M263 datasheet(292/398 Pages) NUVOTON

Part #	M263

Description	Arm짰 Cortex짰-M 32-bit Microcontroller

PDF	398 Pages

Scroll/Zoom	100%

Manufacturer	NUVOTON [Nuvoton Technology Corporation]

Direct Link	http://www.nuvoton.com

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292 / 398 page

M261/M262/M263

Mar 25, 2020

Page 292 of 398

Rev 1.02

6.3

Clock Controller

6.3.1

Overview

The clock controller generates clocks for the whole chip, including system clocks and all peripheral

clocks. The clock controller also implements the power control function with the individually clock

ON/OFF control, clock source selection and a clock divider. The chip will not enter Power-down mode

until CPU sets the Power-down enable bit PDEN (CLK_PWRCTL[7]) and core executes the WFI

instruction. After that, chip enters Power-down mode and wait for wake-up interrupt source triggered to

leave Power-down mode. In Power-down mode, the clock controller turns off the 4~24 MHz external

high speed crystal (HXT), 48 MHz internal high speed RC oscillator (HIRC48) and 12 MHz internal

high speed RC oscillator (HIRC) to reduce the overall system power consumption. Figure 6.3-1 to

Figure 6.3-3 show the clock generator and the overview of the clock source control.

M263 Datasheet(PDF) 292 Page - Nuvoton Technology Corporation