to 8kV The TSC2006 consists of the following blocks (refer to the block diagram on the front page): • Touch Screen Interface • Auxiliary Input (AUX) • Temperature Sensor • Acquisition Activity Preprocessing • Internal Conversion Clock • SPI Interface Communication with the TSC2006 is done via an SPI serial interface. The TSC2006 is an SPI slave device; therefore, data are shifted into or out of the TSC2006 under the control of the host microprocessor, which also provides the serial data clock. Control of the TSC2006 and its functions is accomplished by writing to different registers in the TSC2006. A simple serial command protocol (compatible with SPI), is used to address these registers. The measurement result is placed in the TSC2006 registers and may be read by the host at any time. This preprocessing frees up the host so that resources can be redirected for more critical tasks. Two optional signals are also available from the TSC2006 to indicate that data are available for the host to read. PINTDAV is a programmable interrupt/status output pin that can be programmed to indicate a pen-touch, data available, or the combination of both. Figure 23 shows a typical application of the TSC2006. Figure 23. Typical Circuit Configuration Copyright © 2007, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): TSC2006 |
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