component
ATMEGA128A-AUR
Public Made by Adomby adom
Microchip Tech Microcontrollers (MCU/MPU/SOC), TQFP-64(14x14). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ATMEGA128A-AUR
Microchip Tech · Microcontrollers (MCU/MPU/SOC) · TQFP-64(14x14)
ATMEGA128A-AUR from Microchip Tech, in a TQFP-64(14x14). 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 | PEN | input | Programming enable pin for SPI Serial Programming mode, internally pulled high; holding it low during Power-on Reset enters SPI programming mode, no function in normal operation. |
| 2 | PE0 | bidirectional | Port E bit 0 bi-directional I/O with internal pull-up; alternate functions RXD0/PDI. |
| 3 | PE1 | bidirectional | Port E bit 1 bi-directional I/O with internal pull-up; alternate functions TXD0/PDO. |
| 4 | PE2 | bidirectional | Port E bit 2 bi-directional I/O with internal pull-up; alternate functions XCK0/AIN0. |
| 5 | PE3 | bidirectional | Port E bit 3 bi-directional I/O with internal pull-up; alternate functions OC3A/AIN1. |
| 6 | PE4 | bidirectional | Port E bit 4 bi-directional I/O with internal pull-up; alternate functions OC3B/INT4. |
| 7 | PE5 | bidirectional | Port E bit 5 bi-directional I/O with internal pull-up; alternate functions OC3C/INT5. |
| 8 | PE6 | bidirectional | Port E bit 6 bi-directional I/O with internal pull-up; alternate functions T3/INT6. |
| 9 | PE7 | bidirectional | Port E bit 7 bi-directional I/O with internal pull-up; alternate functions ICP3/INT7. |
| 10 | PB0 | bidirectional | Port B bit 0 bi-directional I/O with internal pull-up; alternate function SS. |
| 11 | PB1 | bidirectional | Port B bit 1 bi-directional I/O with internal pull-up; alternate function SCK. |
| 12 | PB2 | bidirectional | Port B bit 2 bi-directional I/O with internal pull-up; alternate function MOSI. |
| 13 | PB3 | bidirectional | Port B bit 3 bi-directional I/O with internal pull-up; alternate function MISO. |
| 14 | PB4 | bidirectional | Port B bit 4 bi-directional I/O with internal pull-up; alternate function OC0. |
| 15 | PB5 | bidirectional | Port B bit 5 bi-directional I/O with internal pull-up; alternate function OC1A. |
| 16 | PB6 | bidirectional | Port B bit 6 bi-directional I/O with internal pull-up; alternate function OC1B. |
| 17 | PB7 | bidirectional | Port B bit 7 bi-directional I/O with internal pull-up; alternate functions OC2/OC1C. |
| 18 | PG3 | bidirectional | Port G bit 3 bi-directional I/O with internal pull-up; alternate function TOSC2 (oscillator pin). |
| 19 | PG4 | bidirectional | Port G bit 4 bi-directional I/O with internal pull-up; alternate function TOSC1 (oscillator pin). |
| 20 | RESET | input | Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running. |
| 21 | VCC | power_in | Digital supply voltage. |
| 22 | GND | power_in | Ground. |
| 23 | XTAL2 | output | Output from the inverting Oscillator amplifier. |
| 24 | XTAL1 | input | Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. |
| 25 | PD0 | bidirectional | Port D bit 0 bi-directional I/O with internal pull-up; alternate functions SCL/INT0. |
| 26 | PD1 | bidirectional | Port D bit 1 bi-directional I/O with internal pull-up; alternate functions SDA/INT1. |
| 27 | PD2 | bidirectional | Port D bit 2 bi-directional I/O with internal pull-up; alternate functions RXD1/INT2. |
| 28 | PD3 | bidirectional | Port D bit 3 bi-directional I/O with internal pull-up; alternate functions TXD1/INT3. |
| 29 | PD4 | bidirectional | Port D bit 4 bi-directional I/O with internal pull-up; alternate function ICP1. |
| 30 | PD5 | bidirectional | Port D bit 5 bi-directional I/O with internal pull-up; alternate function XCK1. |
| 31 | PD6 | bidirectional | Port D bit 6 bi-directional I/O with internal pull-up; alternate function T1. |
| 32 | PD7 | bidirectional | Port D bit 7 bi-directional I/O with internal pull-up; alternate function T2. |
| 33 | PG0 | bidirectional | Port G bit 0 bi-directional I/O with internal pull-up; alternate function WR external memory write strobe. |
| 34 | PG1 | bidirectional | Port G bit 1 bi-directional I/O with internal pull-up; alternate function RD external memory read strobe. |
| 35 | PC0 | bidirectional | Port C bit 0 bi-directional I/O with internal pull-up; external memory address A8. |
| 36 | PC1 | bidirectional | Port C bit 1 bi-directional I/O with internal pull-up; external memory address A9. |
| 37 | PC2 | bidirectional | Port C bit 2 bi-directional I/O with internal pull-up; external memory address A10. |
| 38 | PC3 | bidirectional | Port C bit 3 bi-directional I/O with internal pull-up; external memory address A11. |
| 39 | PC4 | bidirectional | Port C bit 4 bi-directional I/O with internal pull-up; external memory address A12. |
| 40 | PC5 | bidirectional | Port C bit 5 bi-directional I/O with internal pull-up; external memory address A13. |
| 41 | PC6 | bidirectional | Port C bit 6 bi-directional I/O with internal pull-up; external memory address A14. |
| 42 | PC7 | bidirectional | Port C bit 7 bi-directional I/O with internal pull-up; external memory address A15. |
| 43 | PG2 | bidirectional | Port G bit 2 bi-directional I/O with internal pull-up; alternate function ALE external memory address latch enable. |
