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SAM L21 Family Data Sheet SAM L21
SAM L21 Family Data Sheet SAM L21
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  2. 54 Datasheet Revision History
  3. 54.3 Rev. C - 03/2020

SAM L21

  • Introduction
  • Features
  • 1 Description
  • 2 Configuration Summary
  • 3 Ordering Information
  • 4 Block Diagram
  • 5 Pinout
  • 6 Signal Descriptions List
  • 7 I/O Multiplexing and Considerations
  • 8 Analog Connections of Peripherals
  • 9 Power Supply and Start-Up Considerations
  • 10 Product Mapping
  • 11 Memories
  • 12 Processor and Architecture
  • 13 PAC - Peripheral Access Controller
  • 14 Peripherals Configuration Summary
  • 15 DSU - Device Service Unit
  • 16 Clock System
  • 17 GCLK - Generic Clock Controller
  • 18 MCLK – Main Clock
  • 19 RSTC – Reset Controller
  • 20 PM – Power Manager
  • 21 OSCCTRL – Oscillators Controller
  • 22 OSC32KCTRL – 32KHz Oscillators Controller
  • 23 SUPC – Supply Controller
  • 24 WDT – Watchdog Timer
  • 25 RTC – Real-Time Counter
  • 26 DMAC – Direct Memory Access Controller
  • 27 EIC – External Interrupt Controller
  • 28 NVMCTRL – Non-Volatile Memory Controller
  • 29 PORT - I/O Pin Controller
  • 30 EVSYS – Event System
  • 31 SERCOM – Serial Communication Interface
  • 32 SERCOM USART – SERCOM Universal Synchronous and Asynchronous Receiver and Transmitter
  • 33 SERCOM SPI – SERCOM Serial Peripheral Interface
  • 34 SERCOM I2C – SERCOM Inter-Integrated Circuit
  • 35 TC – Timer/Counter
  • 36 TCC – Timer/Counter for Control Applications
  • 37 TRNG – True Random Number Generator
  • 38 AES – Advanced Encryption Standard
  • 39 USB – Universal Serial Bus
  • 40 CCL – Configurable Custom Logic
  • 41 Operational Amplifier Controller (OPAMP)
  • 42 ADC – Analog-to-Digital Converter
  • 43 AC – Analog Comparators
  • 44 DAC – Digital-to-Analog Converter
  • 45 PTC - Peripheral Touch Controller
  • 46 Electrical Characteristics
  • 47 Electrical Characteristics - Extended Temperature Range 105°C
  • 48 Typical Characteristics
  • 49 Appendix A
  • 50 Packaging Information
  • 51 Schematic Checklist
  • 52 Conventions
  • 53 Acronyms and Abbreviations
  • 54 Datasheet Revision History
    • 54.1 Rev. E - 07/2023
    • 54.2 Rev. D - 06/2023
    • 54.3 Rev. C - 03/2020
    • 54.4 Rev B - 02/2020
    • 54.5 Rev. A - 02/2017
    • 54.6 Rev J - 06/2016
    • 54.7 Rev I - 02/2016
    • 54.8 Rev H - 12/2015
    • 54.9 Rev G - 11/2015
    • 54.10 Rev F - 09/2015
    • 54.11 Rev E - 07/2015
    • 54.12 Rev D - 06/2015
    • 54.13 Rev C - 03/2015
    • 54.14 Rev B - 02/2015
    • 54.15 Rev A - 01/2015
  • Microchip Information

54.3 Rev. C - 03/2020

This revision includes the following updates:
SectionDescription
WDTUpdated synchronization requirement for the CLEAR register
CCLNote added for enable-protection of SEQCTRL
ADCUpdated Device Temperature Measurement Description.
Electrical CharactersticsAdded value of register “R” for the OPAMP register ladder.
Appendix. AAdded SIL 2 Enabled Functional Safety Devices.

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.

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