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32-bit Arm Cortex-M0+ with 5V Support, CAN-FD, PTC, and Advanced Analog
32-bit Arm Cortex-M0+ with 5V Support, CAN-FD, PTC, and Advanced Analog
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ATSAMC20E15 ATSAMC20E16 ATSAMC20E17 ATSAMC20E18 ATSAMC20G15 ATSAMC20G16 ATSAMC20G17 ATSAMC20G18 ATSAMC20J15 ATSAMC20J16 ATSAMC20J17 ATSAMC20J18 ATSAMC20N17A ATSAMC20N18A ATSAMC21E15A ATSAMC21E16 ATSAMC21E17 ATSAMC21E18 ATSAMC21G15 ATSAMC21G16 ATSAMC21G17 ATSAMC21G18 ATSAMC21J15 ATSAMC21J16 ATSAMC21J17 ATSAMC21J18 ATSAMC21N17A ATSAMC21N18A ATSAMC20E15A ATSAMC20E16A ATSAMC20E17A ATSAMC20E18A ATSAMC20G15A ATSAMC20G16A ATSAMC20G17A ATSAMC20G18A ATSAMC20J15A ATSAMC20J16A ATSAMC20J17A ATSAMC20J17AU ATSAMC20J18A ATSAMC20J18AU ATSAMC21E16A ATSAMC21E17A ATSAMC21E18A ATSAMC21G15A ATSAMC21G16A ATSAMC21G17A ATSAMC21G18A ATSAMC21J15A ATSAMC21J16A ATSAMC21J17A ATSAMC21J17AU ATSAMC21J18A ATSAMC21J18AU
  1. Home
  2. 24 RTC – Real-Time Counter
  3. 24.5 Product Dependencies
  4. 24.5.1 I/O Lines
  • Features
  • 1 Configuration Summary
  • 2 Ordering Information
  • 3 Block Diagram
  • 4 Pinout
  • 5 Signal Descriptions List
  • 6 I/O Multiplexing and Considerations
  • 7 Power Supply and Start-Up Considerations
  • 8 Product Mapping
  • 9 Memories
  • 10 Processor and Architecture
  • 11 PAC - Peripheral Access Controller
  • 12 Peripherals Configuration Summary
  • 13 DSU - Device Service Unit
  • 14 DIVAS – Divide and Square Root Accelerator
  • 15 Clock System
  • 16 GCLK - Generic Clock Controller

  • 17 MCLK – Main Clock
  • 18 RSTC – Reset Controller
  • 19 PM - Power Manager
  • 20 OSCCTRL – Oscillators Controller
  • 21 OSC32KCTRL – 32.768 kHz Oscillators Controller
  • 22 SUPC – Supply Controller
  • 23 WDT – Watchdog Timer
  • 24 RTC – Real-Time Counter
    • 24.1 Overview
    • 24.2 Features
    • 24.3 Block Diagram
    • 24.4 Signal Description
    • 24.5 Product Dependencies
      • 24.5.1 I/O Lines
      • 24.5.2 Power Management
      • 24.5.3 Clocks
      • 24.5.4 DMA
      • 24.5.5 Interrupts
      • 24.5.6 Events
      • 24.5.7 Debug Operation
      • 24.5.8 Register Access Protection
      • 24.5.9 Analog Connections
    • 24.6 Functional Description
    • 24.7 Register Summary - Mode 0 - 32-Bit Counter
    • 24.8 Register Description - Mode 0 - 32-Bit Counter
    • 24.9 Register Summary - Mode 1 - 16-Bit Counter
    • 24.10 Register Description - Mode 1 - 16-Bit Counter
    • 24.11 Register Summary - Mode 2 - Clock/Calendar
    • 24.12 Register Description - Mode 2 - Clock/Calendar
  • 25 DMAC – Direct Memory Access Controller
  • 26 EIC – External Interrupt Controller
  • 27 NVMCTRL – Nonvolatile Memory Controller
  • 28 PORT - I/O Pin Controller
  • 29 Event System (EVSYS)
  • 30 SERCOM – Serial Communication Interface
  • 31 SERCOM USART - SERCOM Synchronous and Asynchronous Receiver and Transmitter
  • 32 SERCOM SPI – SERCOM Serial Peripheral Interface
  • 33 SERCOM I2C – Inter-Integrated Circuit
  • 34 CAN - Control Area Network (SAM C21 Only)
  • 35 Timer/Counter (TC)
  • 36 Timer/Counter for Control Applications (TCC)
  • 37 Configurable Custom Logic (CCL)
  • 38 ADC - Analog-to-Digital Converter
  • 39 SDADC – Sigma-Delta Analog-to-Digital Converter (SAM C21 only)
  • 40 AC – Analog Comparators
  • 41 DAC – Digital-to-Analog Converter (SAM C21 only)
  • 42 Peripheral Touch Controller (PTC)
  • 43 TSENS – Temperature Sensor
  • 44 FREQM – Frequency Meter
  • 45 Electrical Characteristics 85°C (SAM C20/C21 E/G/J)
  • 46 Electrical Characteristics 105°C (SAM C20/C21 E/G/J)
  • 47 Electrical Characteristics 105°C (SAM C20/C21 N)
  • 48 Electrical Characteristics AEC - Q100 Grade 1, 125°C (SAM C20/C21 E/G/J)
  • 49 Electrical Characteristics AEC - Q100 Grade 1, 125°C (SAM C20/C21 N)
  • 50 Appendix A
  • 51 Appendix B
  • 52 Packaging Information
  • 53 Schematic Checklist
  • 54 Revision History
  • The Microchip Website
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  • Customer Support
  • Product Identification System
  • Microchip Devices Code Protection Feature
  • Legal Notice
  • Trademarks
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24.5.1 I/O Lines

For more information on I/O configurations, refer to the "RTC Pinout" section.

Related Links: 6 I/O Multiplexing and Considerations

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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