- 您现在的位置：买卖IC网 > PDF目录98144 > ST72141K2B3/XXX (STMICROELECTRONICS) 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 PDF资料下载
参数资料
| 型号： | ST72141K2B3/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, PLASTIC, SDIP-32 |
| 文件页数： | 91/133页 |
| 文件大小： | 2615K |
| 代理商： | ST72141K2B3/XXX |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页当前第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
60/133
MOTOR CONTROLLER (Cont’d)
8.1.4.3 PWM Manager
The PWM manager controls the motor via the six
output channels in voltage mode or current mode
depending on the V0C1 bit in the MCRA register.
A block diagram of this part is given in Figure 37.
Voltage Mode
In Voltage mode (V0C1 bit = ”0”), the PWM is gen-
erated by the 16-bit A Timer.
Its duty cycle is programmed by software (refer to
the chapter on the 16-bit Timer) as required by the
application (speed regulation for example).
The current comparator is used for safety purpos-
es as a current limitation. For this feature, the de-
tected current must be present on the MCCFI pin
and the current limitation must be present on pin
OCP1A. This current limitation is fixed by a voltage
reference depending on the maximum current ac-
ceptable for the motor. This current limitation is
generated with the VDD voltage by means of an
external divider but can also be adjusted with an
external reference voltage (
≤3.7 V). The external
components are adjusted by the user depending
on the application needs. In Voltage mode, it is
mandatory to set a current limitation.
In sensorless mode the BEMF zero crossing is
done during the PWM off time.
The PWM signal is directed to the channel manag-
er that connects it to the programmed outputs
(See Figure 39).
Current Mode
In current mode, the PWM output signal is gener-
ated by a combination of the output of the meas-
urement window generator (see Figure 38) and
the output of the current comparator, and is direct-
ed to the output channel manager as well (Figure
The current reference is provided to the compara-
tor by the PWM output of the 16-bit Timer (0.25%
accuracy), filtered through a RC filter (external ca-
pacitor on pin OCP1A and an internal voltage di-
vider 30K and 70K).
The detected current input must be present on the
MCCFI pin.
To avoid spurious commutations due to parasitic
noise after switching on the PWM, a 2.5-s filter
can be applied on the comparator output by set-
ting the CFF bit in the MCRB register.
The On state 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.
Figure 37. Current Feedback
MCCFI
2.5-
μs Filter
VCREF
R1
R2
16-bit Timer - PWM
OCP1A
CEXT
Common Mode = VDD - (1,4...1,0)V
VCREF MAX = VDD - 1,3 V
Power down mode
To Phase State
V0C1 bit
CFF bit
Sampling frequency
+
-
Control
MCRA Register
MCRA
(V)
R1ext
R2ext
VDD
(V)
(I)
Register
LEGEND:
(I): Current mode
(V): Voltage mode
相关PDF资料 |
PDF描述 |
|---|---|
| ST72311N4T6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64 |
| ST72311J2B6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST72311N2T3/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64 |
| ST72321BAR7T6 | MICROCONTROLLER, QFP64 |
| ST72321BR7T3 | MICROCONTROLLER, QFP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST72141K2B6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
| ST72141K2M1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
| ST72141K2M3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
| ST72141K2M3/XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| ST72141K2M6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
发布紧急采购，3分钟左右您将得到回复。