ST72321AR6-Auto STMicroelectronics, ST72321AR6-Auto Datasheet - Page 63
ST72321AR6-Auto
Manufacturer Part Number
ST72321AR6-Auto
Description
8-bit MCU for automotive with 32 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
Manufacturer
STMicroelectronics
Datasheet
1.ST72321R9-AUTO.pdf
(243 pages)
Specifications of ST72321AR6-Auto
Hdflash Endurance
100 cycles, data retention 20 years
Clock Sources
crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
4 Power Saving Modes
Halt, Active Halt, Wait and Slow
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ST72321xx-Auto
8.3
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 the following
CP1:0
SMS
f
CPU
f
Figure
OSC2
24.
Doc ID 13829 Rev 1
00
f
FREQUENCY
OSC2/2
NEW SLOW
REQUEST
01
NORMAL RUN MODE
f
OSC2/4
REQUEST
Power saving modes
f
OSC2
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