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TSC2200 Datasheet(PDF) 8 Page - Burr-Brown (TI) |
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TSC2200 Datasheet(HTML) 8 Page - Burr-Brown (TI) |
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8 / 40 page  8 www.ti.com TSC2200 SBAS191F FIGURE 1. Typical Circuit Configuration. OVERVIEW The TSC2200 is an analog interface circuit for human inter- face devices. A register-based architecture eases integration with microprocessor-based systems through a standard SPI bus. All peripheral functions are controlled through the reg- isters and onboard state machines. The TSC2200 consists of the following blocks (refer to the block diagram on the front page): • Touch Screen Interface • Keypad Interface • Battery Monitors • Auxiliary Inputs • Temperature Monitor • Current Output D/A Converter Communication to the TSC2200 is via a standard SPI serial interface. This interface requires that the Slave Select signal be driven LOW to communicate with the TSC2200. Data is then shifted into or out of the TSC2200 under control of the host microprocessor, which also provides the serial data clock. Control of the TSC2200 and its functions is accomplished by writing to different registers in the TSC2200. A simple com- mand protocol is used to address the 16-bit registers. Reg- isters control the operation of the A/D converter, D/A con- verter, and keypad scanner. The result of measurements made will be placed in the TSC2200’s memory map and may be read by the host at any time. Three signals are available from the TSC2200 to indicate that data is available for the host to read. The DAV output indicates that an A/D conversion has completed and that data is available. The KBIRQ output indicates that a key on the keypad has been pressed. The PENIRQ output indicates that a touch has been detected on the touch screen. A typical application of the TSC2200 is shown in Figure 1. + Auxiliary Input Auxiliary Input Pen Interrupt Request Serial Data Out Data Available Serial Data In Slave Select Serial Clock 1 µF to 10 µF (Optional) +2.7V to +3.3V Touch Screen 0.1 µF +V DD X+ Y+ X– Y– GND V BAT1 V BAT2 V REF KBIRQ R1 R2 R3 R4 AUX1 AUX2 ARNG A OUT PENIRQ MISO DAV MOSI SS SCLK C4 C3 C2 C1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 TSC2200IPW + 1 µF to 10 µF (Optional) 0.1 µF Main Battery Secondary Battery Keypad Keyboard Interrupt Request LCD Contrast Voltage Regulator RRNG |
Similar Part No. - TSC2200 |
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Similar Description - TSC2200 |
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