KMA310 datasheet(10/71 Pages) NXP

10 / 71 page

NXP Semiconductors

KMA310

Programmable angle sensor IC

KMA310

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Product data sheet

Rev. 3 — 27 February 2019

10 / 71

Data nibbles D3 and D4 contain an 8-bit loop counter value with wrap-around common

for both protocol formats A.3 and H.4.

Table 8. DATA nibbles D3 and D4: 8-bit loop counter

D3[1]

D4[2] 8-bit loop counter

0000

0000 0

1111

1111 255

[1]

MSN.

[2]

LSN.

For the single secure sensor format H.4 the clamping levels must be set to the correct

values to comply with the SAE J2716 SENT specification: CLAMP_HIGH = 4088,

CLAMP_LOW = 1. Otherwise angular values overwrite the reserved data range for

diagnostic information.

8.8 Dual throttle position sensor formats A.1 and H.1

The KMA310 generates the sequence defined in Table 9 repeatedly in accordance with

the dual throttle position sensor format defined in SAE J2716 JAN2010 SENT appendix

A.1 or H.1 defined in SAE J2716 APR2016.

DATA nibbles D0 to D2 contain the 12-bit angular value. DATA nibbles D3 to D5 contain

the opposite slope of the same 12-bit angular value while also the order of these DATA

nibbles is reversed.

A.1 uses the data range 1 to 4094 for angular values and the values 0 and 4095 for

diagnostic information. While H.1 uses data range 1 to 4088 for angular values and 4090

for diagnostic information.

aaa-008203

12-bit angular value

12-bit inverted slope

angular value

Figure 7. Dual throttle position sensor formats A.1 and H1

KMA310 Datasheet(PDF) 10 Page - NXP Semiconductors