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ST72344S2 датащи(PDF) 89 Page - STMicroelectronics

номер детали ST72344S2
подробное описание детали  SCI asynchronous serial interface
PDF  247 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
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ST72344S2 датащи(HTML) 89 Page - STMicroelectronics

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ST72344xx, ST2345xx
On-chip peripherals
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Figure 41.
Main clock controller (MCC/RTC) block diagram
11.2.5
Low-power modes
11.2.6
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).
DIV 2, 4, 8, 16
MCC/RTC INTERRUPT
SMS
CP1 CP0
TB1
TB0
OIE
OIF
CPU CLOCK
MCCSR
12-BIT MCC RTC
COUNTER
TO CPU AND
PERIPHERALS
fOSC2
fCPU
MCO
MCO
BC1 BC0
MCCBCR
BEEP
SELECTION
BEEP SIGNAL
1
0
TO
WATCHDOG
TIMER
DIV 64
Table 39.
Mode description
Mode
Description
Wait
No effect on MCC/RTC peripheral.
MCC/RTC interrupt cause the device to exit from Wait mode.
Active-halt
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.
Halt
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.
Table 40.
Interrupt event
Interrupt event
Event flag
Enable
Control bit
Exit from
Wait
Exit from
Halt
Time base overflow event
OIF
OIE
Yes
No (1)
1.
The MCC/RTC interrupt wakes up the MCU from Active-halt mode, not from Halt mode.



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