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 Devices described in this data sheet Devices described in other data sheets Flash 48 KB ATmega4808 ATmega4808 ATmega4809 ATmega4809 32 KB ATmega3208 ATmega3208 ATmega3209 16 KB ATmega1608 ATmega1608 ATmega1609 8 KB ATmega808 ATmega808 ATmega809 Pins 28 32 40 48 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: Complete Datasheet DS40002173C-page 1 2021 Microchip Technology Inc. ATmega4808/4809 Figure 2.megaAVR Device Designations ATmega4809 - MFR - VAO Variant Suffix AVR product family VAO = Automotive Blank = Industrial Flash size in KB Carrier Type Series name R = Tape & Reel Pin count Blank = Tube or Tray 9 = 48 pins (PDIP: 40 pins) Temperature Range 8 = 32 pins (SSOP: 28 pins) F = -40C to +125C (extended) U = -40C to +85C (industrial) Package Type A = TQFP M = VQFN P = PDIP X = SSOP Memory Overview Table 1.Memory Overview Memory Type ATmega808, ATmega1608, ATmega3208, ATmega4808, ATmega809 ATmega1609 ATmega3209 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 ATmega808 ATmega4809 ATmega809 ATmega1608 ATmega1608 ATmega1609 ATmega3208 ATmega3208 ATmega3209 ATmega4808 ATmega4808 ATmega4809 Pins 28 32 40 48 Max. frequency 20 20 20 20 (MHz) 16-bit Timer/Counter 1 1 1 1 type A (TCA) 16-bit Timer/Counter 3 3 4 4 type B (TCB) 12-bit Timer/Counter - - - - type D (TCD) Real-Time Counter 1 1 1 1 (RTC) DS40002173C-page 2 Complete Datasheet 2021 Microchip Technology Inc.