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ST7MC2 Datasheet(PDF) 225 Page - STMicroelectronics

Part # ST7MC2
Description  8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI
PDF  308 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7MC2 Datasheet(HTML) 225 Page - STMicroelectronics

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MOTOR CONTROLLER (Cont’d)
MOTOR Z EVENT FILTER REGISTER (MZFR)
Read/Write
Reset Value: 0000 1111 (0Fh)
Bits 7:4 = ZEF[3:0]: Z Event Filter bits
These bits select the number of valid consecutive
Z events (when the Z event is detected) needed to
generate the active event. Sampling is done at the
selected fSCF frequency (see Table 82.) or at
PWM frequency.
Table 80. Z Event filter Setting
Bits 3:0 = ZWF[3:0]: Z Window Filter bits
These bits select the length of the blanking win-
dow activated at each D event. The filter blanks
the Z event detection until the end of the time win-
dow.
Table 81. Z Window filter Setting
Note: Times are indicated for 4 MHz fPERIPH
76
54
32
10
ZEF3
ZEF2
ZEF1
ZEF0
ZWF3
ZWF2
ZWF1
ZWF0
ZEF3
ZEF2
ZEF1
ZEF0
Z event Samples
00
00
1
00
01
2
00
10
3
00
11
4
01
00
5
01
01
6
01
10
7
01
11
8
10
00
9
10
01
10
10
10
11
10
11
12
11
00
13
11
01
14
11
10
15
11
11
16
ZWF3 ZWF2 ZWF1 ZWF0
D to Z window fil-
ter in Sensorless
Mode (SR=0)
SR=1
00
00
5 µs
No
Win-
dow
Filter
after
D
event
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



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