MLX90363 Datasheet, PDF (34/57 Pages) Melexis Microelectronic Systems – Triaxis® Magnetometer IC With High Speed Serial Interface

MLX90363
Triaxis® Magnetometer IC
With High Speed Serial Interface
#7 6 5 4 3 2 1 0 # 7 6 5 4 3 2 10
1
0
3
CHALLENGE KEY [15:8]
2
CHALLENGE KEY [7:0]
5
4
7
CRC
611000100
Table 39 – EEPROMWrite EEChallenge Slave-Out Message (Opcode = 4)
• The parameter ChallengeKey is randomly generated by the sensor, and should be echoed
because of the next command
#7 6 5 4 3 2 1 0 # 7 6 5 4 3 2 10
1
0
3
KEY ECHO [15:8]
2
KEY ECHO [7:0]
5
INVERTED KEY ECHO [15:8]
4
INVERTED KEY ECHO [7:0]
7
CRC
611000101
Table 40 – EEPROMWrite ChallengeAns Slave-In Message (Opcode = 5)
• The parameter KeyEcho should match ChallengeKey exor’ed with 0x1234.
• The parameter InvertedKeyEcho should match KeyEcho after bit reversal.
#7 6 5 4 3 2 1 0 # 7 6 5 4 3 2 10
1
0
3
2
4
4
7
CRC
611101000
Table 41 – EEReadAnswer Slave-Out Message (Opcode = 40)
#7 6 5 4 3 2 1 0 # 7 6 5 4 3 2 10
1
0
CODE
3
2
4
4
7
CRC
611001110
Table 42 – EEPROMWriteStatus Slave-Out Message (Opcode = 14)
• The parameter Code details the exact cause of EEPROM write failure
Code
1
2
4
6
7
8
Description of EEPROM Write Failure
Success
Erase/Write Fail
EEPROM CRC Erase/Write Fail
Key Invalid
Challenge Fail
Odd Address
The command Reboot must be sent after a series of EEPROM writes, to make sure that the new
EEPROM parameters are taken into account.
3901090363
Rev. 005
Page 34 of 57
Data Sheet
Jul/13