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ATMEGA3209-AUR

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-48(7x7)

ATMEGA3209-AUR from Microchip Tech, in a TQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 PA5 bidirectional General-purpose I/O pin PA5 with alternate functions USART0 RxD (alternate position), SPI0 MISO (alternate position) and TCA0 WO5 (alternate position); it can be used as an event input and for external interrupt.
2 PA6 bidirectional General-purpose I/O pin PA6 with alternate functions USART0 XCK (alternate position), SPI0 SCK (alternate position) and CCL LUT0-OUT (alternate position); it can be used as an event input and for external interrupt.
3 PA7 bidirectional General-purpose I/O pin PA7 with alternate functions CLKOUT, AC0 OUT, USART0 XDIR (alternate position), SPI0 SS and EVOUTA (alternate position); it can be used as an event input and for external interrupt.
4 PB0 bidirectional General-purpose I/O pin PB0 with alternate functions USART3 TxD (alternate position) and TCA0 WO0 (alternate position); it can be used as an event input and for external interrupt.
5 PB1 bidirectional General-purpose I/O pin PB1 with alternate functions USART3 RxD (alternate position) and TCA0 WO1 (alternate position); it can be used as an event input and for external interrupt.
6 PB2 bidirectional General-purpose I/O pin PB2 with alternate functions USART3 XCK (alternate position), TCA0 WO2 (alternate position) and EVOUTB; it can be used as an event input and for external interrupt.
7 PB3 bidirectional General-purpose I/O pin PB3 with alternate functions USART3 XDIR (alternate position) and TCA0 WO3 (alternate position); it can be used as an event input and for external interrupt.
8 PB4 bidirectional General-purpose I/O pin PB4 with alternate functions USART3 TxD (alternate position), TCA0 WO4 (alternate position) and TCB2 WO (alternate position); it can be used as an event input and for external interrupt.
9 PB5 bidirectional General-purpose I/O pin PB5 with alternate functions USART3 RxD (alternate position), TCA0 WO5 (alternate position) and TCB3 WO; it can be used as an event input and for external interrupt.
10 PC0 bidirectional General-purpose I/O pin PC0 with alternate functions USART1 TxD, SPI0 MOSI (alternate position), TCA0 WO0 (alternate position), TCB2 WO and CCL LUT1-IN0; it can be used as an event input and for external interrupt.
11 PC1 bidirectional General-purpose I/O pin PC1 with alternate functions USART1 RxD, SPI0 MISO (alternate position), TCA0 WO1 (alternate position), TCB3 WO (alternate position) and CCL LUT1-IN1; it can be used as an event input and for external interrupt.
12 PC2 bidirectional General-purpose I/O pin PC2 with alternate functions TWI0 SDA (master, alternate position), USART1 XCK, SPI0 SCK (alternate position), TCA0 WO2 (alternate position), EVOUTC and CCL LUT1-IN2; it can be used as an event input and for external interrupt.
13 PC3 bidirectional General-purpose I/O pin PC3 with alternate functions TWI0 SCL (master, alternate position), USART1 XDIR, SPI0 SS (alternate position), TCA0 WO3 (alternate position) and CCL LUT1-OUT; it can be used as an event input and for external interrupt.
14 VDD power_in Input supply for the VDD power domain; the device operates from 1.8 V to 5.5 V per the ordering information.
15 GND power_in Ground reference for the device.
16 PC4 bidirectional General-purpose I/O pin PC4 with alternate functions USART1 TxD (alternate position) and TCA0 WO4 (alternate position); it can be used as an event input and for external interrupt.
17 PC5 bidirectional General-purpose I/O pin PC5 with alternate functions USART1 RxD (alternate position) and TCA0 WO5 (alternate position); it can be used as an event input and for external interrupt.
18 PC6 bidirectional General-purpose I/O pin PC6 with alternate functions USART1 XCK (alternate position) and CCL LUT1-OUT (alternate position); it can be used as an event input and for external interrupt.
19 PC7 bidirectional General-purpose I/O pin PC7 with alternate functions USART1 XDIR (alternate position) and EVOUTC (alternate position); it can be used as an event input and for external interrupt.
20 PD0 bidirectional General-purpose I/O pin PD0 with analog input AIN0 (ADC0), alternate function TCA0 WO0 (alternate position) and CCL LUT2-IN0; it can be used as an event input and for external interrupt.
21 PD1 bidirectional General-purpose I/O pin PD1 with analog input AIN1 (ADC0), analog comparator AC0 positive input P3, alternate function TCA0 WO1 (alternate position) and CCL LUT2-IN1; it can be used as an event input and for external interrupt.
22 PD2 bidirectional General-purpose I/O pin PD2 with analog input AIN2 (ADC0), analog comparator AC0 positive input P0, alternate function TCA0 WO2 (alternate position), EVOUTD and CCL LUT2-IN2; it can be used as an event input and for external interrupt.
23 PD3 bidirectional General-purpose I/O pin PD3 with analog input AIN3 (ADC0), analog comparator AC0 negative input N0, alternate function TCA0 WO3 (alternate position) and CCL LUT2-OUT; it can be used as an event input and for external interrupt.
24 PD4 bidirectional General-purpose I/O pin PD4 with analog input AIN4 (ADC0), analog comparator AC0 positive input P1 and alternate function TCA0 WO4 (alternate position); it can be used as an event input and for external interrupt.
25 PD5 bidirectional General-purpose I/O pin PD5 with analog input AIN5 (ADC0), analog comparator AC0 negative input N1 and alternate function TCA0 WO5 (alternate position); it can be used as an event input and for external interrupt.
