LSM303D Datasheet, PDF (25/52 Pages) STMicroelectronics – Embedded temperature sensor

LSM303D
Digital interfaces
6.2.1
SPI read
Figure 7. SPI read protocol
CS
SPC
SDI
RW
MS AD5 AD4 AD3 AD2 AD1 AD0
SDO
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
AM10130V1
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)
CS
SP C
SDI
SD O
RW
M S A D5 A D4 AD 3 A D2 A D1 A D0
DO 7 DO 6 DO 5 DO 4 DO 3 DO 2 DO 1 DO 0 DO 15 DO 14 DO 13 DO 12 DO 11 DO 10 D O9 D O8
AM10131V1
DocID023312 Rev 2
25/52
52