Aceinna IMU381 SERIES User Manual
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IMU381ZA Series User’s Manual________________________________________________________________________Doc# 7430-3881-02 Page 11BITstatus Field Bits Meaning CategoryReserved 13:15 N/A N/AThe unit also allows a user to configure the Status byte within the BIT message. To configure theword, select the BIT Configuration tab from the Unit Configuration menu. The dialog box allowsselection of which status types to enable (hardware, software, sensor, and comm). In the case ofthe unit, which has fewer features and options than other Acienna measurement products, the onlymeaningful parameter is sensor over-range. It is recommended that users leave the defaultconfiguration, which is sensorStatus enabled and flag on sensor over-range. The over-range onlyapplies to the rotational rate sensors. Because instantaneous acceleration levels due to vibrationcan exceed the accelerometer sensor range in many applications, none of the IMU381 Seriesproducts trigger over-range on accelerometer readings.4 IMU381 SPI Port Interface DefinitionThe IMU381 provides a SPI interface for data communications. This section of the user’s manualdefines the unit register map, register control capabilities, and the data register reading andwriting methodologies.The unit operates as a slave device. The master device must be configured to communicate withthe unit using the following settings:• Data transferred in 16-bit word-length and MSB-first• f CLK ≤ 2.0 MHz• CPOL = 1 (clock polarity) and CPHA = 1 (clock phase)Additional operational requirements are described in Section 4.8.IMU381 Register MapTable 3 describes the IMU381 register map. In the following tables the phrasing “ |
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