LIS3DETR datasheet(25/46 Pages) STMICROELECTRONICS

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LIS3DE

Digital interfaces

The SPI read command is performed with 16 clock pulses. Multiple byte read command is

performed adding blocks of 8 clock pulses at the previous one.

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).

bit 16-...: data DO(...-8). Further data in a multiple byte read.

Figure 8. Multiple byte SPI read protocol (2-byte example)

6.2.2

SPI write

Figure 9. SPI write protocol

The SPI write command is performed with 16 clock pulses. The multiple byte write

command is performed by adding blocks of 8 clock pulses to the previous one.

bit 0: WRITE bit. The value is 0.

bit 1: MS bit. When 0, does not increment the address; when 1, increments the address in

multiple writes.

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

bit 8-15: data DI(7:0) (Write mode). This is the data that is written inside the device (MSB

first).

bit 16-...: data DI(...-8). Further data in multiple byte writes.

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

DO15DO14DO13DO12DO11DO10DO9 DO8

SPC

SDI

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

AD5 AD4 AD3 AD2 AD1 AD0

LIS3DETR Datasheet(PDF) 25 Page - STMicroelectronics