參數資料
型號： ST72T141K2M3XXX
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO34
封裝： 0.300 INCH, PLASTIC, SO-34
文件頁數： 86/132頁
文件大?。?/td> 1494K
代理商： ST72T141K2M3XXX
ST72141K
57/132
MOTOR CONTROLLER (Cont’d)
Table 19. MTIM Timer-related Registers
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
a
software
end
of
demagnetization
(MCOMP+demagnetisation_time>FFh), the value
that stored in MDREG will be:
7Fh+(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).
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 Table
21 all the MTIM timer registers are in read-write
mode until the MTC clock is enabled (with the
MOE and DAC bits). This allows the timer, prescal-
er and compare registers 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.
Name
Reset Value
Contents
MTIM
00h
Timer Value
MZPRV
00h
Capture Zn-1
MZREG
00h
Capture Zn
MCOMP
00h
Compare Cn+1
MDREG
00h
Demagnetization Dn
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相關代理商/技術參數
參數描述
ST72T141K2M6 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72T212G2B6 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72T212G2M6 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72T213G1B6 功能描述:8位微控制器 -MCU OTP EPROM 4K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72T213G1M6 功能描述:8位微控制器 -MCU OTP EPROM 4K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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