FXLS90130 datasheet(75/247 Pages) NXP

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NXP Semiconductors

FXLS9xxx0

Single channel inertial sensor

DATASIZE

SPI data field size

12-bits

16-bits

Table 129. SPI data field size bit (DATASIZE)

In DSI3 mode, the DATASIZE bit is readable and writable, but has no impact on device

operation or performance.

In PSI5 mode, the DATASIZE bit is readable and writable, but has no impact on device

operation or performance.

In I2C mode, the DATASIZE bit is readable and writable, but has no impact on device

operation or performance.

11.2.20.3 SPI CRC length and seed bits (SPI_CRC_LEN[1:0], SPICRCSEED[3:0])

The SPI_CRC_LEN[1:0] bits select the CRC length for SPI mode as shown in Table 130.

The SPI CRC seed bits contain the seed used for the SPI Mode. The default SPI CRC is

an 8-bit. When the SPI_CRC_LEN[1:0] bits are set to a non-zero value using a register

write command, the SPI CRC changes as defined in the table. The new polynomial value

is enabled for both MISO and MOSI on the next SPI mode command.

The default seed (SPICRCSEED[3:0] = 0x0) is 0xFF for an 8-bit CRC. When the value

is changed to a non-zero value using a register write command, the SPI CRC seed

changes to the value programmed as shown in the table. The new seed value is enabled

for both MISO and MOSI on the next SPI mode command.

SPI_CRC_

LEN[1:0]

SPICR

CSEED

CRC polynomial

CRC seed

1111, 1111

Non-Zero

x8 + x5 + x3 + x2 + x + 1

1111,

SPICRCSEED[3:0]

1010

Non-Zero

x4 + 1

SPICRCSEED[3:0]

111

Non-Zero

x3 + x + 1

SPICRCSEED[2:0]

111

Non-Zero

x3 + x + 1

SPICRCSEED[2:0]

Table 130. SPI CRC length and seed bits (SPI_CRC_LEN[1:0], SPICRCSEED[3:0])

In PSI5 mode, the SPI CRC bits are readable and writable, but have no impact on device

operation or performance.

In DSI3 mode, the SPI CRC bits are readable and writable, but have no impact on device

operation or performance.

In I2C mode, the SPI CRC bits are readable and writable, but have no impact on device

operation or performance.

FXLS9xxx0

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

Product data sheet

Rev. 6 — 8 February 2021

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