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AR1010-I/ML Datasheet(PDF) 23 Page - Microchip Technology |
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AR1010-I/ML Datasheet(HTML) 23 Page - Microchip Technology |
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23 / 70 page  2009-2012 Microchip Technology Inc. Preliminary DS41393B-page 23 AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER 5.5 Command Protocol The AR1021 controller receives commands from the host as follows: • The host clocks the bytes of a command to the AR1021 controller. • The AR1021 controller asserts the SIQ interrupt pin high when it is ready with a response to the command sent by the host. • The host clocks out the bytes of the command response from the AR1021 controller. • The AR1021 controller clears the SIQ interrupt pin low, after the first byte of the command response has been clocked out by the host. The communication protocol for the host sending the ENABLE_TOUCH command to the AR1021 controller is shown below in Figure 5-2. FIGURE 5-2: SPI TIMING DIAGRAM – COMMAND PROTOCOL (ENABLE_TOUCH) 5.6 SPI Bit Timing – General General timing waveforms are shown below in Figure 5-3. FIGURE 5-3: SPI GENERAL BIT TIMING WAVEFORM |
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