参数资料
型号: ST7PL35F2UA/XXXE
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, QCC20
封装: 5 X 6 MM, ROHS COMPLIANT, QFN-20
文件页数: 96/168页
文件大小: 2955K
代理商: ST7PL35F2UA/XXXE
Obsolete
Product(s)
- Obsolete
Product(s)
ST7L34, ST7L35, ST7L38, ST7L39
33/168
SYSTEM INTEGRITY MANAGEMENT (SI) (cont’d)
7.6.2 Auxiliary Voltage Detector (AVD)
The Voltage Detector function (AVD) is based on
an analog comparison between a VIT-(AVD) and
VIT+(AVD) reference value and the VDD main sup-
ply voltage (VAVD). The VIT-(AVD) reference value
for falling voltage is lower than the VIT+(AVD) refer-
ence value for rising voltage in order to avoid par-
asitic detection (hysteresis).
The output of the AVD comparator is directly read-
able by the application software through a real
time status bit (AVDF) in the SICSR register. This
bit is read only.
Caution: The AVD functions only if the LVD is en-
abled through the option byte.
7.6.2.1 Monitoring the VDD Main Supply
The AVD voltage threshold value is relative to the
selected LVD threshold configured by option byte
If the AVD interrupt is enabled, an interrupt is gen-
erated when the voltage crosses the VIT+(LVD) or
VIT-(AVD) threshold (AVDF bit is set).
In the case of a drop in voltage, the AVD interrupt
acts as an early warning, allowing software to shut
down safely before the LVD resets the microcon-
troller. See Figure 19.
Figure 19. Using the AVD to Monitor VDD
7.6.3 Low Power Modes
7.6.3.1 Interrupts
The AVD interrupt event generates an interrupt if
the corresponding Enable Control Bit (AVDIE) is
set and the interrupt mask in the CC register is re-
set (RIM instruction).
VDD
VIT+(AVD)
VIT-(AVD)
AVDF bit
01
RESET
IF AVDIE bit = 1
Vhyst
AVD INTERRUPT
REQUEST
INTERRUPT Cleared by
VIT+(LVD)
VIT-(LVD)
LVD RESET
Early Warning Interrupt
(Power has dropped, MCU not
not yet in reset)
0
1
hardware
INTERRUPT Cleared by
reset
Mode
Description
WAIT
No effect on SI. AVD interrupts cause the
device to exit from Wait mode.
HALT
The SICSR register is frozen.
The AVD becomes inactive and the AVD in-
terrupt cannot be used to exit from Halt
mode.
Interrupt Event
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
AVD event
AVDF
AVDIE
Yes
No
1
相关PDF资料
PDF描述
ST7L35F2UA/XXXRE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
ST7L35F2UC/XXXRE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
ST7L39F2MC/XXXE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
ST7L39F2UC/XXXRE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
ST7PL34F2MC/XXXE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
相关代理商/技术参数
参数描述
ST7PLITE02F0U6TR 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
ST7PLITE02Y0B6 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
ST7PLITE02Y0B6TR 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI
ST7PLITE02Y0M6 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI
ST7PLITE02Y0M6TR 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI