KMA310 datasheet(25/71 Pages) NXP

25 / 71 page

NXP Semiconductors

KMA310

Programmable angle sensor IC

KMA310

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Product data sheet

Rev. 3 — 27 February 2019

25 / 71

be masked with the mask BIST completion check bit of the ASIL_SETTING register;

see Table 51.

10.5.3.3 BIST encoding check (SM-08)

The ASIL control module provides the test sequence number for all implemented

self-tests. To prove that this module is running normal, the state register of the ASIL

control module is coded with a parity bit to prevent single bit failures.

In case the ASIL control block fails, the product goes into diagnostic mode, even if

the angle data path is not directly affected from this failure mode. This status flag can

be masked with the mask BIST encoding check bit of the ASIL_SETTING register;

see Table 51.

10.5.3.4 SD-ADC range check (SM-09)

The SD-ADC is not using full scale range. Some part is reserved to detect overflows.

In case the filter result is larger than 95 % (including the gain factor) the overflow flag

is set. This status flag can be masked with the mask SD-ADC range check bit of the

ASIL_SETTING register; see Table 51.

10.5.3.5 Data adder check (SM-10)

The pre-CORDIC adder is used for AMR offset cancelation, new AMR offset value

calculation, and temperature calculation from the auxiliary ADC. In case overflow occurs,

the bit is set. This status flag can be masked with the mask data adder check bit of the

ASIL_SETTING register; see Table 51.

10.5.3.6 CORDIC range check (SM-11)

The CORDIC block, which is used for angle calculation, is using internally more than

16 bit. To prevent a wrap-around for unexpected sin/cos input signals, the block has a

built-in overflow monitor. In case overflow occurs, a status flag is set. This status flag

can be masked with the mask CORDIC range check bit of the ASIL_SETTING register;

see Table 51.

10.5.3.7 Angular range check (SM-12)

The clamp control checks the plausibility of the internal status flags coming from the

clamp and range detection. In case the clamp switch angle position was detected before

the range position, the flag is set. This status flag can be masked with the mask angular

range check bit of the ASIL_SETTING register; see Table 51.

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