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32-bit Arm Cortex-M0+ with 5V Support MCU
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14
Generic Clock Controller (GCLK)
14.6
Functional Description
14.6.2
Basic Operation
512-KB Flash, 64-KB SRAM with CAN-FD, Enhanced PTC and Advanced Analog
1
Configuration Summary
2
Ordering Information
3
Block Diagram
4
Pinout and Packaging
5
Signal Descriptions List
6
Power Supplies
7
Device Start-Up
8
Product Mapping
9
Peripherals
10
Memories
11
Processor and Architecture
12
Peripheral Access Controller (PAC)
13
Device Service Unit (DSU)
14
Generic Clock Controller (GCLK)
14.1
Overview
14.2
Features
14.3
Block Diagram
14.4
Signal Description
14.5
Peripheral Dependencies
14.6
Functional Description
14.6.1
Principle of Operation
14.6.2
Basic Operation
14.6.2.1
Initialization
14.6.2.2
Enabling, Disabling, and Resetting
14.6.2.3
Generic Clock Generator
14.6.2.4
Enabling a Generator
14.6.2.5
Disabling a Generator
14.6.2.6
Selecting a Clock Source for the Generator
14.6.2.7
Changing the Clock Frequency
14.6.2.8
Duty Cycle
14.6.2.9
External Clock
14.6.2.10
Peripheral Clock
14.6.3
Additional Features
14.6.4
Sleep Mode Operation
14.6.5
Debug Operation
14.6.6
Synchronization
14.7
Register Summary
15
Main Clock (MCLK)
16
32.768 kHz Oscillators Controller (OSC32KCTRL)
17
Oscillators Controller (OSCCTRL)
18
Supply Controller (SUPC)
19
Power Manager (PM)
20
Reset Controller (RSTC)
21
Divide and Square Root Accelerator (DIVAS)
22
Watchdog Timer (WDT)
23
Real-Time Counter (RTC)
24
Direct Memory Access Controller (DMAC)
25
External Interrupt Controller (EIC)
26
Non-volatile Memory Controller (NVMCTRL)
27
I/O Pin Controller (PORT)
28
Event System (EVSYS)
29
Serial Communication Interface (SERCOM)
30
SERCOM Synchronous and Asynchronous Receiver and Transmitter (SERCOM USART)
31
SERCOM Serial Peripheral Interface (SERCOM SPI)
32
SERCOM Inter-Integrated Circuit (SERCOM I
2
C)
33
Control Area Network (CAN)
34
Timer/Counter (TC)
35
Timer Counter for Control Applications (TCC)
36
Configurable Custom Logic (CCL)
37
Analog-to-Digital Converter (ADC)
38
Analog Comparators (AC)
39
Digital-to-Analog Converter (DAC)
40
Peripheral Touch Controller (PTC)
41
Frequency Meter (FREQM)
42
Position Decoder (PDEC)
43
Integrity Check Monitor (ICM)
44
SRAM Memory Built-In Self-Test Module (SMBIST)
45
SRAM Controller (MCRAMC)
46
Electrical Characteristics at 85°C
47
Electrical Characteristics at 125°C
48
Packaging Information
49
Schematic Checklist
50
Appendix
51
Revision History
The Microchip Website
Product Change Notification Service
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Product Identification System
Microchip Devices Code Protection Feature
Legal Notice
Trademarks
Quality Management System
Worldwide Sales and Service
14.6.2 Basic Operation
