LSM320HAY30 datasheet(25/42 Pages) STMICROELECTRONICS

部品番号	LSM320HAY30

部品情報	MEMS motion sensor module: 3D digital accelerometer and 2D pitch and yaw analog gyroscope

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25 / 42 page

LSM320HAY30

Digital interfaces

Doc ID 16917 Rev 1

25/42

Figure 9.

Multiple byte SPI write protocol (2 byte example)

6.2.3

SPI read in 3-wires mode

3-wires mode is entered by setting to ‘1’ bit SIM (SPI serial interface mode selection) in

LA_CTRL_REG4.

Figure 10.

SPI read protocol in 3-wires mode

The SPI Read command is performed with 16 clock pulses:

bit 0: READ bit. The value is 1.

bit 1: MS bit. When 0, do not increment the address. When 1, increment the address in

multiple reading.

bit 2-7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DO(7:0) (read mode). This is the data that is read from the device (MSb first).

Multiple read command is also available in 3-wires mode.

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

SPC

SDI/O

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

LSM320HAY30 データシート(PDF) 25 Page - STMicroelectronics