51 Revision History

Revision F - July 2023

No content changes compared with previous revision.

Revision E - February 2023

The following table represents the changes implemented in this revision.


Section	Changes
Introduction	Updated specifications for Analog, Memories, System, Security, and the PWM
Configuration Summary	Updated with new tables for table 1-1 and 1-2
Ordering Information	Updated with a new diagram
Block Diagram	Updated with a new diagram
Pinout and Packaging	Updated 32-Pin TQFP and VQFN with the addition of a VQFN package Added an updated part number to 48-pin VQFN and 48-pin TQFP
Signal Description	Updated the note for Table 5-1
Device Start-Up	Updated the Caution note in Initial Instructions Fetching to delineate applicable device variants
Product Mapping	Updated with a new diagram and a new note
Peripherals	Updated Peripheral Dependencies with a new note
Memories	Updated the Memory Map table in Embedded Memories with new 128 KB information
Processor and Architecture	Added a new note to Table 11-3 in Interrupt Line Mapping
PAC	Added a new note to the PERID bit field of the WRCTRL register
DSU	Updated the Table in the DEVSEL bit field, and added a new die number to the DIE bi tfield of the DID register
GCLK	Added a new note to the PCHCTRLm Mapping table in the PCHCTRLm register
DMAC	Added a note to the Peripheral Trigger Source table in the CHCTRLB register
NVMCTRL	Added new 128 KB data to the Region Size table in Region Lock Bits Updated the table in NVM User Configuration with new Boot Loader Sizes
EVSYS	Added a new note to the Event Generators table in the CHANNELn register Added a new note to the User Multiplexer Number table in the USERm register
SERCOM	Added a new note to the Peripheral Dependencies table
CAN	Added a new note to the Peripheral Dependencies table
ADC	Added new information to the last paragraph of the Overview Specified “Up to two” ADCs in Features Added a new note to the Peripheral Dependencies table
AC	Clarified numbers of pins and comparators, and added hyperlinks to Overview Specified “Up to four” Comparators in Features
Packaging Information	Added a new 32-pin VQFN Package

Revision D - December 2022

The following table represents the changes implemented in this revision.


Section	Changes
Introduction	Added Qualification specifications
NVMCTRL	Restructured Security Bit and Chip Erase Hard Lock Bit with new subtopics for clarity Clarified verbiage in the SERR bit of the INTFLAG Register
SERCOM SPI	Added new verbiage to Hardware Controlled SS to clarify activity of the SS Added a new note to the MSSEN bit in the CTRLB register
Electrical Characteristics at 85°C	Updated temperature specifications in Absolute Maximum Ratings Updated notes to table 46-1 in Operating Frequencies and Thermal Limitations Updated notes to the table in Peripheral Active Current Updated notes to the table in DAC Electrical Specifications Updated notes to the table in ADC Electrical Specifications Updated the image for Figure 46-7 SPIx Host Module CPHA=0 Timing Diagrams
Electrical Characteristics at 125°C	Removed redundant information for Absolute Maximum Ratings Updated notes for table 47-1 and removed redundant information in Table 47-2 in Operating Frequencies and Thermal Limitations Updated the image for Figure 47-5 SPIx Host Module CPHA=0 Timing Diagrams The following sections had redundant information removed form the tables and/or had updates to their notes: Power Supply Peripheral Active Current I/O Pin Electrical Specifications Internal Voltage Reference Specifications Internal 32.768 kHz RC Oscillator (OSC32K) Electrical Specifications Internal 48 MHz RC Oscillator (OSC48M) Electrical Specifications Ultra-Low Power Internal 32 kHz RC Oscillator (OSCULP32K) Electrical Specifications Fractional Digital Phase Locked Loop (FDPLL96M) Electrical Specifications DAC Electrical Specifications ADC Electrical Specifications Analog Comparator (AC) Electrical Specifications SERCOM SPIx Mode Electrical Specifications Flash NVM Electrical Specifications
Schematic Checklist	Added new text for reference to the Introduction, along with a new Caution Note Replaced figures and notes in External Reset Circuit Added a new note to Debugging and Programming Pins

Revision C - July 2022

The following table represents the changes implemented in this revision.


