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参数资料
型号： ST72F321J9T5
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
封装： 10 X 10 MM, PLASTIC, TQFP-44
文件页数： 91/176页
文件大小： 1112K
代理商： ST72F321J9T5
ST72321J
21/176
6 SUPPLY, RESET AND CLOCK MANAGEMENT
The device includes a range of utility features for
securing the application in critical situations (for
example in case of a power brown-out), and re-
ducing the number of external components. An
overview is shown in Figure 9.
For more details, refer to dedicated parametric
section.
Main features
s
Optional PLL for multiplying the frequency by 2
(enabled by option byte)
s
Reset Sequence Manager (RSM)
s
Multi-Oscillator Clock Management (MO)
– 5 Crystal/Ceramic resonator oscillators
– 1 External RC oscillator
– 1 Internal RC oscillator
s
System Integrity Management (SI)
– Main supply Low voltage detection (LVD)
– Auxiliary Voltage detector (AVD) with interrupt
capability for monitoring the main supplyClock
Security System (CSS) with Clock Filter and
Backup Safe Oscillator (enabled by option
byte)
6.1 PHASE LOCKED LOOP
If the clock frequency input to the PLL is in the
range 2 to 4 MHz, the PLL can be used to multiply
the frequency by two to obtain an fOSC2 of 4 to 8
MHz. The PLL is enabled by option byte. If the PLL
is disabled, then fOSC2 = fOSC/2.
Figure 8. PLL Block Diagram
Figure 9. Clock, Reset and Supply Block Diagram
0
1
PLL OPTION BIT
PLL x 2
fOSC2
/2
fOSC
LOW VOLTAGE
DETECTOR
(LVD)
fOSC2
AUXILIARY VOLTAGE
DETECTOR
(AVD)
MULTI-
OSCILLATOR
(MO)
OSC1
RESET
VSS
VDD
RESET SEQUEN CE
MANAGER
(RSM)
CLOCK
FILTER
SAFE
OSC
CLOCK SECURITY SYSTEM
(CSS)
OSC2
MAIN CLOCK
CSS Interrupt Request
AVD Interrupt Request
CONTROLLER
PLL
SYSTEM INTE GRITY MANAGEMENT
WATCHDOG
SICSR
TIMER (WDG)
WITH REALTIME
CLOCK (MCC/RTC )
AVD AVD LVD
RF
CSS
IE
CSS
D
WDG
RF
fOSC
fOSC2
(option)
0
F
fCPU
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相关代理商/技术参数
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ST72F321J9T6 功能描述:8位微控制器 -MCU Flash 60K SPI/SCI/I2 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
ST72F321J9TA 功能描述:8位微控制器 -MCU AUTO 8BIT MICRO 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
ST72F321J9TAE 功能描述:8位微控制器 -MCU 8B MCU 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
ST72F321J9TAS 制造商:STMicroelectronics 功能描述:
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