KMA310 datasheet(7/71 Pages) NXP

7 / 71 page

NXP Semiconductors

KMA310

Programmable angle sensor IC

KMA310

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Product data sheet

Rev. 3 — 27 February 2019

7 / 71

aaa-008183

Figure 5. SENT frame

8.2 SYNC nibble

The synchronization and calibration nibble is always 56 clock ticks long. The receiver

uses the SYNC nibble to derive the clock tick time from the SENT frame.

8.3 STATUS nibble

The STATUS nibble contains status and slow channel information of the KMA310.

Bit 0 reflects the operating mode, i.e. normal or diagnostic mode. Bit 1 is a pre-warning

indication and is set while the device is still in normal mode. For a detailed description of

the pre-warning bit, see Section 8.11.1.2.

Bit 2 and bit 3 are used for optional slow channel serial data messages using the

enhanced serial protocol (ESP), described in Section 8.10.

Table 5. STATUS nibble

Bit

Description

3 [most significant bit (MSB)]

serial data message bit if ESP is enabled, otherwise logic 0

pre-warning[1]

0b – normal operation

1b – pre-warning condition

0 [least significant bit (LSB)]

operating mode[2]

0b – normal operation

1b – diagnostic condition[3]

[1]

Bit 1 can be permanently set to logic 0 via register bit; see Table 51.

[2]

Bit 0 can be permanently set to logic 0 via register bit; see Table 51.

[3]

Enable the serial data communication for detailed diagnostic information; see Table 14 and Table 15.

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