Section	Changes
General	Added Appendix A for the MPLAB Harmony v3 Factory Bootloader
Block Diagram	Updated the Block Diagram with a new image
Pinout and Packaging	Updated part numbers for the following packages: 32-pin TQFP 48-pin VQFN and 48-pin TQFP 64-pin VQFN and 64-pin TQFP 100-pin TQFP
Power Supplies	Added text to the bullet for low-Power mode
PAC	Updated naming for the control key for the KEY bitfield in the WRCTRL Register
OSCCTRL	Added a new note to Clock Failure Detection Operation Updated the figure in Fractional Digital Phase-Locked Loop Operation to correctly place a line Update the XOSCFAIL Bitfield in the STATUS Register with a new note Updated the values in the table for the DIV bitfield in the OSC48MDIV Register
RTC	Updated the CLOCK Register in Clock/Calendar Mode with new properties and notes
TC	Updated the COUNT Register in 8-bit Mode with a new property and notes Updated the CCx Register in 8-bit Mode with a new property Updated the COUNT Register in 16-bit Mode with a new property and notes Updated the COUNT Register in 32-bit Mode with a new property and notes
TCC	Updated Counter Operation with a new note Updated DMA Operation with a new note Added a new note to the DIR bitfield in the CTRLBSET Register Updated the COUNT Register with a new property and note Updated the notes in the following registers: PATTBUF PERBUF CCBUFx
DAC	Added new text for starting a conversion to Principle of Operation
AC	Updated Peripheral Dependencies with new text after the table Updated the INTREF value in the table for the MUXNEG bitfield in the COMPCTRLn register
ICM	Updated the table for the URAT bitfield in the UASR Register
Electrical Characteristics at 85°C	Updated the Typical and Maximum values in MCU Standby Powerand updated the graph Updated the OSC48M_1 parameter with new values in OSC48M Specifications Updated naming conventions in FDPLL96M Specifications Updated the characteristics for the PTC_1a Parameter in PTC Specifications Added new values for Maximum, Typical, and conditions to the tables in SERCOM SPIx Mode Electrical Specifications
Electrical Characteristics at 125°C	Updated the Typical and Maximum values in MCU Standby Power and updated the graph Updated the OSC48M_1 parameter with new values in OSC48M Specifications Updated naming conventions in FDPLL96M Specifications Added new values for Maximum, Typical, and conditions to the tables in SERCOM SPIx Mode Electrical Specifications

Revision B - February 2022

Numerous typographical corrections were implemented in this revision across the entire document.

The following table represents the changes implemented in this revision.


