ST7FMC1M2T3 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST7FMC1M2T3
STMicroelectronics
ST7FMC1M2T3 Datasheet PDF : 309 Pages
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ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
10.6.6.4 Z Event Detection
In sensorless mode, the Z window filter becomes
active after each D event. It blanks out the Z event
during the time window defined by the ZWF[3:0]
bits in the MZFR register (see Table 28). The reset
value is 200µs. This Window Filter becomes active
after both hardware and software D events.
The Z Event Filter becomes active after the Z Win-
dow Filter. It counts the number of consecutive Z
events up to a limit defined by the ZEF[3:0] bits in
the MZFR register. The reset value is 1. The Z bit
is set when the counter limit is reached.
Sampling is done at a selectable frequency
(fSCF), see Table 82.
The Z event filter is active only for a hardware Z
event (ZH). For a simulated (ZS) event, it is forced
to 1. Z event filter is also active in sensor mode.
Figure 80. Z Window and Event Filter Flowchart
D
No
End of
Blanking
Window
?
Yes
Sampling
No
Z
Event
?
WINDOW
FILTER
EVENT
FILTER
Yes
Reset counter
No
Increment counter
No
Counter=Limit?
Limit=1?
Yes
Yes
Set the Z bit
Table 28. Z Window filter Setting
D to Z window fil-
ZWF3 ZWF2 ZWF1 ZWF0 ter in Sensorless SR=1
Mode (SR=0)
0
0
0
0
5 µs
0
0
0
1
10 µs
0
0
1
0
15 µs
0
0
1
1
20 µs
0
1
0
0
25 µs
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
30 µs
35 µs
40 µs
60 µs
80 µs
100 µs
No
Win-
dow
Filter
after
D
event
1
0
1
1
120 µs
1
1
0
0
140 µs
1
1
0
1
160 µs
1
1
1
0
180 µs
1
1
1
1
200 µs
Note: Times are indicated for 4 MHz fPERIPH
Table 29. Z Event filter Setting
ZEF3 ZEF2 ZEF1 ZEF0
Z event Limit
0
0
0
0
1
0
0
0
1
2
0
0
1
0
3
0
0
1
1
4
0
1
0
0
5
0
1
0
1
6
0
1
1
0
7
0
1
1
1
8
1
0
0
0
9
1
0
0
1
10
1
0
1
0
11
1
0
1
1
12
1
1
0
0
13
1
1
0
1
14
1
1
1
0
15
1
1
1
1
16
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