ST7MC2S6 STMicroelectronics, ST7MC2S6 Datasheet - Page 274
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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 CONTROL CHARACTERISTICS (Cont’d)
12.12.2 Input Stage (comparator + sampling)
Note:
1. The comparator accuracy is dependent of the environment. The offset value is given for a comparison done with all
digital I/Os stable. Negative injection current on the I/Os close to the inputs may reduce the accuracy. In particular care
must be taken to avoid switching on I/Os close to the inputs when the comparator is in use. This phenomenon is even
more critical when a big external serial resistor is added on the inputs.
2. This filter is implemented to wait for comparator stabilization and avoid any wrong information during start-up.
3. This delay represents the number of clock cycles needed to generate an event as soon as the comparator output
or MCO outputs change.
Example: In tachogenerator mode, this means that capture is performed on the 4th clock cycle after comparator commu-
tation., i.e. there is a variation of (1/f
274/309
Symbol
t
sampling
t
t
V
I
propag
startup
offset
V
offset
IN
Comparator input volt-
age range
Comparator offset error
Input offset current
Comparator propagation
delay
Start-up filter duration
Digital sampling delay
Parameter
2)
3)
mtc
Time waited before sampling when com-
parator is turned ON, i.e. CKE=1 or
DAC=1 (with f
Time needed to generate a capture in
tachogenerator mode as soon as the MCI
input toggles
Time needed to capture MTIM in MZREG
(BEMF) when sampling during PWM sig-
nal OFF time as soon as MCO becomes
ON
Time needed to set/reset the HST bit
when sampling during PWM signal OFF
time as soon as MCO becomes ON
(BEMF)
Time needed to generate Z event (MTIM
captured in MZREG) as soon as the com-
parator toggles (when sampling at f
Time needed to generate D event (MTIM
captured in MDREG) as soon as the com-
parator toggles
Time needed to set/reset the HST bit
when sampling during PWM signal ON
time after a delay (DS>0) as soon as
MCO becomes ON
Time needed to generate Z event (MTIM
in MZREG) when sampling during PWM
signal ON time after a delay (DS>0) as
soon as MCO becomes ON
Time needed to generate Z event (MTIM
captured in MZREG) when sampling dur-
ing PWM signal ON time at f
delay (DS>0)
) or (1 / f
SCF
) depending on the case.
PERIPH
Conditions
= 4MHz)
SCF
after a
SCF
)
V
SSA
1 / f
1 / f
Min
Delay programmed in DS bits
Delay programmed in DS bits
Delay programmed in DS bits
- 0.1
SCF
SCF
3 / f
1 / f
(MCONF) +1 / f
+ 1 / f
+ 3 / f
+ 3 / f
(see
(see
(see
mtc
mtc
Typ
(MCONF)
(MCONF)
(see
(see
+ 3 / f
3
35
Figure
SCF
4 / f
5
mtc
mtc
Figure
Figure
Figure
(see
(see
mtc
Figure
+ 3 / f
mtc
V
152)
152)
152)
DD
Max
40
Figure
Figure
100
mtc
mtc
+ 0.1
1
150)
150)
1)
151)
151)
Unit
mV
μA
ns
μs
V
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