26 PD6 bidirectional General-purpose I/O pin PD6 with analog input AIN6 (ADC0), analog comparator AC0 positive input P2 and CCL LUT2-OUT (alternate position); it can be used as an event input and for external interrupt.
27 PD7 bidirectional General-purpose I/O pin PD7 with external ADC voltage reference VREFA, analog input AIN7 (ADC0), analog comparator AC0 negative input N2 and EVOUTD (alternate position); it can be used as an event input and for external interrupt.
28 AVDD power_in Input supply for the AVDD power domain (analog/ADC supply) for the pins on that domain.
29 GND power_in Ground reference for the device.
30 PE0 bidirectional General-purpose I/O pin PE0 with analog input AIN8 (ADC0), alternate functions SPI0 MOSI (alternate position) and TCA0 WO0 (alternate position); it can be used as an event input and for external interrupt.
31 PE1 bidirectional General-purpose I/O pin PE1 with analog input AIN9 (ADC0), alternate functions SPI0 MISO (alternate position) and TCA0 WO1 (alternate position); it can be used as an event input and for external interrupt.
32 PE2 bidirectional General-purpose I/O pin PE2 with analog input AIN10 (ADC0), alternate functions SPI0 SCK (alternate position), TCA0 WO2 (alternate position) and EVOUTE; it can be used as an event input and for external interrupt.
33 PE3 bidirectional General-purpose I/O pin PE3 with analog input AIN11 (ADC0), alternate functions SPI0 SS (alternate position) and TCA0 WO3 (alternate position); it can be used as an event input and for external interrupt.
34 PF0 (TOSC1) bidirectional General-purpose I/O pin PF0 that serves as the TOSC1 crystal connection for the 32.768 kHz oscillator, with alternate functions USART2 TxD, TCA0 WO0 (alternate position) and CCL LUT3-IN0; it can be used as an event input and for external interrupt.
35 PF1 (TOSC2) bidirectional General-purpose I/O pin PF1 that serves as the TOSC2 crystal connection for the 32.768 kHz oscillator, with alternate functions USART2 RxD, TCA0 WO1 (alternate position) and CCL LUT3-IN1; it can be used as an event input and for external interrupt.
36 PF2 bidirectional General-purpose I/O pin PF2 with analog input AIN12 (ADC0), alternate functions TWI0 SDA (slave, alternate position), USART2 XCK, TCA0 WO2 (alternate position), EVOUTF and CCL LUT3-IN2; it can be used as an event input and for external interrupt.
37 PF3 bidirectional General-purpose I/O pin PF3 with analog input AIN13 (ADC0), alternate functions TWI0 SCL (slave, alternate position), USART2 XDIR, TCA0 WO3 (alternate position) and CCL LUT3-OUT; it can be used as an event input and for external interrupt.
38 PF4 bidirectional General-purpose I/O pin PF4 with analog input AIN14 (ADC0), alternate functions USART2 TxD (alternate position), TCA0 WO4 (alternate position) and TCB0 WO (alternate position); it can be used as an event input and for external interrupt.
39 PF5 bidirectional General-purpose I/O pin PF5 with analog input AIN15 (ADC0), alternate functions USART2 RxD (alternate position), TCA0 WO5 (alternate position) and TCB1 WO (alternate position); it can be used as an event input and for external interrupt.
40 PF6 bidirectional General-purpose I/O pin PF6 that can be configured as the RESET pin via SYSCFG0.RSTPINCFG, with alternate functions USART2 XCK (alternate position) and CCL LUT3-OUT (alternate position); it can be used as an event input and for external interrupt.
41 UPDI bidirectional Unified Program and Debug Interface pin used for programming and debugging the device.
42 VDD power_in Input supply for the VDD power domain; the device operates from 1.8 V to 5.5 V per the ordering information.
43 GND power_in Ground reference for the device.
44 PA0 (EXTCLK) bidirectional General-purpose I/O pin PA0 with external clock input EXTCLK, alternate functions USART0 TxD (alternate position), TCA0 WO0 and CCL LUT0-IN0; it can be used as an event input and for external interrupt.
45 PA1 bidirectional General-purpose I/O pin PA1 with alternate functions USART0 RxD, TCA0 WO1 and CCL LUT0-IN1; it can be used as an event input and for external interrupt.
46 PA2 bidirectional General-purpose I/O pin PA2 with alternate functions TWI0 SDA (master), USART0 XCK, TCA0 WO2, TCB0 WO, EVOUTA and CCL LUT0-IN2; it can be used as an event input and for external interrupt.
47 PA3 bidirectional General-purpose I/O pin PA3 with alternate functions TWI0 SCL (master), USART0 XDIR, TCA0 WO3, TCB1 WO and CCL LUT0-OUT; it can be used as an event input and for external interrupt.
48 PA4 bidirectional General-purpose I/O pin PA4 with alternate functions USART0 TxD (alternate position), SPI0 MOSI and TCA0 WO4; it can be used as an event input and for external interrupt.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-48(7x7)
Category Embedded Processors & Controllers
Pins 48

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage 1.8 5.5 V ATmega3209-AUR (48-pin TQFP, Tape & Reel), from Table 34-1 ordering row 518
Operating temperature range -40 85 °C ATmega3209-AUR (48-pin TQFP, Tape & Reel), from Table 34-1 ordering row 518
Max. CPU speed 20 MHz ATmega3209-AUR (48-pin TQFP, Tape & Reel), from Table 34-1 ordering row 518

CAD (KiCad official)

  • Symbol: ATMEGA3209-AUR
  • Footprint: Package_QFP:TQFP-48_7x7mm_P0.5mm
  • 3D model: TQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: atmega3209-aur-etched.step / atmega3209-aur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega3209-aur.step / atmega3209-aur.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (547 pp, sha256 8964762f5bd2fdc0, retrieved 2026-10-26, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF