FXLS93421 datasheet(165/254 Pages) NXP

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NXP Semiconductors

FXLS9xxxx

Dual channel inertial sensor

Sensor data field value

s[3:0]

Description

DEVSTAT state

SUP_ER-R_DIS state

Error

priority

STATUS field size = 4

STATUS field size = 0

0 0 1 1 Oscillator Training Error

Bit set in

DEVSTAT3

N/A

Sensor Data

The Sensor Data Field Error Code is transmitted for

a minimum of one transmission

0 1 0 0 Offset Error

Bit set in

CHx_STAT:

SIGNALCLIP or

OFFSET_ERR

N/A

Sensor Data

The Sensor Data Field Error Code is transmitted for

a minimum of one transmission

0 1 0 1 Temperature Error

Bit set in

DEVSTAT2

N/A

Sensor Data

The Sensor Data Field Error Code is transmitted for

a minimum of one transmission

0110 to 0111 RESERVED

N/A

9.10

Sensor Data

The Sensor Data Field Error Code is transmitted for

a minimum of one transmission

1 0 0 0 User OTP Memory Error

(UF2)

U_OTP_ERR set

in DEVSTAT2

N/A

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

1 0 0 1 User R/W Memory Error

(UF2)

U_RW_ERR set

in DEVSTAT2

N/A

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

1 0 1 0 NXP OTP Memory Error

F_OTP_ERR set

in DEVSTAT2

N/A

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

1 0 1 1 Test Mode Active

TESTMODE bit

set in DEVSTAT

N/A

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

No Response until the supply monitor timer expires

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

(See Section 11.2.2.5)

1 1 0 0 Supply Error

Bit set in

DEVSTAT1

No Response until the supply monitor timer expires

(See Section 11.2.2.5)

1 1 0 1 Reset Error

DEVRES Set

N/A

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

1110 to 1111 RESERVED

N/A

1, 2

The Sensor Data Field Error Code is transmitted for a minimum of one

transmission

Table 254. Periodic data collection mode status field definition...continued

12.4.2.3 Error checking

The device calculates a CRC on the entire response. Message data is entered into the

CRC calculator MSB first, consistent with the transmission order of the message.

The CRC Encoding procedure is:

1. A seed value is preset into the least significant bits of the shift register.

2. Using a serial CRC calculation method, the transmitter rotates the transmitted

message into the least significant bits of the shift register, MSB first.

3. Following the transmitted message, the transmitter feeds eight zeros into the shift

4. When the last zero is fed into the input adder, the shift register contains the CRC.

5. The CRC is transmitted.

The CRC polynomial and seed for periodic data collection mode are shown in Table 255.

Mode

Default polynomial

Non-direct seed

Periodic Data Collection Mode

x8 + x5 + x3 + x2 + x + 1

0000, SOURCEID_x[3:0]

Table 255. Periodic data collection mode response CRC

Some example CRC calculations are shown in Table 256.

Source

identification

(4 Bits)

Keep alive

counter (2 Bits)

Status (4 Bits)

Sensor data

(10 Bits)

Non-direct seed

8-bit CRC

0x1

0x3

0x0

0x1FF

0x01

0xD6

Table 256. Periodic data collection mode - CRC calculation examples

FXLS9xxxx

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

Product data sheet

Rev. 6 — 8 February 2021

165 / 254

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