High Performance Inertial Measurement Unit MAITE-900

The coordinate system definitions of three gyros (gx, gy, gz) and three accelerometers (ax, , ) are shown in the figure below, and the arrow direction is positive.

LINS16488 is an autonomous sensor system. When there is an effective power supply, it will start automatically. After completing the initialization process, it starts sampling, processing and loading the calibrated sensor data into the output register, which can be accessed through the SPI port. SPI port is usually connected to compatible port of embedded processor. See figure for connection diagram. Four SPI signals support synchronous serial data transmission. In the factory default configuration, DIO2 provides data ready signal; When new data is available in the output data register, the pin goes high.

If the previous command is a read request, the SPI port supports full duplex communication. The external processing device can read DOUT while simultaneously writing to DIN, as shown in the diagram below.

LINS16488 automatically starts and activates page 0 for data register access. After accessing any other page, 0x00 should be written to page_ ID register (DIN = 0x8000) to activate page 0 in preparation for subsequent data access. A single register read operation requires two 16 bit SPI cycles. In the first cycle, the bit allocation function in Fig. 1 is used to request to read the contents of a register; In the second cycle, the contents of the register are output through dout. The first bit of the din command is 0, followed by the high or low address of the register. The last 8 bits are irrelevant bits, but the SPI needs a complete 16 sclks to receive the request. The following figure shows two consecutive register read operations. First, DIN = 0x1a00, request Z_ GYRO_ Contents of out register, then DIN = 0x1800, request Z_ GYRO_ The contents of the low register.