ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 50

• Manufacturer Part Number: ST72344S4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72344S4

• Up To 16 Kbytes Program Memory: single voltage extended Flash (XFlash) with readout and write protection, in-circuit and inapplication programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• 256 Bytes Data Eeprom With Readout Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: crystal/ceramic resonator oscillators, high-accuracy internal RC oscillator or external clock
• 5 Power-saving Modes: Slow, Wait, Halt, Auto-wakeup from Halt and Active-halt
• 16-bit Timer A With: 1 input capture, 1 output compares, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

Supply, reset and clock management
7.6.3
7.6.4
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In the case of a drop in voltage below V
is issued.
If V
hardware. No interrupt is generated, and therefore software should poll the AVDF bit to
detect when the voltage has risen, and resume normal processing.
Figure 19. Using the AVD to monitor V
Low-power modes
Table 10.
Interrupts
The AVD interrupt event generates an interrupt if the corresponding AVDIE Bit is set and the
interrupt mask in the CC register is reset (RIM instruction).
Table 11.
Wait
Halt
AVD event
DD
AVD INTERRUPT
REQUEST
IF AVDIE bit = 1
rises above the V
Mode
AVDF bit
V
V
LVD RESET
Interrupt event
IT+(AVD)
IT-(AVD)
V
IT-(LVD)
Low-power mode description
Interrupt event
No effect on SI. AVD interrupts cause the device to exit from Wait mode.
The SICSR register is frozen.
V
DD
IT+(AVD)
0
Doc ID 12321 Rev 5
threshold voltage the AVDF bit is cleared automatically by
Event flag
IT-(AVD)
AVDF
1
INTERRUPT PROCESS
DD
Early warning interrupt
(Power has dropped, MCU not
not yet in reset)
, the AVDF flag is set and an interrupt request
Description
Control bit
Enable
AVDIE
0
Exit from
1
ST72344xx ST72345xx
Wait
Yes
RESET VALUE
V
hys
Exit from
Halt
No