收藏本站
参数资料
型号： ST72P63BE6M1
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, PDSO24
封装： 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-24
文件页数： 63/145页
文件大小： 2984K
代理商： ST72P63BE6M1
ST7263BDx ST7263BHx ST7263BKx ST7263BE
24/145
7 Reset and clock management
7.1 Reset
The Reset procedure is used to provide an orderly
software start-up or to exit low power modes.
Three reset modes are provided: a low voltage
(LVD) reset, a watchdog reset and an external re-
set at the RESET pin.
A reset causes the reset vector to be fetched from
addresses FFFEh and FFFFh in order to be loaded
into the PC and with program execution starting
from this point.
An internal circuitry provides a 4096 CPU clock cy-
cle delay from the time that the oscillator becomes
active.
7.1.1 Low voltage detector (LVD)
Low voltage reset circuitry generates a reset when
VDD is:
■
below VIT+ when VDD is rising,
■
below VIT- when VDD is falling.
During low voltage reset, the RESET pin is held low,
thus permitting the MCU to reset other devices.
It is recommended to make sure that the VDD sup-
ply voltage rises monotonously when the device is
exiting from Reset, to ensure the application func-
tions properly.
7.1.2 Watchdog reset
When a watchdog reset occurs, the RESET pin is
pulled low permitting the MCU to reset other devic-
es in the same way as the low voltage reset (Fig-
ure 12).
7.1.3 External reset
The external reset is an active low input signal ap-
plied to the RESET pin of the MCU.
As shown in Figure 15, the RESET signal must
stay low for a minimum of one and a half CPU
clock cycles.
An internal Schmitt trigger at the RESET pin is pro-
vided to improve noise immunity.
Figure 12. Low voltage detector functional diagram
Figure 13. Low voltage reset signal output
Note: Hysteresis (VIT+-VIT-) = Vhys
Figure 14. Temporization timing diagram after an internal Reset
LOW VOLTAGE
VDD
FROM
WATCHDOG
RESET
INTERNAL
DETECTOR
RESET
VDD
VIT+
VIT-
VDD
Addresses
$FFFE
Temporization (4096 CPU clock cycles)
VIT+
相关PDF资料
PDF描述
SC104002MPV 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP112
SC104026VFV 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
SAF-XE167GM-72FXXL RISC MICROCONTROLLER, PQFP144
SAK-XE167HM-72FXXL RISC MICROCONTROLLER, PQFP144
STM32F102C8T6TR 32-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP48
相关代理商/技术参数
参数描述
ST72T101G1B6 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72T101G1M6 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72T101G2B6 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72T101G2M6 功能描述:8位微控制器 -MCU RO 511-ST72C104G2M6 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72T121J2B6 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*