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XPT7603 Scheda tecnica(PDF) 17 Page - List of Unclassifed Manufacturers |
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XPT7603 Scheda tecnica(HTML) 17 Page - List of Unclassifed Manufacturers |
17 / 25 page X XP PT T7 76 60 03 3 D Da atta aS Sh he ee ett C Co op py yrriig gh htt© ©2 20 00 09 9,, S SH HE EN NZ ZH HE EN N X XP PT TE EK K T TE EC CH HN NO OL LO OG GY Y C CO O..,,L LT TD D http://www.xptek.com.cn P Pa ag ge e 17/25 Figure 1 the battery voltage measurement function module map 8.9 Pressure Measurement XPT7603 can also measure the pressure of touch, that is written in Table 3 Measurement of Z direction. In general, the performance of such measurements do not ask for much, so the use of 8-bit resolution mode (however, the calculation is the following 12-bit resolution mode) can be. There are several different ways to achieve the pressure measurements. The first method needs to know X panel of the resistance, X the location of the measurement, touch screen panel attached between the two measured values (Z1 and Z2), as shown in Figure 11. Formula can be used (3) calculate the touch resistance: R touch = RX panel • ... ... ... ... ... ... (3) The second approach requires the detection of X and Y panels panel resistance, X and Y position, and the Z1 position. Formula can be (4) Calculation of touch resistance: ... ... ... ... ... ... (4) Figure 1 Pressure Measurement Block Diagram 9 Digital Interface XPT7603 data interface is I2C serial interface, I2C interface to meet the agreement, can realize the standard model (100K), fast mode (400K) or high-speed mode (3.4M), divided into the control of XPT7603 writing, reading two command format, write command is used to enter an address and command bytes, so that work in the designated XPT7603 configuration and mode, XPT7603 read command is used to output data of ADC conversion in order to obtain information related to measurement. |
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