Section	Changes
Introduction	Updated the Memories listing to remove references to 4, 16, and 128 KB
Ordering Information	Updated Memory size to remove 1216
Block Diagram	Updated the Flash, Data Flash and SRAM blocks to remove the references to 4, 16, and 128 KB
Memories	Updated the Table 10-1 with the removal of the column for PIC32CM1216
GCLK	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional description section Added new text to the Initialization topic Moved Sleep Mode Operation and Additional features
MCLK	Updated the Block Diagram to include CLK_MCLK_API Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional description section Added new text to the Principle of Operation topic
OSCCTRL	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Renamed Power Management to Sleep Mode Operation and moved it under the Functional Description Added new text to the Principle of Operation topic
OSC32KCTRL	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Renamed Power Management to Sleep Mode Operation and moved it under the Functional Description Added new text to the Principle of Operation topic Added a reference to the second bulleted item in 32.768 kHz External Crystal Oscillator (XOSC32K) Operation
PM	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Added new text to the Initialization topic
SUPC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Reversed the topic order for Enabling, Disabling, and Resetting to make it appear after Initialization
RSTC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Added new text to the Initialization topic
PAC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Added new text to the Initialization topic
DSU	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Renamed Power Management to Sleep Mode Controller and moved it under the Functional Description section Added new text to the Initialization topic Updated the table for the DEVSEL bit in the DID register
DIVAS	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies and Moved Register access Protection, and CPU Local Bus to the Functional Description Renamed Power Management to Sleep Mode Controller and moved it under the Functional Description section Added new text to the Initialization topic Added a note to the following registers: CTRLA DIVIDEND DIVISOR SQRNUM
WDT	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Renamed Power Management to Sleep Mode Controller and moved it under the Functional Description section Moved Clocks and Debug Operation under the Functional description section
RTC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional description section
DMAC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional description section Added new text to the beginning of the Initialization topic
EIC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation and Clocks under the Functional description section Added new descriptions in parenthesis to Principle of Operation Updated the text of Sleep Mode Operation Added bit names to Synchronization
NVMCTRL	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation and Clocks under the Functional description section Renamed Power Management to Sleep Mode Controller and moved it under the Functional Description Added new text to the beginning of the Initialization topic
PORT	Added new paragraphs to Signal Description Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Renamed Power Management to Sleep Mode Controller and moved it under the Functional Description Moved Debug Operation under the Functional description section
EVSYS	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional description section Renamed Power Management to Sleep Mode Controller and moved it under the Functional Description Added new text to the beginning of the Initialization topic
SERCOM	Added new paragraphs to Signal Description Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section
SERCOM USART	Added I/O content to the Signal Description Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section
SERCOM SPI	Added I/O content to the Signal Description Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section
SERCOM I²C	Added I/O content to the Signal Description Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section
CAN	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed or updated the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic
TC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic
TCC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic
CCL	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section Updated Sleep Mode operation with a new first paragraph
ADC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section Updated Sleep Mode operation with a new first paragraph
AC	Moved I/O information into the Signal Description Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional description section Updated Sleep Mode operation with a new first paragraph
DAC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new text to the beginning of the Initialization topic Moved Debug Operation under the Functional Description section Updated Sleep Mode operation with a new first paragraph
PTC	Moved I/O information into the Signal Description Moved information on Self Capacitance and Mutual Capacitance to the Block Diagram Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies
FREQM	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Added new text to the beginning of the Initialization topic
PDEC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Added new text to the beginning of the Initialization topic
ICM	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Added new sub chapter, Sleep Mode Operation
SMBIST	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Added new text to the beginning of the Initialization topic Added new sub chapters; Basic Operation and Sleep Mode Operation
MCRAMC	Renamed Product Dependencies to Peripheral Dependencies and added a new table Removed the subtopics to Peripheral Dependencies Moved Debug Operation under the Functional Description section Updated the following registers to properly display a note: FLTPTR FLTADR
Electrical Characteristics	Updated the following sections with new information for min, typ and max specs, along with new notes, and updated diagrams: Electrical Characteristics Thermal Conditions Power Supply CPU Active Power CPU Idle Power CPU Standby Power Wakeup Timing Electrical Specifications Peripheral Active Current I/O Pin AC/DC Electrical Specifications Internal Voltage Reference Specifications Maximum Clock Frequencies Electrical Specifications XOSC Electrical Specifications XOSC32K Electrical Specifications Internal 32.768 kHz RC Oscillator (OSC32K) Electrical Specifications Internal 48 MHz RC Oscillator (OSC48M) Electrical Specifications Ultra Low Power Internal 32kHz RC Oscillator (OSCULP32K) CPU Frequency and Frequency Digital Phase DAC AC Electrical Specifications ADC AC Electrical Specifications Analog Comparator (AC) AC Electrical Specifications Peripheral Touch Controller (PTC) Electrical Specifications SERCOM SPIx Mode Electrical Specifications SERCOM USART AC Electrical Specifications SERCOM I²C Electrical Specifications Control Area Network (CAN) AC Electrical Specifications TC Input AC Electrical specifications TCC AC Electrical Specifications Flash NVM Electrical Specifications FREQM AC Electrical Specifications Position Decoder (PDEC) AC Electrical Specifications
Electrical Characteristics at 125°C	New chapter added for this revision.
Packaging	Updated the packaging images for the 64-pin VQFN
Schematic Checklist	Added the following sections: Decoupling Capacitors 32.768 kHz External Clock Source Debugging or Programming Pins Designing for High Speed Peripherals

Revision A - June 2020

This is the initial released version of this document.