ATmega4808/4809
ATmega4808/4809 Data Sheet
Introduction
The ATmega4808/4809 microcontrollers are part of the megaAVR
®
0-series, which uses the AVR
®
processor with
hardware multiplier running at up to 20 MHz, and offers 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 packages. 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 in this data sheet offer 48 KB in a 28/32/40/48-pin package.
Important: The 40-pin version of the ATmega4809 is using the die of the 48-pin ATmega4809 but offers
fewer connected pads. For this reason, the pins PB[5:0] and PC[7:6] must be disabled (INPUT_DISABLE)
or enable pull-ups (PULLUPEN).
megaAVR
®
0-series Overview
The figure below shows the megaAVR
®
0-series devices, laying out pin count variants and memory sizes:
• Vertical migration is possible without code modification, as these devices are fully pin and feature compatible
• Horizontal migration to the left reduces the pin count and, therefore, the available features
Figure 1. megaAVR
®
0-series Overview
Pins
Flash
Devices described in this data sheet
Devices described in other data sheets
ATmega1608
ATmega3208
ATmega808
ATmega3208 ATmega3209
ATmega1608
ATmega1609
ATmega808
ATmega809
28 40 48
32
ATmega4808 ATmega4808 ATmega4809 ATmega4809
8 KB
16 KB
32 KB
48 KB
Devices with different Flash memory sizes typically also have different SRAM and EEPROM.
The name of a device in the megaAVR 0-series is decoded as follows:
© 2021 Microchip Technology Inc.
Complete Datasheet
DS40002173C-page 1
Figure 2. megaAVR
®
Device Designations
ATmega4809 - MFR - VAO
Flash size in KB
Series name
Pin count
AVR® product family
Variant Suffix
VAO = Automotive
Blank = Industrial
9 = 48 pins (PDIP: 40 pins)
8 = 32 pins (SSOP: 28 pins)
R = Tape & Reel
Blank = Tube or Tray
F = -40°C to +125°C (extended)
U = -40°C to +85°C (industrial)
A = TQFP
M = VQFN
P = PDIP
X = SSOP
Package Type
Temperature Range
Carrier Type
Memory Overview
Table 1. Memory Overview
Memory Type ATmega808,
ATmega809
ATmega1608,
ATmega1609
ATmega3208,
ATmega3209
ATmega4808,
ATmega4809
Flash 8 KB 16 KB 32 KB 48 KB
SRAM 1 KB 2 KB 4 KB 6 KB
EEPROM 256B 256B 256B 256B
User row 32B 32B 64B 64B
Peripheral Overview
Table 2. Peripheral Overview
Feature ATmega808
ATmega1608
ATmega3208
ATmega4808
ATmega808
ATmega1608
ATmega3208
ATmega4808
ATmega4809 ATmega809
ATmega1609
ATmega3209
ATmega4809
Pins 28 32 40 48
Max. frequency
(MHz)
20 20 20 20
16-bit Timer/Counter
type A (TCA)
1 1 1 1
16-bit Timer/Counter
type B (TCB)
3 3 4 4
12-bit Timer/Counter
type D (TCD)
- - - -
Real-Time Counter
(RTC)
1 1 1 1
ATmega4808/4809
© 2021 Microchip Technology Inc.
Complete Datasheet
DS40002173C-page 2