ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 48

• Manufacturer Part Number: ST72521R9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72521R9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

Supply, reset and clock management
Figure 15. Using the AVD to monitor V
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AVDF bit
AVD INTERRUPT
REQUEST
IF AVDIE bit = 1
LVD RESET
V
V
V
V
IT+(AVD)
IT+(LVD)
IT-(AVD)
IT-(LVD)
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 interrupt is generated on the rising and falling edges of the comparator output. This
means it is generated when either one of these two events occur:
●
●
The EVD function is illustrated in
For more details, refer to
V
DD
V
V
EVD
EVD
0
rises up to V
falls down to V
1
IT+(EVD)
INTERRUPT PROCESS
IT-(EVD)
Section 20: Electrical
V
Early Warning Interrupt
(Power has dropped, MCU not
not yet in reset)
hyst
DD
Doc ID 17660 Rev 1
(AVDS bit = 0)
RESET VALUE
Figure
16.
characteristics.
t
1
rv VOLTAGE RISE TIME
INTERRUPT PROCESS
ST72521xx-Auto
0