ST7MC2S6 STMicroelectronics, ST7MC2S6 Datasheet - Page 212
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ST7MC2S6
Manufacturer Part Number
ST7MC2S6
Description
8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
Manufacturer
STMicroelectronics
Datasheet
1.ST7MC1K4.pdf
(309 pages)
Specifications of ST7MC2S6
Hdflash Endurance
100 cycles, data retention
Clock Sources
crystal/ceramic resonator oscillators and by-pass for external clock, clock security system.
Four Power Saving Modes
Halt, Active-Halt, Wait and Slow
Main Clock Controller With
Real time base, Beep and Clock-out capabilities
Two 16-bit Timers With
2 input captures, 2 output compares, external clock input, PWM and pulse generator modes
8-bit Pwm Auto-reload Timer With
2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector
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ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
CONTROL REGISTER B (MCRB)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7= Reserved, must be kept at reset value.
Bit 6= CPB*: Compare Bit for Zero-crossing detec-
tion.
0: Zero crossing detection on falling edge
1: Zero crossing detection on rising edge
Bit 5= HDM*: Hardware Demagnetization event
Mask bit
0: Hardware Demagnetization disabled
1: Hardware Demagnetization enabled
Bit 4= SDM*: Simulated Demagnetization event
Mask bit
0: Simulated Demagnetization disabled
1: Simulated Demagnetization enabled
Bit 3 = OCV: Over Current Handling in Voltage
mode
0: Over Current protection is OFF
1:Over current protection is ON
This bit acts as follows
Table 60. Over current handling
212/309
1
CLIM bit CLI bit OCV bit
7
0
0
0
1
1
1
CPB*
6
0
1
0
1
1
HDM* SDM*
5
0
1
x
x
x
4
state (MOE reset)
Current loop effect
Current loop effect
PWM is put off as
PWM is put off as
All MCOx outputs
Normal running
Normal running
OCV
are put in reset
Output effect
3
mode
mode
OS2*
2
OS1
1
1)
Interrupt
Yes
Yes
OS0
No
No
No
0
Note 1: This feature is also available when using
the three PWM outputs (PCN bit=1 in the MDTG
register), providing that the VOC1bit = 0 (MCRA
register). See
Bits 2:0 = OS2*, OS[1:0]: Operating output mode
Selection bits
Refer to the Step behaviour diagrams
Figure
sorless mode,” on page 212.
These bits are used to define the various PWM
output configurations.
Note: OS2 is the only preload bit.
Table 61. Step Behaviour/ sensorless mode
Note: For more details, see Step behaviour dia-
grams
* Preload bits, new value taken into account at the
next C event. A C event is generated at each write
to MPHST in Direct Access mode.
OS2
bit
0
1
PWM after
Channels
Channels
before D
On High
On Low
(Figure 109
110) and Table 61, “Step Behaviour/ sen-
C and
section 10.6.8.2 on page 186
OS1
bit
0
1
0
1
and
PWM after
Channels
Channels
Channels
Channels
before Z
On High
On High
On Low
On Low
Figure
D and
110).
OS0
0
1
0
1
0
1
0
1
(Figure
before next
PWM after
channels
channels
channels
channels
channels
channels
channels
channels
On high
On high
On high
On high
On low
On low
On low
On low
Z and
C
109,
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