MLX90609 Datasheet, PDF (13/22 Pages) List of Unclassifed Manufacturers – Angular Rate Sensor (Standard version)

MLX90609
Angular Rate Sensor (Standard version)
5.3.1 ADC Instructions and Answers
There are three SPI commands that are used to control embedded ADC of the MLX90609: STATR,
ADCC and ADCR.
• The Refusal Answer
Every instruction sent to the MLX90609 has an answer. If the MLX90609 is not able to accept the
instruction a refusal answer will be transmitted out. This answer has a unique format which is
shown in the Table 7. The refusal answer is the only one that has a set MSB. The other bits help to
understand a possible reason for the instruction rejection.
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10
1 OPC EOC X
X BUSY
Bit 9
X
Refusal answer
Bit 8 Bit 7 Bit 6
X
X
X
Bit 5
X
Bit 4
X
Bit 3
X
Bit 2
X
Bit 1
X
Bit 0
X
Table 7. Refusal answer format
• Command of the Status Reading (STATR)
Bit 7
1
Bit 6
0
Bit 5
0
Instruction
Bit 4
Bit 3
0
1
Bit 2
0
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10
0
X EOC X
X
X
Bit 9
X
Answer
Bit 8 Bit 7
X
X
Bit 6
X
Bit 5
X
Bit 4
X
Table 8. Format of the STATR command
Bit 1
0
Bit 3 Bit 2
CHAN ADEN
Bit 0
0
Bit 1
X
Bit 0
X
• Command of the ADC Control (ADCC)
Bit 7
1
Bit 6
0
Bit 5
0
Instruction
Bit 4
Bit 3
1
CHAN
Bit 2
ADEN
Bit 1
0
Bit 0
0
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10
0
X EOC X
X
X
Bit 9
X
Answer
Bit 8 Bit 7
X
X
Bit 6
X
Bit 5
X
Bit 4
X
Bit 3
CHAN
Bit 2
ADEN
Bit 1
X
Bit 0
X
Table 9. Format of the ADCC command (The answer is the same as for the STATR command)
• Command of the ADC Reading (ADCR)
Bit 7
1
Bit 6
0
Bit 5
0
Instruction
Bit 4
Bit 3
0
0
Bit 2
0
Bit 1
0
Bit 0
0
Bit15 Bit14
0
X
AD10…AD0
Bit13 Bit12 Bit11 Bit10
EOC X AD10 AD9
Bit 9
AD8
Answer
Bit 8 Bit 7
AD7 AD6
Bit 6
AD5
Bit 5
AD4
A result of the AD-conversion. These bits are valid only when EOC bit is set.
Bit 4
AD3
Bit 3
AD2
Bit 2
AD1
Bit 1
AD0
Bit 0
0
Table 10. Format of the ADCR command
390109060901
Rev 007
Page 13 of 22
Data Sheet
January/08