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BU21025GUL データシート(PDF) 9 Page - Rohm |
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BU21025GUL データシート(HTML) 9 Page - Rohm |
9 / 19 page BU21025GUL TSZ02201-0Y2Y0F300050-1-2 © 2012 ROHM Co., Ltd. All rights reserved. 7.AUG.2012 Rev.002 www.rohm.com TSZ22111・15・001 9/15 Datasheet Datasheet ●Block Diagram ●Overview Power On Reset BU21025GUL requests that the Power On Reset Timing should be observed. If the Power On Reset Timing not be observed, BU21025GUL 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 BU21025GUL 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 Table 5. Table 5. 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 / 4096 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. |
同様の部品番号 - BU21025GUL |
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同様の説明 - BU21025GUL |
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