FXPS7115D4 datasheet(18/75 Pages) NXP

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NXP Semiconductors

FXPS7115D4

Digital absolute pressure sensor, 40 kPa to 115 kPa

SCLK

SS_B

MOSI

MISO

SCLK

SS_B

MISO

MOSI

phase two response

phase one: response-previous command

phase one: command

aaa-023747

Figure 20. Standard 32 Bit SPI protocol timing diagram

7.5.1 SPI command format

There are two SPI commands as shown in Table 10. These are the Register Access

command and the Sensor Data command.

The Register Access command is a standard SPI read and write command which access

the registers and are defined by field descriptions shown in Section 7.5.3.1 through

Section 7.5.3.2.

The Sensor Data command provides additional information such as basic and detailed

sensor status if needed as defined by field descriptions shown in Section 7.5.3.3.

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

Fixed bits:

must = 0h

8-bit CRC

C[3:0]

RA[7:1]

RA[0]

RD[7:0]

CRC[7:0]

Sensor data command

Command

Fixed bits: must = 0 0000h

8-bit CRC

C[3:0]

CRC[7:0]

Table 10. SPI command format

FXPS7115D4

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Product data sheet

Rev. 6 — 6 June 2022

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