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參數(shù)資料
| 型號： | ST7FLU05MAE |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 53/124頁 |
| 文件大?。?/td> | 2186K |
| 代理商： | ST7FLU05MAE |
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Supply, reset and clock management
ST7LUS5, ST7LU05, ST7LU09
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6.3.2
Asynchronous external RESET pin
The RESET pin is both an input and an open-drain output with integrated RON weak pull-up
resistor. This pull-up has no fixed value but varies in accordance with the input voltage. It
can be pulled low by external circuitry to reset the device. See Chapter 12: Electrical
characteristics for more details.
A reset signal originating from an external source must have a duration of at least th(RSTL)in
in order to be recognized (see Figure 17). This detection is asynchronous and therefore the
MCU can enter reset state even in halt mode.
The RESET pin is an asynchronous signal which plays a major role in EMS performance. In
a noisy environment, it is recommended to follow the guidelines mentioned in Chapter 12:
Electrical characteristics.
6.3.3
External power-on reset
If the LVD is disabled by the option byte, to start up the microcontroller correctly, the user
must ensure by means of an external reset circuit that the reset signal is held low until VDD
is over the minimum level specified for the selected fCLKIN frequency.
A proper reset signal for a slow rising VDD supply can generally be provided by an external
RC network connected to the RESET pin.
6.3.4
Internal low voltage detector (LVD) reset
Two different reset sequences caused by the internal LVD circuitry can be distinguished:
●
Power-on reset
●
Voltage drop reset
The device RESET pin acts as an output that is pulled low when VDD <VIT+ (rising edge) or
VDD <VIT- (falling edge) as shown in Figure 17.
The LVD filters spikes on VDD larger than tg(VDD) to avoid parasitic resets.
6.3.5
Internal watchdog reset
The reset sequence generated by an internal watchdog counter overflow is shown in
Figure 17.
Starting from the watchdog counter underflow, the device RESET pin acts as an output that
is pulled low during at least tw(RSTL)out.
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| ST7FMC1K2B6 | 功能描述:8位微控制器 -MCU 8 BITS MICROCONTR RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT |
| ST7FMC1K2T3 | 功能描述:8位微控制器 -MCU ST7MC1/ST7MC2 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT |
| ST7FMC1K2T6 | 功能描述:8位微控制器 -MCU 8K Flash 384 RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT |
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