Digital interfaces

L2G3IS

16/26

DocID024950 Rev 3

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

(MSb first).

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

Figure 7. Multiple byte SPI write protocol (2-byte example)

5.1.2

SPI read

Figure 8. SPI read protocol

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 will be read from the device (MSb

first).

A multiple read command is also available.

CS

SCL

RW

AD5 AD4 AD3 AD2 AD1 AD0

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

MS

SDI/SDO

CS

RW

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

MS

SCL

SDI/SDO