IC-MB3 Datasheet, PDF (19/26 Pages) IC-Haus GmbH – BiSS INTERFACE MASTER, 1-Chan./3-Slaves

iC-MB3
BiSS INTERFACE MASTER, 1-Chan./3-Slaves
STATUS INFORMATION and COMMAND REGISTER
Rev D1, Page 19/26
Address 240: Status Messages
Bit Designation
Function
7 nERR
An error has occurred (low active), equivalent to the pin level at
NER (see "Error messaging" on page 22)
6 nWDERR
Watchdog error (low active) on
- transmissions triggered by an automatic sensor data request
- transmissions of register data
5 reserved
4 nSENSERR
CRC error in the sensor data (low active)
3 nREGERR
CRC error during the transmission of register data (low active)
2 REGEND
End of register data transmission
1 reserved
0 EOT
End of transmission:
signals the end of sensor or register data transmission before
timed out
Remarks
1
4
2
3
4
1. A watchdog error is triggered during the automatic transmission of sensor data if no new cycle could be
initiated; bit AGS in the command register is reset and the automatic request for sensor data aborted. During
the transmission of register data a watchdog error is triggered if the slave shows no response, i.e. if it does
not answer the first falling master edge with a low or fails to generate a start bit.
2. If a sensor data error is signaled the faulty sensor can be verified by reading out address 241 (validity
message).
3. If a register data error is generated the number of bytes transmitted correctly before the error occurred can
be determined by reading out the register message REGBYTES (address 243, bits 5...0). In the event of error
the transmission of data is terminated.
4. Bit is not relevant (don’t care).
Address 241: Validity Messages
Bit Designation
Function
7 reserved
Not used
6 SVALID4
Not used
5 reserved
Not used
4 SVALID3
Readout sensor data from slave 3 valid
3 reserved
Not used
2 SVALID2
Readout sensor data from slave 2 valid
1 reserved
Not used
0 SVALID1
Readout sensor data from slave 1 valid
1. Any attempt to write to this register resets the validity messages.
Remarks
1
1
1
1
1
1
1
1