237-00156 SofTec Microsystems SRL, 237-00156 Datasheet - Page 84

• Manufacturer Part Number: 237-00156
• Description: BOARD ISOLATION FOR ST7
• Manufacturer: SofTec Microsystems SRL
• Type: Optoisolation Boardr

Specifications of 237-00156

• Contents: *
• For Use With/related Products: STMicro ST7FMC Motor Control Device
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Parameter Name
Threshold
Voltage
After C Blanking
Window
D Event Counter
Filter
Demagnetization
When using the STMicroelectronics’ patented sensorless BLDC
method, this parameter sets the voltage of the second comparator
input (the voltage to be compared to BEMF, first comparator input
being the BEMF). A list of pre-set values is available.
When using other BEMF sampling methods, requiring the
reconstruction of the motor ground, the external threshold option (“Ext.
Ref.” value) should be selected, and the corresponding hardware
should be implemented on the Motor Control board.
MCRC register, 3 bits from VR2 to VR0.
Protect against noise that may be wrongly interpreted as an End-of-
Demagnetization (D) event. After commutation, there is a time window
during which an End-of-Demagnetization event cannot physically
occur. During this time window there should not be D sampling.
MDFR register, 4 bits from DWF3 to DWF0.
Protects against End-of-Demagnetization (D) spurious information. It’s
possible to detect from 1 to 15 D events before validating the D event.
MDFR register, 4 bits from DEF3 to DEF0.
All Hardware
Parameter Values/Description
The End-of-Demagnetization event is detected
only by hardware.
MCRB register, bit HDM at 1, bit SDM at 0.
AK-ST7FMC User's Manual
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