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ST7MC1 数据表(PDF) 149 Page - STMicroelectronics

部件名 ST7MC1
功能描述  8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI
PDF  308 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST7MC1 数据表(HTML) 149 Page - STMicroelectronics

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MOTOR CONTROLLER (Cont’d)
10.6.6.3 D Event detection
In sensorless mode, the D Window Filter becomes
active after each C event. It blanks out the D event
during the time window defined by the DWF[3:0]
bits in the MDFR register (see Table 26). The reset
value is 200µs.
This Window Filter becomes active after both
hardware and software C events.
The D Event Filter becomes active after the D Win-
dow Filter. It counts the number of consecutive D
events up to a limit defined by the DEF[3:0] bits in
the MDFR register. The reset value is 1. The D bit
is set when the counter limit is reached.
Sampling is done at a selectable frequency
(fSCF ), see Table 82.
The D event filter is active only for a hardware D
event (DH). For a simulated (DS) event, it is forced
to 1.
Figure 79. D Window and Event Filter Flowchart
Note: Times are indicated for 4 MHz fPERIPH
Table 27. D Event filter Setting
C
No
End of
Blanking Window
?
D
Event
?
Sampling
Limit=1?
Reset counter
Increment counter
Set the D bit
Counter=Limit?
No
No
Yes
Yes
No
Yes
WINDOW
FILTER
EVENT
FILTER
Yes
DWF3 DWF2 DWF1 DWF0
C to D window fil-
ter in Sensorless
Mode (SR=0)
SR=1
00
00
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
30 µs
0
1
1
0
35 µs
0
1
1
1
40 µs
1
0
0
0
60 µs
1
0
0
1
80 µs
1
0
1
0
100 µs
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
DEF3 DEF2 DEF1 DEF0
D event Limit
SR=1
0
000
1
0
001
2
0
010
3
0
011
4
0
100
5
0
101
6
0
110
7
0
111
8
1
000
9
1
001
10
1
010
11
1
011
12
1
100
13
1
101
14
1
110
15
1
111
16
1



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