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32-bit Arm Cortex-M23 Low Power MCU with Security, Safety, CAN-FD, Full Speed USB, Touch and Advanced Analog
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PIC32CM5112GC00048
PIC32CM5112GC00064
PIC32CM5112GC00100
PIC32CM5112SG00048
PIC32CM5112SG00064
PIC32CM5112SG00100
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20
Generic Clock Controller (GCLK)
20.5
Functional Description
20.5.2
GCLK Basic Operation
32-bit Arm® Cortex®-M23 MCU with Security, Functional Safety (FuSa), CAN-FD, Full-Speed USB, Enhanced Touch, and Advanced Analog
1
Guidelines for Getting Started
2
Configuration Summary
3
Ordering Information
4
Block Diagram
5
Pinout and Packaging
6
Signal Description
7
Power Supplies and Startup Considerations
8
Product Mapping
9
Peripherals
10
Processor and Architecture
11
Memories
12
PIC32CM SG00/GC00
Security Features
13
Implementation Defined Attribution Unit (IDAU)
14
System Bus AHB - APB Bridge (H2PB)
15
Multi-Channel RAM Controller (MCRAMC)
16
Peripheral Access Controller (PAC)
17
Device Service Unit (DSU)
18
Clock Distribution System
19
Oscillator Controller (OSCCTRL)
20
Generic Clock Controller (GCLK)
20.1
Overview
20.2
Features
20.3
Block Diagram
20.4
Signal Description
20.5
Functional Description
20.5.1
Principle of Operation
20.5.2
GCLK Basic Operation
20.5.2.1
Initialization
20.5.2.2
Enabling, Disabling, and Resetting
20.5.2.3
Generic Clock Generator
20.5.2.4
Enabling a Generator
20.5.2.5
Disabling a Generator
20.5.2.6
Selecting a Clock Source for the Generator
20.5.2.7
Changing the Clock Frequency
20.5.2.8
Duty Cycle
20.5.2.9
External Clock
20.5.3
Peripheral Clock
20.5.4
GCLK Additional Features
20.5.5
Sleep Mode Operation
20.5.6
Synchronization
20.6
Peripheral Dependencies
20.7
GCLK Peripheral Channel Control Mapping
20.8
Register Summary
21
Main Clock (MCLK)
22
32 KHz Oscillators Controller (OSC32KCTRL)
23
Watchdog Timer (WDT)
24
Frequency Meter (FREQM)
25
Real-Time Counter (RTC)
26
Direct Memory Access Controller (DMAC)
27
Supply Controller (SUPC)
28
Power Manager (PM)
29
Reset Controller (RSTC)
30
External Interrupt Controller (EIC)
31
Non-Volatile Memory Controller (NVMCTRL)
32
Event System (EVSYS)
33
I/O Pin Controller (PORT)
34
Serial Communication Interface (SERCOM)
35
Controller Area Network (CAN)
36
Universal Serial Bus (USB)
37
Configurable Custom Logic (CCL)
38
Analog to Digital Converter (ADC)
39
Analog Comparator (AC)
40
Timer/Counter for Control Applications (TCC)
41
TrustRAM (TRAM)
42
Peripheral Touch Controller (PTC)
43
Hardware Security Module Lite (HSM-Lite)
44
Anti-Tamper Module (AT)
45
Physically Uncloneable Function (PUF)
46
Electrical Characteristics
47
Packaging Information
48
Schematic Checklist
49
Common Conventions
50
Acronyms and Abbreviations
51
Revision History
Microchip Information
20.5.2 GCLK Basic Operation
