KMA321 datasheet(12/71 Pages) NXP

12 / 71 page

NXP Semiconductors

KMA321/A

Programmable angle sensor IC

A.1

H.1

D5[1]

D3[2]

12-bit value

Angle

12-bit value Angle/mode

1111

4095

reserved

4095

initialization message

Table 11. DATA nibbles D3 to D5: inverted slope angular value...continued

[1]

MSN.

[2]

LSN.

[3]

For detailed diagnostic information, the serial data communication can be enabled.

For the dual throttle position sensor formats A.1 and H.1, the clamping levels must

be set to the correct values to comply with the SAE J2716 SENT specification.

A.1: CLAMP_HIGH = 4094, CLAMP_LOW = 1. H.1: CLAMP_HIGH = 4088,

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

diagnostic information.

8.9 High-speed 12-bit message format H.3

The KMA321/A generates the sequence defined in Table 12 repeatedly in accordance

with the high-speed 12-bit message format H.3 defined in SAE J2716 APR2016. This

mode realizes almost a doubling of the update rate compared to other modes. The

increase of the update rate is achieved by transmitting 12-bit angular data with only

four DATA nibbles using only 3 bit of the available 4 bit per nibble. The MSB of each

nibble is always zero. Additionally, the clock tick length shall be set to 2.7 µs typically

with a maximum variation of ±10 %. The SYNC, STATUS, and CRC nibble and the serial

communication are the same as for the other protocol formats.

aaa-008204

12-bit message

fast channel

56 ticks

4-bit

3-bit

4-bit

overall message - 131 clock ticks to 187 clock ticks (depending on data values)

Figure 8. High-speed 12-bit message format frame H.3

SYNC

STATUS

DATA0

DATA1

DATA2

DATA3

CRC

D0[1]

D3[2]

diagnostic and

pre-warning

12-bit angular value

Table 12. High-speed 12-bit message format: frame

[1]

MSN.

[2]

LSN.

KMA321_A

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

Product data sheet

Rev. 6 — 18 May 2022

12 / 71

KMA321 Datasheet(PDF) 12 Page - NXP Semiconductors

KMA321 Datasheet(HTML) 12 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