L9663 datasheet(31/106 Pages) STMICROELECTRONICS

31 / 106 page

DS11401 Rev 6

31/106

L9663

Satellite interface

105

In case of sensor or channel fault conditions, the following codes are sent in the first 10 bits

of the data field. The lower 10 bits are filled with '0'.

If more than one data is present, the faults are handled with this priority scale:

In synchronous communication mode each sensor (time slot) has its own range in the data

buffer. The buffer range content is overwritten if new data arrives before the old data has

been read out.

SensorData5

Buffer Empty

D51

D52

SensorData6

Buffer Empty

D61

D62

Table 6. Error codes in sensor communication

Error Code

Definition

1FC

Manchester error (non-valid start bits, incorrect number of bits

received, timing violation)

1F8

Parity / CRC error(1)

1. Used only in case the CRC check computation is assigned to the IC (CRC_CK bit set to 1); otherwise the

sensor data will be written in the buffer.

1F1

Physical layer error (short to ground, leakage to GND, over-

temperature, open load)

1F0

Data buffer empty

1F2

Short to battery

1F9

Sync pulse error

Table 7. Faults priority

Priority

Data

Fault type

Code

1 (highest)

Valid data

Over Temperature

channel

1F1

Short To Ground

channel

1F1

Short To Battery

channel

1F2

Leakage To Ground

channel

1F1

Open Load

channel

1F1

Manchester Error

Sensor related

1FC

CRC/Parity Error

Sensor related

1F8

Sync Pulse under voltage

(both Slow Vsync detection

and sync UV faults)

channel

1F9

Data Buffer Empty

Sensor related

1F0

Table 5. Time (t0-t2) vs SensorData (continued)

Time/Sensor

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