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BU21026MUV-E2 Fiches technique(PDF) 4 Page - Rohm |
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BU21026MUV-E2 Fiches technique(HTML) 4 Page - Rohm |
4 / 23 page 4/19 TSZ02201-0L5L0FF00890-1-2 © 2016 ROHM Co., Ltd. All rights reserved. 4.Aug.2016 Rev.001 www.rohm.com TSZ22111 • 15 • 001 BU21026MUV Block Diagram(s) Touch Screen Interface Clock Oscillator A/D Converter Control Logic & 2-wire Serial Interface INT Digital Filter Touch Detection SDA SCL AD1 AD0 Power On Reset XP YP XN YN AUX VDD GND Description of Block(s) Power on Reset BU21026MUV requests that the Power on Reset Timing should be observed. If the Power on Reset Timing not be observed, BU21026MUV may wakeup with a random state. The touch detection and 2-wire serial interface is enabled after taking the device ready time. A/D Converter BU21026MUV has a 12-bit Successive Approximation Resistor (SAR) Analog to Digital (A/D) converter. This A/D converter is used for measuring X and Y position and Auxiliary input voltage. Output format is in straight binary as shown in below table. A/D Convertor Output Format INPUT VOLTAGE OUTPUT (VREF - 1.5LSB) ~ VREF FFFh (VREF - 2.5LSB) ~ (VREF - 1.5LSB) FFEh (VREF - 3.5LSB) ~ (VREF - 2.5LSB) FFDh : : 1.5LSB ~ 2.5LSB 002h 0.5LSB ~ 1.5LSB 001h 0 ~ 0.5LSB 000h Note: VREF = VREFP – VREFN, LSB = VREF / 4095 Touch Screen I/F A touch screen interface is consisted many switches. These switches are used for the driving screen voltage and selection an input of the A/D converter. State of these switches is selected by a command that sent from the master. |
Numéro de pièce similaire - BU21026MUV-E2 |
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Description similaire - BU21026MUV-E2 |
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