ST7FMC1K2B3 STMICROELECTRONICS [STMicroelectronics], ST7FMC1K2B3 Datasheet - Page 151

• Manufacturer Part Number: ST7FMC1K2B3
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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
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
(f
The Z event filter is active only for a hardware Z
event (Z
to 1. Z event filter is also active in sensor mode.
Figure 80. Z Window and Event Filter Flowchart
SCF
), see
Reset counter
H
). For a simulated (Z
Table
No
No
No
Increment counter
Counter=Limit?
82.
Set the Z bit
Sampling
Yes
Blanking
Window
End of
Event
Z
?
D
?
Yes
No
Table
S
) event, it is forced
WINDOW
28). The reset
FILTER
FILTER
EVENT
Yes
Limit=1?
Yes
Table 28. Z Window filter Setting
Note: Times are indicated for 4 MHz f
Table 29. Z Event filter Setting
ZWF3 ZWF2 ZWF1 ZWF0
ZEF3 ZEF2 ZEF1 ZEF0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ST7MC1xx/ST7MC2xx
D to Z window fil-
ter in Sensorless
Mode (SR=0)
100 µs
120 µs
140 µs
160 µs
180 µs
200 µs
10 µs
15 µs
20 µs
25 µs
30 µs
35 µs
40 µs
60 µs
80 µs
Z event Limit
5 µs
10
11
12
13
14
15
16
PERIPH
1
2
3
4
5
6
7
8
9
151/309
SR=1
event
Filter
Win-
after
dow
No
D
1