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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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BMA150 датащи(PDF) 29 Page - Bosch Sensortec GmbH |
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BMA150 датащи(HTML) 29 Page - Bosch Sensortec GmbH |
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29 / 56 page  Data sheet BMA150 Triaxial, digital acceleration sensor Bosch Sensortec Rev. 1.6 Page 29 30 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Note: Specifications within this document are subject to change without notice. 4.1.2 Three-wire SPI interface 3-wire SPI is not the default serial interface. The customer can easily activate the 3-wire SPI by setting a control bit (SPI4=0). The 3-wire SPI interface uses SCK (serial clock), CSB (chip select, active low) and SDA (serial data in/out). A maximum clock frequency up to 70MHz can be handled. The protocol data acquisition by the sensor IC occurs at the rising edge of SCK. The output data provided by the sensor IC is synchronized also on the rising edges of SCK. The 3-wire read protocol needs one extra clock cycle between address byte and data output byte. Figure 8: Timing diagram for three-wire SPI interface (SDI = SDA) CSB SCK T_setup_csb_3 T_hold_csb_3 SDI 7 6 5 4 3 2 1 0 Xtra 7 6 5 4 3 2 1 0 r A6 A5 A4 A3 A2 A1 A0 T_delay_sdi_3 T_setup_sdi_3 T_hold_sdi_3 D6 D5 D4 D3 D2 D1 D0 D7 T_low_sck_3 T_high_sck_3 T_delay_sdi_3 |
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