Data Sheet

Digital interfaces LPS25HB
30/50 DocID027112 Rev 4
6.3.3 SPI read in 3-wire mode
A 3-wire mode is entered by setting to ‘1’ bit SIM (SPI serial interface mode selection) in
CTRL_REG1.
Figure 18.
SPI read protocol in 3-wire mode
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 is read from the device (MSb first).
A multiple read command is also available in 3-wire mode.
CS
SPC
SDI/O
RW
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
AD5 AD4 AD3 AD2 AD1 AD0
MS