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ST72325 Datasheet(PDF) 33 Page - STMicroelectronics

No. de pieza ST72325
Descripción Electrónicos  8-BIT MCU WITH 16 TO 60K FLASH/ROM, ADC, CSS, FIVE TIMERS, SPI, SCI, I2C INTERFACE
PDF  193 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72325 Datasheet(HTML) 33 Page - STMicroelectronics

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SYSTEM INTEGRITY MANAGEMENT (Cont’d)
6.4.2.2 Monitoring a Voltage on the EVD pin
This mode is selected by setting the AVDS bit in
the SICSR register.
The AVD circuitry can generate an interrupt when
the AVDIE bit of the SICSR register is set. This in-
terrupt is generated on the rising and falling edges
of the comparator output. This means it is generat-
ed when either one of these two events occur:
–VEVD rises up to VIT+(EVD)
–VEVD falls down to VIT-(EVD)
The EVD function is illustrated in Figure 19.
For more details, refer to the Electrical Character-
istics section.
Figure 19. Using the Voltage Detector to Monitor the EVD pin (AVDS bit=1)
VEVD
VIT+(EVD)
VIT-(EVD)
AVDF
0
0
1
IF AVDIE = 1
Vhyst
AVD INTERRUPT
REQUEST
INTERRUPT PROCESS
INTERRUPT PROCESS



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