ST7FMC2S6TC STMicroelectronics, ST7FMC2S6TC Datasheet - Page 180
ST7FMC2S6TC
Manufacturer Part Number
ST7FMC2S6TC
Description
IC MCU 8BIT 32K FLASH 44-LQFP
Manufacturer
STMicroelectronics
Series
ST7r
Datasheet
1.ST7FMC2S4T6.pdf
(309 pages)
Specifications of ST7FMC2S6TC
Core Processor
ST7
Core Size
8-Bit
Speed
8MHz
Connectivity
LINSCI, SPI
Peripherals
LVD, Motor Control PWM, POR, PWM, WDT
Number Of I /o
26
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3.8 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
44-LQFP
For Use With
497-8402 - BOARD EVAL COMPLETE INVERTER497-8400 - KIT IGBT PWR MODULE CTRL ST7MC497-6408 - BOARD EVAL BLDC SENSORLESS MOTOR497-4734 - EVAL KIT 3KW POWER DRIVER BOARD497-4733 - EVAL KIT 1KW POWER DRIVER BOARD497-4732 - EVAL KIT 300W POWER DRIVER BOARD497-4731 - EVAL KIT PWR DRIVER CONTROL BRD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST7FMC2S6TC
Manufacturer:
STMicroelectronics
Quantity:
10 000
Company:
Part Number:
ST7FMC2S6TCE
Manufacturer:
STMicroelectronics
Quantity:
10 000
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- Download datasheet (6Mb)
ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
10.6.7.5 Speed Measurement Mode
Motor speed can be measured using two methods
depending on sensor type: period measurement or
pulse counting. Typical sensor handling is de-
scribed here.
Incremental encoders allows accurate speed
measurement by providing a large number of puls-
es per revolution (ppr) with ppr rates up to several
thousands; the higher the ppr rate, the higher the
resolution. The proposed method consists of
Figure 99. Tachogenerator period acquisition using MTIM timer
Figure 100. Encoder Clock frequency measure using MTIM timer
180/309
1
(triggered by software
C
C
or Real-time Clock)
MTIM Counter
Comparator
Capture
MTIM Counter
Interrupts
Compare
Capture
Output
Tacho
Value
Value
Interrupts
Encoder
Value
Clock
To interrupt generator
To interrupt generator
(Capture Event)
(Capture Event)
C
C
C
C
C
S
C
To interrupt generator
(Speed Error Event)
Decreasing Speed
C
Decreasing Speed
C
counting the number of clock cycles issued by the
Incremental Encoder Interface (Encoder Clock)
during a fixed time window (refer to
The tachogenerator has a much lower ppr rate
than the encoder (typically factor 10). In this con-
text, it is more meaningful to measure the period
between Tacho Captures (i.e. relevant transitions
of the incoming signals). Accuracy is imposed by
the reference clock, i.e. the CPU clock (refer to
Figure
C
99).
C
C
C
S
Figure
C
100).
C
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