KMA310 datasheet(20/71 Pages) NXP

20 / 71 page

NXP Semiconductors

KMA310

Programmable angle sensor IC

KMA310

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Product data sheet

Rev. 3 — 27 February 2019

20 / 71

9.3 MPC7 mode

MPC7 in contrast provides a set of six freely selectable calibration points defined by

angular position (linear Xn), output level (linear Yn), and slope (linear Sn) as shown

in Figure 11.

aaa-028145

MPC7

LNR_Y1

LNR_Y5

LNR_Y4

LNR_Y3

LNR_Y2

LNR_X1

LNR_X5

LNR_X4

LNR_X3

LNR_X2

100

180

160

SCALE_COEFFICIENT

RANGE_DETECTION

ZERO_ANGLE

SLOPE = 0

CLAMP_SWITCH

CLAMP_HIGH

CLAMP_LOW

100

120

140

SLOPE_1

SLOPE_2

SLOPE_3

SLOPE_4

SLOPE_5

SLOPE_6

α (deg)

VO/VDD

(%)

Figure 11. MPC7 mode

10 Diagnostic features

KMA310 provides following diagnostic features. The safety mechanisms supporting

functional safety operation are marked with individual numbers SM-xx. Functional risks

are only minimized if all safety mechanisms are enabled as in the default configuration.

Thus it is not recommended to switch them off individually.

10.1 NVM CRC (SM-20), NVM EDC check (SM-21), and NVM ECC check

(SM-22)

The device includes a supervision of the programmed data. At power-on, a CRC of the

non-volatile memory is performed (SM-20). The NVM is split into three customer areas

with individual CRCs (CRC1, CRC2, and CRC3) and a manufacturer area which is user

access restricted and also CRC protected. Furthermore, the memory is protected against

bit errors. Every 16-bit data word is saved internally as a 22-bit word for this purpose.

The protection logic corrects any single-bit error in a data word (SM-22), while the sensor

continues in normal operation mode. Furthermore, the logic detects double-bit error per

word and switches the output into diagnostic mode (SM-21).

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