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Low-Power, 32-bit Cortex-M0+ MCU with Advanced Analog and PWM
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ATSAMD21E15
ATSAMD21E15L
ATSAMD21E16
ATSAMD21E16L
ATSAMD21E17
ATSAMD21E18
ATSAMD21G15
ATSAMD21G16
ATSAMD21G16L
ATSAMD21G17
ATSAMD21G18
ATSAMD21J15
ATSAMD21J16
ATSAMD21J17
ATSAMD21J18
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21
EIC – External Interrupt Controller
21.6
Functional Description
Features
1
Description
2
Configuration Summary
3
SAM D21 Ordering Information
(1)
4
Block Diagram
5
Pinout
6
Signal Descriptions List
7
I/O Multiplexing and Considerations
8
Power Supply and Start-Up Considerations
9
Product Mapping
10
Memories
11
Processor And Architecture
12
Peripherals Configuration Summary
13
DSU - Device Service Unit
14
Clock System
15
GCLK - Generic Clock Controller
16
PM – Power Manager
17
SYSCTRL – System Controller
18
WDT – Watchdog Timer
19
RTC – Real-Time Counter
20
DMAC – Direct Memory Access Controller
21
EIC – External Interrupt Controller
21.1
Overview
21.2
Features
21.3
Block Diagram
21.4
Signal Description
21.5
Product Dependencies
21.6
Functional Description
21.6.1
Principle of Operation
21.6.2
Basic Operation
21.6.3
External Pin Processing
21.6.4
Additional Features
21.6.5
DMA Operation
21.6.6
Interrupts
21.6.7
Events
21.6.8
Sleep Mode Operation
21.6.9
Synchronization
21.7
Register Summary
21.8
Register Description
22
Nonvolatile Memory Controller (NVMCTRL)
23
PORT - I/O Pin Controller
24
EVSYS – Event System
25
SERCOM – Serial Communication Interface
26
SERCOM USART
27
SERCOM SPI – SERCOM Serial Peripheral Interface
28
SERCOM I
2
C – Inter-Integrated Circuit
29
I2S - Inter-IC Sound Controller
30
TC – Timer/Counter
31
TCC – Timer/Counter for Control Applications
32
USB – Universal Serial Bus
33
ADC – Analog-to-Digital Converter
34
AC – Analog Comparators
35
DAC – Digital-to-Analog Converter
36
Peripheral Touch Controller (PTC)
37
Electrical Characteristics at 85℃
38
Electrical Characteristics at 105°C
39
Electrical Characteristics at 125°C
40
AEC-Q100 125°C Specifications
41
SAM DA1 Electrical Characteristics
42
Appendix A
43
Appendix B
44
Packaging Information
45
Schematic Checklist
46
Conventions
47
Acronyms and Abbreviations
48
Data Sheet Revision History
Microchip Information
21.6 Functional Description
