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AVR® DA Family AVR64DA28/32/48/64
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24
RTC - Real-Time Counter
AVR64DA28/32/48/64
Introduction
AVR® DA(S)
Family Overview
Features
1
Block Diagram
2
Pinout
3
I/O Multiplexing and Considerations
4
Hardware Guidelines
5
Conventions
6
AVR® CPU
7
Memories
8
Peripherals and Architecture
9
GPR - General Purpose Registers
10
NVMCTRL - Nonvolatile Memory Controller
11
CLKCTRL - Clock Controller
12
SLPCTRL - Sleep Controller
13
RSTCTRL - Reset Controller
14
CPUINT - CPU Interrupt Controller
15
EVSYS - Event System
16
PORTMUX - Port Multiplexer
17
PORT - I/O Pin Configuration
18
BOD - Brown-out Detector
19
VREF - Voltage Reference
20
WDT - Watchdog Timer
21
TCA - 16-bit Timer/Counter Type A
22
TCB - 16-Bit Timer/Counter Type B
23
TCD - 12-Bit Timer/Counter Type D
24
RTC - Real-Time Counter
24.1
Features
24.2
Overview
24.3
Clocks
24.4
RTC Functional Description
24.5
PIT Functional Description
24.6
Crystal Error Correction
24.7
Events
24.8
Interrupts
24.9
Sleep Mode Operation
24.10
Synchronization
24.11
Debug Operation
24.12
Register Summary
24.13
Register Description
25
USART - Universal Synchronous and Asynchronous Receiver and Transmitter
26
SPI - Serial Peripheral Interface
27
TWI - Two-Wire Interface
28
CRCSCAN - Cyclic Redundancy Check Memory Scan
29
CCL - Configurable Custom Logic
30
AC - Analog Comparator
31
ADC - Analog-to-Digital Converter
32
DAC - Digital-to-Analog Converter
33
PTC - Peripheral Touch Controller
34
ZCD - Zero-Cross Detector
35
UPDI - Unified Program and Debug Interface
36
Instruction Set Summary
37
Electrical Characteristics
38
Characteristics Graphs
39
Ordering Information
40
Package Drawings
41
Data Sheet Revision History
Microchip Information
24 RTC - Real-Time Counter
