KMA310 datasheet(24/71 Pages) NXP

24 / 71 page

NXP Semiconductors

KMA310

Programmable angle sensor IC

KMA310

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

Product data sheet

Rev. 3 — 27 February 2019

24 / 71

10.5.2.3 Data division check (SM-03)

The main data path division module is only used in MPC17 mode. Nevertheless,

the integrated data division check uses the same hardware, which is used by the

post-CORDIC. This test performs a test division with a known result. To execute the

data division check, also the post-adder and the post-memory addressing are used.

Furthermore, this check can be switched off separately with the data division check bit of

the ASIL_SETTING register; see Table 51.

In case internal post-memory addressing, post-adder or division fails, the product goes

into diagnostic mode.

10.5.2.4 Data conversion check (SM-04)

The data conversion check checks the CORDIC module, which is used for all modes. For

testing, internal cos and –sin signals are used to calculate an inverted CORDIC angle.

The sum of the main data path CORDIC angle and the inverted CORDIC angle must be

zero. Furthermore, this check can be switched off separately with the data conversion

check bit of the ASIL_SETTING register; see Table 51.

In case internal subblocks of the CORDIC module (shift register, adder, state-controller)

fail, the product goes into diagnostic mode.

10.5.2.5 Adjusted angle calculation check (SM-05)

The zero angle corrected CORDIC signal is one of the most important signals within

the system. This signal is used for the main data path angle value and for the segment

detection for MPC7 and MPC17 mode. The integrated adjusted angle calculation

check compares the post-CORDIC zeroed result with a redundant calculated CORDIC

zeroed signal. The arithmetic logic unit (ALU) ASIL module performs this redundant

calculation. Furthermore, this check can be switched off separately with the adjusted

angle calculation check bit of the ASIL_SETTING register; see Table 51.

In case the redundant calculation of the ALU ASIL check fails, the product goes into

diagnostic mode, even if the angle data path is not directly affected from this failure

mode.

10.5.3 Fixed internal diagnostics

The following internal diagnostics are permanently enabled and automatically executed.

The corresponding flags can be masked individually.

10.5.3.1 Control signal check (SM-06)

Checks, if the main data path processing was performed correctly. This status flag

can be masked with the mask control signal check bit of the ASIL_SETTING register;

see Table 51.

10.5.3.2 BIST completion check (SM-07)

Checks, if all selected self-tests were executed without any errors. In case a failure mode

occurs at one selected test, the BIST completion check flag indicates this failure latest

after 160 µs.

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

KMA310 Datasheet(PDF) 24 Page - NXP Semiconductors

KMA310 Datasheet(HTML) 24 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

Datasheet Download

Link URL