ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 55

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: halt, active halt, wait and slow
• Main Clock Controller With: real time base, beep and clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

ST7232Axx-Auto
8.3
Wait mode
Figure 20. Slow mode clock transitions
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 remains
in wait mode until a reset or an interrupt occurs, causes it to wake up.
Refer to
Figure
21.
CP1:0
f
OSC2
SMS
f
CPU
frequency request
f
00
OSC2
New slow
/2
01
f
OSC2
/4
Normal run mode request
f
OSC2
Power saving modes
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