Digital interfaces

LPS001WP

18/30

Doc ID 18171 Rev 1

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

command is performed adding blocks of 8 clock pulses at the previous one.

bit 0: WRITE bit. The value is 0.

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 inside the device (MSb

first).

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

Figure 8.

Multiple bytes SPI write protocol (2 bytes example)

6.2.3

SPI read in 3-wires mode

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

internal control register.

Figure 9.

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.

CS

SPC

SDI

RW

AD5 AD4 AD3 AD 2 AD 1AD0

DI7DI 6 DI5D I4 DI3 DI2 DI1 DI0 D I15DI 14 DI13D I1 2DI11 DI10DI9 DI8

MS

CS

SPC

SDI

RW

AD5 AD4 AD3 AD 2 AD 1AD0

DI7DI 6 DI5D I4 DI3 DI2 DI1 DI0 D I15DI 14 DI13D I1 2DI11 DI10DI9 DI8

MS

CS

SPC

SDI/O

RW

DO7DO6 D O5 DO4 DO3DO2 DO1 DO0

AD5 AD 4 AD 3 AD2 AD1

AD 0

MS

CS

SPC

SDI/O

RW

DO7DO6 D O5 DO4 DO3DO2 DO1 DO0

AD5 AD 4 AD 3 AD2 AD1

AD 0

MS

Obsolete

Product(s)

- Obsolete

Product(s)