FXPS7115D4 datasheet(23/72 Pages) NXP

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NXP Semiconductors

FXPS7115D4

Digital absolute pressure sensor, 40 kPa to 115 kPa

FXPS7115D4

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Product data sheet

Rev. 3 — 5 December 2019

23 / 72

7.5.3.2.2 Register write response message format

Table 18. 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 bit field descriptions

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

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

"Exception handling". The sensor data included in the response is the sensor data at the

falling edge of SS_B for the sensor data request response.

7.5.3.3.1 Sensor data request command message format

Table 20. Sensor data request command 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

Fixed bits: must = 0 0000h

8-bit CRC

C[3:0]

CRC[7:0]

Table 21. Sensor data request command message bit field descriptions

Bit field

Definition

C[0]

Sensor data request command = '1'

C[3:1] = SOURCEID[2:0]

Source identification code for the requested sensor data

CRC[7:0]

8-bit CRC

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