FXPS7115D4 datasheet(21/72 Pages) NXP

21 / 72 page

NXP Semiconductors

FXPS7115D4

Digital absolute pressure sensor, 40 kPa to 115 kPa

If these conditions are met, the register write is executed and the device responds to the register write request

as shown in Section 7.5.3.2.2 "Register write response message format". Otherwise, no register is written and

the device responds with the error response as defined in Section 7.5.2 "SPI response format". The register is

not written until the transfer during which the register write was requested has been completed.

A register write command to a read-only register is not executable, but results in a valid response.

7.5.3.2.1 Register write command message format

MSB: bit 31; LSB: bit 0

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

15 14 13 12 11 10 9

Command

C[3:0]

Fixed bits:

must = 0h

8-bit CRC

RA[7:1]

RA[0]

RD[7:0]

CRC[7:0]

Table 17. Register write command message format

Bit field

Definition

C[3:0]

RA[7:0]

RA[7:1] contains the byte address of the register to be written

RD[7:0]

RD[7:0] contains the data byte to be written to address RA[7:0]

CRC[7:0]

8-bit CRC

Table 18. Register write command message bit field descriptions

7.5.3.2.2 Register write response message format

MSB: bit 31; LSB: bit 0

31 30 29 28 27

26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9

Command

C[0], [3:1]

Basic

Status

Unused

Data

of RA[7:1] high byte

of RA[7:1] low byte

8-bit CRC

ST[1:0]

RD[15:8]

RD[7:0]

CRC[7:0]

Table 19. Register write response message format

Bit field

Definition

C[0], [3:1]

ST[1:0]

Status

RD[15:8]

The contents of the register addressed by RA[7:1] high byte (RA[0] = 1)

RD[7:0]

The contents of the register addressed by RA[7:1] low byte (RA[0] = 0)

CRC[7:0]

8-bit CRC

Table 20. Register write response message bit field descriptions

7.5.3.3 Sensor data request commands

The device supports standard sensor data request commands. The sensor data request command format is

described in Section 7.5.3.3.1 "Sensor data request command message format". The response to a sensor

data request is shown in Section 7.5.3.3.2 "Sensor data request response message format". The response

is transmitted on the next SPI message subject to the error handling conditions specified in Section 7.5.5

FXPS7115D4

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6.2 — 28 June 2023

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