ATmega808/1608/3208/4808
28-pin
28-pin Data Sheet megaAVR 0-series
Introduction
The ATmega808/1608/3208/4808 microcontrollers of the megaAVR 0-series are using the AVR
processor with hardware multiplier, running at up to 20 MHz, with a wide range of Flash sizes up to 48
KB, up to 6 KB of SRAM, and 256 bytes of EEPROM in 28-, 32-, 40-, or 48-pin package. The series uses
the latest technologies from Microchip with a flexible and low-power architecture including Event System
and SleepWalking, accurate analog features and advanced peripherals.
The devices described here offer Flash sizes from 8 KB to 48 KB in a 28-pin package.
Features
AVR CPU
Single-cycle I/O access
Two-level interrupt controller
Two-cycle hardware multiplier
Memories
Up to 48 KB In-system self-programmable Flash memory
256B EEPROM
Up to 6 KB SRAM
Write/Erase endurance:
Flash 10,000 cycles
EEPROM 100,000 cycles
Data retention: 40 Years at 55C
System
Power-on Reset (POR) circuit
Brown-out Detector (BOD)
Clock options:
16/20 MHz low-power internal oscillator
32.768 kHz Ultra Low-Power (ULP) internal oscillator
32.768 kHz external crystal oscillator
External clock input
Single pin Unified Program Debug Interface (UPDI)
Three sleep modes:
Idle with all peripherals running for immediate wake-up
Standby
Configurable operation of selected peripherals
Preliminary Datasheet DS40002018B-page 1
2019 Microchip Technology Inc. ATmega808/1608/3208/4808 28-pin
SleepWalking peripherals
Power-Down with limited wake-up functionality
Peripherals
One 16-bit Timer/Counter type A (TCA) with a dedicated period register and three compare
channels
Three 16-bit Timer/Counter type B with input capture (TCB)
One 16-bit Real-Time Counter (RTC) running from an external crystal or an internal RC oscillator
Three USART with fractional baud rate generator, auto-baud, and start-of-frame detection
Master/slave Serial Peripheral Interface (SPI)
Dual mode Master/Slave TWI with dual address match
Standard mode (Sm, 100 kHz)
Fast mode (Fm, 400 kHz)
Fast mode plus (Fm+, 1 MHz)
Event System for CPU independent and predictable inter-peripheral signaling
Configurable Custom Logic (CCL) with up to four programmable Look-up Tables (LUT)
One Analog Comparator (AC) with a scalable reference input
One 10-bit 150 ksps Analog to Digital Converter (ADC)
Five selectable internal voltage references: 0.55V, 1.1V, 1.5V, 2.5V, and 4.3V
CRC code memory scan hardware
Optional automatic scan before code execution is allowed
Watchdog Timer (WDT) with Window mode, with separate on-chip oscillator
External interrupt on all general purpose pins
I/O and Packages:
23 programmable I/O lines
28-pin SSOP
Temperature Range: -40C to 125C
Speed Grades -40C to 105C:
0-5 MHz @ 1.8V 5.5V
0-10 MHz @ 2.7V 5.5V
0-20 MHz @ 4.5V 5.5V
Speed Grades -40C to 125C:
0-8 MHz @ 2.7V - 5.5V
0-16 MHz @ 4.5V - 5.5V
DS40002018B-page 2
Datasheet Preliminary
2019 Microchip Technology Inc.