ST7MC2R6 STMicroelectronics, ST7MC2R6 Datasheet - Page 187

• Manufacturer Part Number: ST7MC2R6
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
• Manufacturer: STMicroelectronics

Specifications of ST7MC2R6

• 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

MOTOR CONTROLLER (Cont’d)
Table 44. Current Window filter Setting
Note: Times are indicated for 4 MHz f
The Current Window filter is activated each time
the PWM is turned ON. It blanks the output of the
current comparator during the time set by the
CFW[2:0] bits in the MCFR register. The reset val-
ue is 000b (blanking window off).
The Current feedback filter sets the number of
consecutive valid samples (when current is above
the limit) needed to generate the active CL event
used to turn OFF the PWM. The reset value is 1.
The sampling of the current comparator is done at
f
PERIPH
CFW2 CFW1 CFW0
0
0
0
0
1
1
1
1
/4.
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Blanking window length
Blanking window off
0.5 µs
1.5 µs
2.5 µs
3.5 µs
1 µs
2 µs
3 µs
PERIPH
Table 45. Current Feedback Filter Setting
The ON time of the resulting PWM starts at the
end of the measurement window (rising edge),
and ends either at the beginning of the next meas-
urement window (falling edge), or when the cur-
rent level is reached.
Note: Be careful that the current comparator is
OFF until the CKE and/or DAC bits are set in the
MCRA register.
CFF2
0
0
0
0
1
1
1
1
CFF1
0
0
1
1
0
0
1
1
CFF0
0
1
0
1
0
1
0
1
ST7MC1xx/ST7MC2xx
needed to turn OFF PWM
Nb of Feedback Samples
1
2
3
4
5
6
7
8
187/309
1