ST7MC1K2 datasheet(72/371 Pages) STMICROELECTRONICS

부품명	ST7MC1K2

상세설명	Clock, reset and supply management

PDF	371 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

Logo

72 / 371 page

Obsolete

Product(s)

- Obsolete

Product(s)

Power saving modes

ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto

72/371

8.2

Slow mode

This mode has two targets:

●

To reduce power consumption by decreasing the internal clock in the device,

●

To adapt the internal clock frequency (fCPU) to the available supply voltage.

SLOW mode is controlled by three bits in the MCCSR register: the SMS bit enables or

disables SLOW mode and two CPx bits select the internal slow frequency (fCPU).

In this mode, the master clock frequency (fOSC2) can be divided by 2, 4, 8 or 16. The CPU

and peripherals are clocked at this lower frequency (fCPU).

Note:

Slow Wait mode is activated when entering the Wait mode while the device is already in

Slow mode.

Figure 22.

SLOW mode clock transitions

SMS

CP1:0

fCPU

New SLOW

Normal run mode

MCCSR

frequency

request

fOSC2

fOSC2/2

fOSC2/4

fOSC2

Obsolete

Product(s)

- Obsolete

Product(s)

ST7MC1K2 데이터시트(PDF) 72 Page - STMicroelectronics