LIS2DH datasheet(27/50 Pages) STMICROELECTRONICS

Part #	LIS2DH

Description	ultra low-power high performance 3-axis ?쐄emto??accelerometer

PDF	50 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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27 / 50 page

LIS2DH

Digital interfaces

Doc ID 022516 Rev 1

27/49

5.2.1

SPI read

Figure 7.

SPI read protocol

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 do not increment address, when 1 increment 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 will be read from the device (MSb

first).

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

Figure 8.

Multiple bytes SPI read protocol (2 bytes example)

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

AM10130V1

C S

SPC

SDI

SDO

DO 7 DO 6 DO 5 DO 4 DO 3 DO 2 DO 1 DO 0

AD5 A D4 AD 3 AD2 A D1 AD0

DO 15 DO 14 DO 13 DO 12 DO 11 DO 10 D O9 D O8

M S

AM10131V1

LIS2DH Datasheet(PDF) 27 Page - STMicroelectronics