LPS25HB datasheet(22/40 Pages) STMICROELECTRONICS

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Digital interfaces

LPS25HB

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DocID027112 Rev 2

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)

6.3.2

SPI write

Figure 9. SPI write protocol

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

is performed by adding blocks of 8 clock pulses to the previous one.

bit 0: WRITE bit. The value is 0.

bit 1: MS bit. When 0, does not increment the address; when 1, increments the address in

multiple writes.

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 writes.

SPC

SDI

SDO

SPC

SDI

DI7

DI6

DI5DI4

DI3DI2

DI1

DI0

AD5 AD4 AD3 AD2 AD1 AD0

AD6

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