MLX90363 Datasheet, PDF (18/57 Pages) Melexis Microelectronic Systems – Triaxis® Magnetometer IC With High Speed Serial Interface

MLX90363
Triaxis® Magnetometer IC
With High Speed Serial Interface
14.4. Regular Messages
The MLX90363 offers three types of regular messages:
“α” – diagnostic
“α – β” – diagnostic
X – Y – Z – diagnostic
#7 6 543210#76543210
1
E1
E0
ALPHA [13:8]
0
ALPHA [7:0]
3
0
2
0
5
0
4
VG[7:0]
7
CRC
600
ROLL
Table 5 – “α” message
#7 6 5 4 3 2 1 0 # 7 6 5 4 3 2 10
1 E1 E0
ALPHA [13:8]
0
ALPHA [7:0]
3
BETA [13:8]
2
BETA [7:0]
5
0
4
VG[7:0]
7
CRC
601
ROLL
Table 6 – “α – β” message
#7 6 5 4 3 2 1 0 # 7 6 5 4 3 2 10
1 E1 E0
X COMPONENT [13:8]
0
X COMPONENT [7:0]
3
Y COMPONENT [13:8]
2
Y COMPONENT [7:0]
5
Z COMPONENT [13:8]
4
Z COMPONENT [7:0]
7
CRC
610
ROLL
Table 7 – “X – Y – Z” message
The bits byte6[7] and byte6[6] are markers. They allow the master to recognize the type of regular
message (00b, 01b, 10b). The marker is present in all messages (incoming and outgoing). The marker of
any message which is not a regular message is equal to 11b.
The bits E1 and E0 report the status of the diagnostics (4 possibilities) as described in the Table 8 – See
section 18 for more details.
E1 E0
00
01
10
11
Description
First Diagnostics Sequence Not Yet Finished
Diagnostic Fail
Diagnostic Pass (Previous cycle)
Diagnostic Pass – New Cycle Completed
Table 8 - Diagnostics Status Bits
14.4.1. Note for the regular message “X – Y – Z – diagnostic” (Marker = 2)
In the case of marker = 2, the X,Y,Z components are given after offset compensation and filtering (see
signal processing in section 19.2). These components are gain dependent (see also section 17.6).
3901090363
Rev. 005
Page 18 of 57
Data Sheet
Jul/13