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Low-Power, 32-bit Cortex-M0+ MCUs with 12-bit ADC, 10-bit DAC, 256-Channel PTC, RTC, and SERCOM

ATSAMD20E14 ATSAMD20E15 ATSAMD20E16 ATSAMD20E17 ATSAMD20E18 ATSAMD20G14 ATSAMD20G15 ATSAMD20G16 ATSAMD20G17 ATSAMD20G18 ATSAMD20J14 ATSAMD20J15 ATSAMD20J16 ATSAMD20J17 ATSAMD20J18

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16 SYSCTRL – System Controller
16.6 Functional Description
16.6.7 Digital Frequency Locked Loop (DFLL48M) Operation
16.6.7.1 Basic Operation

Features
1 Configuration Summary
2 Ordering Information ⁽¹⁾
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 Peripherals Configuration Summary
12 DSU - Device Service Unit
13 Clock System
14 GCLK - Generic Clock Controller
15 Power Manager (PM)
16 SYSCTRL – System Controller
17 WDT – Watchdog Timer
18 RTC – Real-Time Counter
19 EIC – External Interrupt Controller
20 NVMCTRL – Nonvolatile Memory Controller
21 PORT - I/O Pin Controller
22 Event System (EVSYS)
23 SERCOM – Serial Communication Interface
24 SERCOM USART
25 SERCOM SPI – SERCOM Serial Peripheral Interface
26 SERCOM I²C – Inter-Integrated Circuit
27 TC – Timer/Counter
28 Analog-to-Digital Converter (ADC)
29 AC – Analog Comparators
30 DAC – Digital-to-Analog Converter
31 PTC - Peripheral Touch Controller
32 Electrical Characteristics at 85°C
33 Electrical Characteristics at 105°C
34 AEC-Q100 Electrical Characteristics at 125℃
35 Packaging Information
36 Schematic Checklist
37 Data sheet Revision History
38 Conventions
39 Acronyms and Abbreviations
Microchip Information

16.6.7.1 Basic Operation

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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