KMA310 datasheet(17/71 Pages) NXP

17 / 71 page

NXP Semiconductors

KMA310

Programmable angle sensor IC

KMA310

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Product data sheet

Rev. 3 — 27 February 2019

17 / 71

Table 29. OEM_CODE_7[11:0] – OEM code 7 message

8-bit ID

12-bit code

Definition

Comment

96h

000h to FFFh

OEM code 7

user-programmable data content

Table 30. OEM_CODE_8[11:0] – OEM code 8 message

8-bit ID

12-bit code

Definition

Comment

97h

000h to FFFh

OEM code 8

user-programmable data content

8.11 SENT diagnostic

The SENT standard specifies different methods to transmit diagnostic information. These

methods are used in multiple combinations, depending on the SENT revision, protocol

format, and device configuration.

8.11.1 STATUS nibble diagnostic

Bit 0 and bit 1 of the STATUS nibble can be used to signal the diagnostic state while

the DATA nibbles still contain an angular value at the same time. The CRC nibble does

not include the STATUS nibble, thus the receiver do not detect an erroneous STATUS

nibble.

8.11.1.1 Diagnostic bit

The device defines bit 0 of the STATUS nibble as diagnostic bit. In case the device is in

diagnostic mode the diagnostic bit is set to logic 1.

The diagnostic bit can be disabled and permanently set to logic 0 via the mask STATUS

nibble bits in the SENT_SETTING2 register in the non-volatile memory; see Table 51.

8.11.1.2 Pre-warning bit

Bit 1 is a pre-warning indication which is set while the device is still in normal mode, but

one of the following conditions occurred:

• The angular value is above the programmed upper out of range (OOR) threshold;

see Table 53.

• The angular value is below the programmed lower OOR threshold; see Table 53.

• Corrected single-bit error of the non-volatile memory (EDC); see Section 10.1.

• The temperature is above the programmed temperature threshold; see Table 51.

• Overvoltage: The supply voltage is above the programmed upper voltage threshold;

see Table 51.

• Undervoltage: The supply voltage is below the programmed lower voltage threshold;

see Table 51.

The pre-warning bit can be disabled and permanently set to logic 0 via the mask

STATUS nibble bits in the SENT_SETTING2 register in the non-volatile memory;

see Table 51.

8.11.2 Fast channel diagnostic value

Some protocol formats define a reserved data range in the fast channel communication

for signaling diagnostic status instead of an angular value in the SENT transmission.

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