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参数资料
型号： ST72T141K2MARE
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO34
封装： 0.300 INCH, LEAD FREE, PLASTIC, SOP-34
文件页数： 98/131页
文件大小： 3096K
代理商： ST72T141K2MARE
ST72141K2-Auto
69/131
MOTOR CONTROLLER (Cont’d)
Table 31. Multiplier Result
CONTROL REGISTER B (MCRB)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:6 = VR[1:0]: BEMF/demagnetization Refer-
ence threshold
These bits select the VREF value as shown in the
following table.
Bit 5 = CPB*: Compare Bit for Zero-crossing de-
tection.
0: Zero crossing detection on falling edge
1: Zero crossing detection on rising edge
Bit 4 = HDM*: Hardware Demagnetization event
Mask bit
0: Hardware Demagnetization disabled
1: Hardware Demagnetization enabled
Bit 3 = SDM*: Software Demagnetization event
Mask bit
0: Software Demagnetization disabled
1: Software Demagnetization enabled
Bits 2:0 = OS2*,OS[1:0]: Operating output mode
Selection bits
Refer to the Step behavior diagrams (Figure 39,
Figure 40, Figure 41) and Table 32.
These bits are used to configure the various PWM
output configurations.
Note: The OS2 bit is the only one with a preload
register.
Table 32. Step Behavior Summary
Note: For more details, see Step behavior dia-
grams (Figure 39, Figure 40, and Figure 41).
* Preload bits, new value taken into account at
next C event.
DCB bit
Commutation Delay
0
MCOMP = MWGHT x MZPRV / 32
1
MCOMP = MWGHT x MZREG / 32
7
0
VR1
VR0
CPB*
HDM*
SDM*
OS2*
OS1
OS0
VR1
VR0
VREF Voltage threshold
0
0.2V
0
1
0.6V
1
0
1.2V
1
2.5V
Mode
OS2
bit
PWM after C
and before D
OS
[1:0]
bits
PWM after D and
before C
V
o
ltage
mode(V0C1
=
0)
Senso
rless
(SR
=
0)
0
Same as
after D and
before C
00
On even
channels
01
On odd
channels
10
Continuous
11
All active
channels
1
Alternate
00
On even
channels
01
On odd
channels
10
Alternate odd/even
11
All active
channels
Sensor
(SR
=
1)
x
Unused
00
On even
channels
01
On odd
channels
10
Alternate odd/even
11
All active
channels
Current
mode
(V0C1
=
1)
Sensorless
(S
R
=
0)
0
On even
Channels
00
On even
channels
01
On odd
channels
10
Alternate odd/even
11
All active
channels
1
On odd
channels
00
On even
channels
01
On odd
channels
10
Alternate odd/even
11
All active
channels
Sensor
(SR
=
1)
x
Unused
00
On even
channels
01
On odd
channels
10
Alternate odd/even
11
All active
channels
相关PDF资料
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