MLX90316_05 Datasheet, PDF (19/34 Pages) List of Unclassifed Manufacturers – Rotary Position Sensor IC

MLX90316
Rotary Position Sensor IC
15. MLX90316 Self Diagnostic
The MLX90316 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)
Action
CPU Reset #^'*&
Enter Endless Loop:
- Progress (watchdog
Acknowledge)
- Set Outputs in Diagnostic low
CPU Reset
Effect on Outputs
Diagnostic low #^'+&
Immediate Diagnostic low
Diagnostic low
Calibration Data CRC Error
(Start-Up)
Hamming Code Recovery
Hamming Code Recovery Error
(Start-Up)
Calibration Data CRC Error
(Operation - Background)
Dead Zone
ADC Clipping
(ADC Output is 0000h or
7FFFh)
Radius Overflow ( > 100% ) or
Radius Underflow
( < 50 % )
Fine Gain Clipping
(FG < 0d or > 63d)
Rough Offset Clipping
(RO is < 0d or > 127d)
Rough Gain Clipping
(RG < RGTHRESLOW or RG >
RGTHRESHIGH)
DAC Monitor (Digital to Analog
converter)
ADC Monitor (Analog to Digital
converter)
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 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
Set Outputs in Diagnostic low.
Normal Mode with immediate
recovery without CPU Reset
MLX90316 Fault Mode continue…
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
Immediate Diagnostic low
Remark
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
Immediate recovery if the
“dead zone” is left
(50 % - 100 %)
No magnet / field too high
ADC Inputs are Shorted
3901090316
Rev. 001
Page 19 of 34
Data Sheet
4 October 05