H3LIS331DL datasheet(22/38 Pages) STMICROELECTRONICS

Part #	H3LIS331DL

Description	MEMS motion sensor: low-power high-g 3-axis digital accelerometer

PDF	38 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Digital interfaces

H3LIS331DL

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DocID023111 Rev 2

Figure 10. Multiple byte SPI write protocol (2-byte example)

5.2.3

SPI read in 3-wire mode

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

CTRL_REG4.

Figure 11. SPI read protocol in 3-wire 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, does not increment the address. When 1, increments the address in

multiple reads.

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).

The multiple read command is also available in 3-wire 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

H3LIS331DL Datasheet(PDF) 22 Page - STMicroelectronics