ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 89

• 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

ST72344xx ST72345xx
11.2.5
11.2.6
Figure 41. Main clock controller (MCC/RTC) block diagram
Low-power modes
Table 39.
Interrupts
The MCC/RTC interrupt event generates an interrupt if the OIE bit of the MCCSR register is
set and the interrupt mask in the CC register is not active (RIM instruction).
Table 40.
1. The MCC/RTC interrupt wakes up the MCU from Active-halt mode, not from Halt mode.
Wait
Active-halt
Halt
Time base overflow event
Mode
f
OSC2
Interrupt event
MCCBCR
Mode description
No effect on MCC/RTC peripheral.
MCC/RTC interrupt cause the device to exit from Wait mode.
No effect on MCC/RTC counter (OIE bit is set), the registers are frozen.
MCC/RTC interrupt cause the device to exit from Active-halt mode.
MCC/RTC counter and registers are frozen.
MCC/RTC operation resumes when the MCU is woken up by an interrupt with “exit
from Halt” capability.
Interrupt event
MCCSR
DIV 2, 4, 8, 16
MCO
CP1 CP0
DIV 64
Doc ID 12321 Rev 5
SMS
1
0
12-BIT MCC RTC
BEEP SIGNAL
TB1 TB0 OIE
SELECTION
Event flag
COUNTER
BC1 BC0
OIF
Description
OIF
Control bit
Enable
OIE
MCC/RTC INTERRUPT
f
CPU
WATCHDOG
TIMER
TO
Exit from
Wait
Yes
On-chip peripherals
PERIPHERALS
TO CPU AND
CPU CLOCK
Exit from
BEEP
MCO
No
Halt
(1)
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