MLX90366

Triaxis



Position Sensor Assembly feat. SENT

MLX90366

Page 16 of 34

Datasheet

Rev. 1.0

25/Jun/13

13.

SENT output Protocol

13.1. Generality

The MLX90366 complies with the sub-set

“A.3 Single Secure Sensors” of the norm J2716 Revised

JAN2010, but one restriction: the mode without pause pulse is not featured.

13.2. Single Secure Fast Channel

MLX90366 delivers SENT frames according the Single Secure format. This format is explicitly described

in this section.

13.2.1. Frame Content

The MLX90366 SENT frames have 6 data nibbles, and are formatted according the below table. The

optional Pause Pulse is however always present so that every messages have the same fixed length.

SENT Frame : Status

D1-MSN D1-MidN D1-LSN

D2-MSN D2-MidN D2-LSN CRC

Optional Pause

Status[0]

Channel 1 indicator ( "1" = error, "0" otherw ise )

Status[1]

0

Status[2]

Enhanced Serial Message

Status[3]

Enhanced Serial Message

CRC

Enhanced CRC (the legacy CRC is not featured)

D1

12 bit angle

D2-MSN

D2-MSN=Rolling Counter-MSN

D2-MidN

D2-MidN=RollingCounter-MidN

D2-LSN

D2-LSN=Inv erted copy of D1-MSN

13.2.2. Diagnostic Reporting through the fast channel

13.2.2.1. Diagnostic Reporting, bit Status[0]

The bit Status[0] is high whenever the three following conditions are met:

1. A diagnostic (analog/environmental) detects an error *

2. The reporting of the above error is enabled **

3. The debouncing time has elapsed.

* A diagnostic of type digital cause the circuit to switch in fail-safe-mode

** See EEPROM bits EE_DIAG_SETTINGS

13.2.2.2. Diagnostic Reporting, Channel 1

The diagnostic can be reported through the 12 bit payload of channel 1, and not only through the status

bit Status[0].

The EEPROM parameters EE_ERRORCODE controls the diagnostic reporting through channel 1 as

follow: