LPS25H datasheet(19/45 Pages) STMICROELECTRONICS

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LPS25H

Digital interfaces

bit 1: MS bit. When 0 do not increment the address, when 1 increment the address in

multiple writings.

bit 2 -7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DI(7:0) (write mode). This is the data that is written in the device (MSb first).

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

Figure 10. Multiple bytes SPI write protocol (2 bytes example)

5.3.3

SPI read in 3-wires mode

A 3-wires mode is entered by setting to ‘1’ bit SIM (SPI serial interface mode selection) in

CTRL_REG1.

Figure 11. SPI read protocol in 3-wires 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, do not increment the address, when 1, increment the address in

multiple readings.

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).

Multiple read command is also available in 3-wires mode.

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

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

SPC

SDI/O

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

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