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LSM330 数据表(PDF) 32 Page - STMicroelectronics |
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LSM330 数据表(HTML) 32 Page - STMicroelectronics |
32 / 75 page Digital interfaces LSM330 32/75 DocID023426 Rev 3 6 Digital interfaces The registers embedded in the LSM330 may be accessed through both the I2C and SPI serial interfaces. The latter may be SW configured to operate either in 3-wire or 4-wire interface mode. To select/exploit the I2C interface, the CS line must be tied high (i.e. connected to Vdd_IO). 6.1 I2C serial interface The LSM330 I2C is a bus slave. The I2C is employed to write the data to the registers, whose content can also be read back. The relevant I2C terminology is provided in the table below. There are two signals associated with the I2C bus: the Serial Clock Line (SCL) and the Serial Data line (SDA). The latter is a bidirectional line used for sending and receiving the data to/from the interface. Table 9. Serial interface pin description Pin name Pin description CS_A Linear acceleration SPI enable Linear acceleration I2C/SPI mode selection (1: I2C mode; 0: SPI enabled) CS_G Angular rate SPI enable Angular rate I2C/SPI mode selection (1: I2C mode; 0: SPI enabled) SCL_A/G I2C serial clock (SCL) SPI serial port clock (SPC) SDA_A/G I2C serial data (SDA) SPI serial data input (SDI) 3-wire interface serial data output (SDO) SDO_A SDO_G I2C least significant bit of the device address (SA0) SPI serial data output (SDO) Table 10. Serial interface pin description Term Description Transmitter The device which sends data to the bus Receiver The device which receives data from the bus Master The device which initiates a transfer, generates clock signals and terminates a transfer Slave The device addressed by the master |
类似零件编号 - LSM330 |
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类似说明 - LSM330 |
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