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TLE5014
GMR-Based Angle Sensor
SICI
6.3
SICI Programming in Bus Mode
In case several sensors (up to 4) are connected in a bus mode with the SPC interface, the EEPROM read/write
via SICI has to be performed in the bus mode configuration. For this purpose, to each individual sensor an
address has to be assigned which is done by the external wiring of the pins IF1, IF2 and IFC on the PCB as
described in the data sheet and in
To address the individual sensors with SICI, one of the following ID_WORD has to be sent according to the
hard-wired sensor ID:
ID=0: ID_WORD = 0x05AC
ID=1: ID_WORD = 0x05A9
ID=2: ID_WORD = 0x05A6
ID=3: ID_WORD = 0x05A3
The following sequence has to be performed to allow an EEPROM read/write via SICI in bus mode. The
commands in blue have to be added to the command sequence described in
reading/writing in bus mode and contain the ID_WORD for sensor addressing: Power on the sensor, wait at
least 10 µs to allow the internal voltages to stabilize:
•
Write unlock word 0x4711 to 0x77 to enable access to the registers:
– WRITE-CMD to 0x77: 0x0771
– DATA: 0x4711 (unlock)
– Read Safety word
•
Set the KEEP_IF bit to ensure the SICI is not disabled after startup:
– WRITE-CMD to 0x6C: 0x06C1
– DATA: 0x4000 (keep SICI after startup)
– Read Safety word
•
Write sensor ID to SICI-DISABLE register at 0x7A:
– WRITE-CMD to 0x7A: 0x47A1
– DATA: ID_WORD
– Read Safety word
•
Wait until startup is finished; refer to the TLE5014 data sheet for power-on time specification
•
For the programming, the internal controller has to be switched off:
– WRITE-CMD to 0x6C: 0x06C1
– DATA: 0xC000
– Read Safety word
•
Now the EEPROM-reading / writing can be entered (see
•
After writing/reading the EEPROM, send a write command to the ACSTAT register (address 0x01) with data
word 0x0001 to trigger a chip reset:
– WRITE-CMD to 0x01: 0x4011
– DATA: 0x0001 (chip reset)
User's Manual
Table 4
of this document.
38
Chapter
7)
Chapter 6.2.4
for
Rev. 1.0
2019-03-12
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