ADS131M08IPBSR datasheet(30/118 Pages) TI2

30 / 118 page

8.3.13 Register Map CRC

The ADS131M08 performs a CRC on its own register map as a means to check for unintended changes to the

registers. Enable the register map CRC by setting the REG_CRC_EN bit in the MODE register. When enabled,

the device constantly calculates the register map CRC using each bit in the writable register space. The register

addresses covered by the register map CRC on the ADS131M08 are 02h through 30h. The CRC is calculated

beginning with the MSB of register 02h and ending with the LSB of register 30h using the polynomial selected in

the CRC_TYPE bit in the MODE register.

The calculated CRC is a 16-bit value and is stored in the REGMAP_CRC register. The calculation is done using

one register map bit per CLKIN period and constantly checks the result against the previous calculation. The

REG_MAP bit in the STATUS register is set to flag the host if the register map CRC changes, including changes

resulting from register writes. The bit is cleared by reading the STATUS register, or by the STATUS register being

output as a response to the NULL command.

ADS131M08

SBAS950B – OCTOBER 2019 – REVISED FEBRUARY 2021

www.ti.com

Submit Document Feedback

Product Folder Links: ADS131M08

ADS131M08IPBSR Datenblatt(PDF) 30 Page - Texas Instruments