LSM303D datasheet(25/52 Pages) STMICROELECTRONICS

Teilenummer	LSM303D

Bauteilbeschribung	Embedded temperature sensor

PDF	52 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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DocID023312 Rev 2

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LSM303D

Digital interfaces

6.2.1

SPI read

Figure 7. SPI read protocol

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

is performed by adding blocks of 8 clock pulses to 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 multiple byte reads.

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

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

AM10130V1

SPC

SDI

SD O

DO 7 DO6 DO 5 DO4 DO 3 DO2 DO 1 DO0

A D5 A D4 AD 3 A D2 A D1 A D0

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

AM10131V1

LSM303D Datenblatt(PDF) 25 Page - STMicroelectronics