mlx90333 Melexis Company, mlx90333 Datasheet - Page 29

• Manufacturer Part Number: mlx90333
• Description: Triaxis? 3d-joystick Position Sensor
• Manufacturer: Melexis Company

15.
The MLX90333 provides numerous self-diagnostic features. Those features increase the robustness of the IC
functionality as it will prevent the IC to provide erroneous output signal in case of internal or external failure
modes (“fail-safe”).
ROM CRC Error at start up
(64 words including Intelligent
Watch Dog - IWD)
ROM CRC Error (Operation -
Background task)
RAM Test Fail (Start up)
Calibration Data CRC Error
(Start-Up)
Hamming Code Recovery Error
(Start-Up)
Calibration Data CRC Error
(Operation - Background)
Dead Zone Alpha
Dead Zone Beta
ADC Clipping
(ADC Output is 0000h or
7FFFh)
Radius Overflow ( > 100% ) or
Radius Underflow
( < 50 % )
Field Clipping
(Radius < FIELDTHRES_LOW
or Radius >
FIELDTHRES_HIGH)
Rough Offset Clipping
(RO is < 0d or > 127d)
Gain Clipping
(Gain < GAINMIN or GAIN >
GAINMAX)
DAC Monitor (Digital to Analog
converter)
MLX90333 Fault Mode continues…
16
17
3901090333
Rev. 001
CPU reset means
Refer to section 7 for the Diagnostic Output Level specifications
MLX90333 Self Diagnostic
1.
2.
3.
4.
Core Reset (same as Power-On-Reset). It induces a typical start up time.
Periphery Reset (same as Power-On-Reset)
Fault Flag/Status Lost
The reset can be disabled by clearing the RESONFAULT bit (See 14.7.1)
CPU Reset
Enter Endless Loop:
- Progress (watchdog
Acknowledge)
- Set Outputs in Diagnostic low
CPU Reset
Hamming Code Recovery
CPU Reset
CPU Reset
Set Outputs in Diagnostic low.
Normal Operation until the “dead
zone” is left.
Set Outputs in Diagnostic low
Normal mode and CPU Reset If
recovery
Set Outputs in Diagnostic low
Normal mode and CPU Reset If
recovery
Set Outputs in Diagnostic low
Normal mode, and No CPU Reset
If recovery
Set Outputs in Diagnostic low
Normal mode, and CPU Reset If
recovery
Set Outputs in Diagnostic low
Normal mode, and CPU Reset If
recovery
Set Outputs in Diagnostic low.
Normal Mode with immediate
recovery without CPU Reset
(16)
Action
Page 29 of 43
Tria ⊗ is ™ 3D-Joystick Position Sensor
Diagnostic low
Immediate Diagnostic low
Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Immediate Diagnostic low
Effect on Outputs
(17)
MLX90333
All the outputs are already
in Diagnostic low - (start-up)
All the outputs are already
in Diagnostic low (start-up)
Start-Up Time is increased
by 3 ms if successful
recovery
See 14.7.2
Immediate recovery if the
“dead zone” is left
(50 % - 100 %)
No magnet / field too high
See also 14.5.2
See also 14.5.2
Data Sheet
Remark
Jan 08