ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 64

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

Power saving modes
Note:
7.3
64/324
In this mode, the master clock frequency (f
and peripherals are clocked at this lower frequency (f
SLOW-WAIT mode is activated by entering WAIT mode while the device is in SLOW mode.
Figure 23. SLOW mode clock transitions
Wait mode
WAIT mode places the MCU in a low power consumption mode by stopping the CPU.
This power saving mode is selected by calling the ‘WFI’ instruction.
All peripherals remain active. During WAIT mode, the I[1:0] bits of the CC register are forced
to ‘10’, to enable all interrupts. All other registers and memory remain unchanged. The MCU
remains in WAIT mode until an interrupt or RESET occurs, whereupon the Program Counter
branches to the starting address of the interrupt or Reset service routine.
The MCU will remain in WAIT mode until a Reset or an Interrupt occurs, causing it to wake
up.
Refer to
Figure 24
Doc ID 12370 Rev 8
CP1:0
f
SMS
CPU
f
OSC2
f
FREQUENCY
OSC2
00
NEW SLOW
REQUEST
/2
OSC2
01
) can be divided by 2, 4, 8 or 16. The CPU
f
OSC2
NORMAL RUN MODE
/4
CPU
REQUEST
).
f
OSC2
ST72561-Auto