ST7FMC2M9T6 STMicroelectronics, ST7FMC2M9T6 Datasheet - Page 174

• Manufacturer Part Number: ST7FMC2M9T6
• Description: MCU 8BIT 60K FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FMC2M9T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: LINSCI, SPI
• Peripherals: LVD, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 60
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Processor Series: ST7FMC2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 1536 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 5
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7MC-KIT/BLDC, ST7MDT50-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• 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: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-4867

ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
Note on using the auto-updated MTIM timer:
The auto-updated MTIM timer works accurately
within its operating range but some care has to be
taken when processing timer-dependent data such
as the step duration for regulation or demagnetiza-
tion.
For example if an overflow occurs when calculat-
ing
(MCOMP+demagnetisation_time>FFh), the value
that is stored in MDREG will be:
80h+(MCOMP+demagnetization_time-FFh)/2.
Note on commutation interrupts: It is good prac-
tice to modify the configuration for the next step as
soon as possible, i.e within the commutation inter-
rupt routine.
All registers that need to be changed at each step
have a preload register that enables the modifica-
tions for a complete new configuration to be per-
formed at the same time (at C event in normal
mode or when writing the MPHST register in direct
access mode).
174/309
1
a
simulated
end
of
demagnetization
These configuration bits are:
CPB, HDM, SDM and OS2 in the MCRB register
and IS[1:0], OO[5:0] in the MPHST register.
Note on initializing the MTC: As shown in
all the MTIM timer registers are in read-write mode
until the MTC clock is enabled (with the CKE bit).
This allows the timer, prescaler and compare reg-
isters to be properly initialized for start-up.
In sensorless mode, the motor has to be started in
switched mode until a BEMF voltage is present on
the inputs. This means the prescaler ST[3:0] bits
and MCOMP register have to be modified by soft-
ware. When running the ST[3:0] bits can only be
incremented / decremented, so the initial value is
very important.
When starting directly in autoswitched mode (in
sensor mode for example), write an appropriate
value in the MZREG and MZPRV register to per-
form a step calculation as soon as the clock is en-
abled.
Table 41