FXPS7115D4 datasheet(26/72 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

26 / 72

Table 29. SPI Response Message CRC

SPICRCSEED[3:0]

Default Polynomial

Default non-direct Seed

0000

x8+ x5+ x3+ x2+ x + 1

1111 1111

nonzero

x8+ x5+ x3+ x2+ x + 1

1111 SPICRCSEED[3:0]

7.5.5 Exception handling

7.5.5.1 Basic status field

All responses include a status field (ST[1:0]) that includes the general status of the

device and transmitted data as described below. The contents of the status field is

a representation of the device status at the rising edge of SS_B for the previous SPI

command.

Table 30. Basic status field for responses to register commands

ST[1:0]

Status

Description

SF[1:0]

Priority

Device in Initialization

Device in initialization (ENDINIT not

set)

Normal Mode

Normal mode(ENDINIT set)

Self-test

Self-test(ST_CTRL[3:0] not equal to

'0000')

Internal Error Present

Detailed Status Field

Detailed

Status Field

7.5.5.2 Error responses

Table 31. Error responses bit field descriptions

SF[1:0]

Status Sources

DEVSTAT State

Oscillator training error (OSCTRAIN_ERR)

Offset error (PABS_HIGH or PABS_LOW or CM_

ERROR)

Temperature error

Bit set in DEVSTAT3

Bit set in DSP_STAT

Bit set in DEVSTAT2

User OTP memory error (UF2 or UF1)

User R/W memory error (UF2)

NXP OTP Memory error

U_OTP_ERR set in DEVSTAT2

U_RW_ERR set in DEVSTAT2

F_OTP_ERR set in DEVSTAT2

Test Mode active

Supply error

Reset error

TESTMODE bit set in DEVSTAT

bit set in DEVSTAT1

DEVRES set

MISO error

SPI error

Bit set in DEVSTAT3

N/A

7.5.5.3 SPI error

The following external SPI conditions result in a SPI error:

• SCLK is high when SS_B is asserted

• The number of SCLK rising edges detected while SS_B is asserted is not equal to 16

• SCLK is high when SS_B is deasserted

• CRC error is detected (MOSI)

• A register write command to any register other than the DEVLOCK_WR register is

received while ENDINIT is set

If a SPI error is detected, the device responds with the error response as described

in Section 7.5.5.2 "Error responses" with the detailed status field set to “SPI Error” as

defined in Section 7.5.5.1 "Basic status field".

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