MLX90365 Datasheet, PDF (26/35 Pages) Melexis Microelectronic Systems – Triaxis® Position Sensor IC

MLX90365
Triaxis® Position Sensor IC
15. MLX90365 Self Diagnostic
The MLX90365 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”).
Diagnostic Item
Start-up phase Diagnostics
RAM March C- 10N Test
Watchdog BIST
FieldTooLow,
W/ Programmable Threshold
FieldTooHigh
w/ Programmable Threshold
WeakMagnet Diagnostic
Under Voltage Monitoring
SUPPLYMONI =
(MT3VB) OR (MT4VB)
Over Voltage Monitoring
MT7V
Back-Ground Loop Diag.
ROM 16bit checksum
( continuous )
RAM Test
( continuous )
EEPROM 8 bit CRC Check
(continuous)
Watchdog
( continuous )
DSP Loop Diag.
Action
Effect on Outputs
Fail-safe mode **
** CPU reset after
120ms
Fail-safe mode **
** CPU reset after
120ms
Diagnostic
( No Debouncing )
Diagnostic
( No Debouncing )
Diagnostic
( No Debouncing )
Start-up on Hold **
** CPU reset after
120ms
PTC entry
Diagnostic low/ high
Reporting (optional)
Diagnostic low/ high
Reporting (optional)
Diagnostic low/high
Reporting (optional)
Diagnostic low/high
Reporting (optional)
Diagnostic low/high
Reporting (optional)
Diagnostic low/high
Output in High-Impedance
Fail-safe mode **
** CPU reset after
120ms
Fail-safe mode **
** CPU reset after
120ms
Fail-safe mode **
** CPU reset after
120ms
CPU reset
Diagnostic low//high
Reporting (optional)
Diagnostic low//high
Reporting (optional)
Diagnostic low/high
Reporting (optional)
--
Type
Digi HW
Digi HW
Environ
&Analog
Environ
&Analog
Environ
Environ
&Analog
Environ
Digi HW
Digi HW
Digi HW
Digi HW
Monitoring Rate
Reporting Rate
n/applicable
(start-up only)
n/applicable (start-up only)
n/applicable
(start-up only)
n/applicable (start-up only)
n/applicable
(start-up only)
n/applicable
(start-up only)
n/applicable
(start-up only)
n/applicable
(start-up only)
n/applicable (start-up only)
n/applicable (start-up only)
n/applicable (start-up only)
n/applicable (start-up only)
n/applicable
(start-up only)
n/applicable (start-up only)
800ms
800ms
160ms
10ms
120ms
160ms
10ms
n/a
ADC Clipping
ADCCLIP
FieldTooLow,
W/ Programmable Threshold
FieldTooHigh
w/ Programmable Threshold
Debouncing
(programmable)
Debouncing
(programmable)
Debouncing
(programmable)
Diagnostic low/high
Reporting (optional)
Diagnostic low/high
Reporting (optional)
Diagnostic low/high
Reporting (optional)
Environ
& Analog
Environ
& Analog
Environ
& Analog
5/DSP
1/DSP
1/DSP
6ms
x
Diag_Debounce_Thresh
Diag_Debounce_Stepup
6ms
x
Diag_Debounce_Thresh
Diag_Debounce_Stepup
6ms
x
Diag_Debounce_Thresh
Diag_Debounce_Stepup
MLX90365
Rev. 5.7
Page 26 of 35
Datasheet
Jan. 22, 16