st72324bk STMicroelectronics, st72324bk Datasheet - Page 62

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

On-chip peripherals
9.2.5
9.2.6
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Figure 29. Main clock controller (MCC/RTC) block diagram
Low-power modes
Table 31.
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 32.
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
f
OSC2
Mode
MCCBCR
Interrupt event
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.
Low-power modes
MCC/RTC interrupt control/wake-up capability
MCCSR
DIV 2, 4, 8, 16
MCO
CP1 CP0
DIV 64
SMS
1
0
12-bit MCC RTC
TB1
Beep signal
Event flag
selection
BC1 BC0
counter
OIF
TB0
OIE
Description
OIF
Control bit
Enable
OIE
MCC/RTC interrupt
f
CPU
watchdog
timer
To
Exit from
Wait
Yes
ST72323 ST72323L
Exit from
Beep
MCO
to CPU and
peripherals
CPU clock
No
Halt
(1)