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Highly Integrated Wireless MCU with CAN FD, Ethernet, USB, Motor Control, Graphics, Touch and Enhanced Security
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PIC32CX2051BZ62132
PIC32WM-BZ6204UE
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18
Clock and Reset Unit (CRU)
18.3
Clock System
Introduction
PIC32CX-BZ6
SoC Family Features
PIC32WM-BZ6
Module Features
1
Acronyms and Abbreviations
2
Ordering Information
3
Configuration Summary
4
PIC32CX-BZ6
SoC Description
5
PIC32WM-BZ6
Module Description
6
Pinout and Signal Descriptions List
7
I/O Ports and Peripheral Pin Select (PPS)
8
Power Subsystem
9
Product Memory Mapping Overview
10
Processor and Architecture
11
Prefetch Cache (PCHE)
12
Cortex M Cache Controller (CMCC)
13
Secure Boot ROM
14
eFuse Controller
15
Security Features
16
Flash Controller (FC)
17
Device Service Unit (DSU)
18
Clock and Reset Unit (CRU)
18.1
Overview
18.2
Features
18.3
Clock System
18.3.1
Block Diagram
18.3.2
Oscillators
18.3.3
System and Peripheral Bus Clock Generation (CLKGEN)
18.3.4
FRC Divider (FRCDIV)
18.3.5
RFPLL Wrapper
18.3.6
Ethernet PLL (EPLL)
18.3.7
USB PLL
18.3.8
Reference Clock (REFO_CLK) Generation
18.3.9
Peripheral Clock Generation (GCLK)
18.3.10
LPCLK Divider
18.3.11
Start-Up Considerations
18.3.12
Fail-Safe Clock Monitor (FSCM)
18.4
Resets
18.5
Register Summary
18.6
Register Description
19
Power Management Unit (PMU)
20
Watchdog Timer (WDT)
21
Deadman Timer (DMT)
22
RAM Error Correction Code (RAMECC)
23
System Configuration and Register Locking (CFG)
24
Peripheral Module Disable (PMD)
25
Peripheral Access Controller (PAC)
26
Real-Time Counter and Calendar (RTCC)
27
Direct Memory Access Controller (DMAC)
28
External Interrupt Controller (EIC)
29
Configurable Custom Logic (CCL)
30
Frequency Meter (FREQM)
31
Event System (EVSYS)
32
Serial Communication Interface (SERCOM)
33
SERCOM Synchronous and Asynchronous Receiver and Transmitter (SERCOM USART)
34
SERCOM Serial Peripheral Interface (SERCOM SPI)
35
SERCOM Inter-Integrated Circuit (SERCOM I
2
C)
36
Quad Serial Peripheral Interface (QSPI)
37
Analog-to-Digital Converter (ADC)
38
Automated Touch Sensing using the Enhance Capacitive Voltage Divider (CVD)
39
Analog Comparators (AC)
40
Digital-to-Analog Converter (DAC)
41
Timer/Counter (TC)
42
Timer/Counter for Control Applications (TCC)
43
Controller Area Network (CAN)
44
Universal Serial Bus (USB)
45
Ethernet Media Access Controller (ETH)
46
Quadrature Encoder Interface (QEI)
47
Low-Cost Controllerless (LCC)
48
802.15.4 Bluetooth® Radio Subsystem
49
Electrical Characteristics
50
Packaging Information
51
Appendix A: Regulatory Approval
52
Appendix B: Acronyms and Abbreviations
53
Document Revision History
Microchip Information
18.3 Clock System