| 44 | PA7 | bidirectional | Port A bit 7 bi-directional I/O with internal pull-up; external memory address/data AD7. |
| 45 | PA6 | bidirectional | Port A bit 6 bi-directional I/O with internal pull-up; external memory address/data AD6. |
| 46 | PA5 | bidirectional | Port A bit 5 bi-directional I/O with internal pull-up; external memory address/data AD5. |
| 47 | PA4 | bidirectional | Port A bit 4 bi-directional I/O with internal pull-up; external memory address/data AD4. |
| 48 | PA3 | bidirectional | Port A bit 3 bi-directional I/O with internal pull-up; external memory address/data AD3. |
| 49 | PA2 | bidirectional | Port A bit 2 bi-directional I/O with internal pull-up; external memory address/data AD2. |
| 50 | PA1 | bidirectional | Port A bit 1 bi-directional I/O with internal pull-up; external memory address/data AD1. |
| 51 | PA0 | bidirectional | Port A bit 0 bi-directional I/O with internal pull-up; external memory address/data AD0. |
| 52 | VCC | power_in | Digital supply voltage. |
| 53 | GND | power_in | Ground. |
| 54 | PF7 | bidirectional | Port F bit 7, ADC input channel 7 or I/O; JTAG TDI, pull-up activated even during Reset if JTAG is enabled. |
| 55 | PF6 | bidirectional | Port F bit 6, ADC input channel 6 or I/O; JTAG TDO, tri-stated unless TAP states that shift out data are entered. |
| 56 | PF5 | bidirectional | Port F bit 5, ADC input channel 5 or I/O; JTAG TMS, pull-up activated even during Reset if JTAG is enabled. |
| 57 | PF4 | bidirectional | Port F bit 4, ADC input channel 4 or I/O; JTAG TCK, pull-up activated even during Reset if JTAG is enabled. |
| 58 | PF3 | bidirectional | Port F bit 3, analog input ADC3 to the A/D Converter or digital I/O. |
| 59 | PF2 | bidirectional | Port F bit 2, analog input ADC2 to the A/D Converter or digital I/O. |
| 60 | PF1 | bidirectional | Port F bit 1, analog input ADC1 to the A/D Converter or digital I/O. |
| 61 | PF0 | bidirectional | Port F bit 0, analog input ADC0 to the A/D Converter or digital I/O. |
| 62 | AREF | input | Analog reference pin for the A/D Converter. |
| 63 | GND | power_in | Ground. |
| 64 | AVCC | power_in | Supply voltage pin for Port F and the A/D Converter; must be connected to VCC even if ADC is unused, through a low-pass filter if ADC is used. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-64(14x14) |
| Category | Embedded Processors & Controllers |
| Pins | 64 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage | 2.7 | 5.5 | V | Speed 16 MHz | 6 | ||
| Speed grade (operating frequency) | 0 | 16 | MHz | 2 | |||
| Operational temperature range (Industrial) | -40 | 85 | °C | Industrial operational range | 6 |
CAD (KiCad official)
- Symbol:
ATMEGA128A-AUR - Footprint:
Package_QFP:TQFP-64_14x14mm_P0.8mm - 3D model: TQFP-64(14x14) (KiCad packages3D, STEP)
- 3D model files:
atmega128a-aur-etched.step/atmega128a-aur-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega128a-aur.step/atmega128a-aur.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (20 pp, sha256
3e7097d1b104e6eb, retrieved 2026-10-20, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# ATMEGA128A-AUR
**Microchip Tech** · Microcontrollers (MCU/MPU/SOC) · TQFP-64(14x14)
ATMEGA128A-AUR from Microchip Tech, in a TQFP-64(14x14). 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 | PEN | input | Programming enable pin for SPI Serial Programming mode, internally pulled high; holding it low during Power-on Reset enters SPI programming mode, no function in normal operation. |
| 2 | PE0 | bidirectional | Port E bit 0 bi-directional I/O with internal pull-up; alternate functions RXD0/PDI. |
| 3 | PE1 | bidirectional | Port E bit 1 bi-directional I/O with internal pull-up; alternate functions TXD0/PDO. |
| 4 | PE2 | bidirectional | Port E bit 2 bi-directional I/O with internal pull-up; alternate functions XCK0/AIN0. |
| 5 | PE3 | bidirectional | Port E bit 3 bi-directional I/O with internal pull-up; alternate functions OC3A/AIN1. |
| 6 | PE4 | bidirectional | Port E bit 4 bi-directional I/O with internal pull-up; alternate functions OC3B/INT4. |
| 7 | PE5 | bidirectional | Port E bit 5 bi-directional I/O with internal pull-up; alternate functions OC3C/INT5. |
| 8 | PE6 | bidirectional | Port E bit 6 bi-directional I/O with internal pull-up; alternate functions T3/INT6. |
| 9 | PE7 | bidirectional | Port E bit 7 bi-directional I/O with internal pull-up; alternate functions ICP3/INT7. |
| 10 | PB0 | bidirectional | Port B bit 0 bi-directional I/O with internal pull-up; alternate function SS. |
| 11 | PB1 | bidirectional | Port B bit 1 bi-directional I/O with internal pull-up; alternate function SCK. |
| 12 | PB2 | bidirectional | Port B bit 2 bi-directional I/O with internal pull-up; alternate function MOSI. |
| 13 | PB3 | bidirectional | Port B bit 3 bi-directional I/O with internal pull-up; alternate function MISO. |
| 14 | PB4 | bidirectional | Port B bit 4 bi-directional I/O with internal pull-up; alternate function OC0. |
| 15 | PB5 | bidirectional | Port B bit 5 bi-directional I/O with internal pull-up; alternate function OC1A. |
| 16 | PB6 | bidirectional | Port B bit 6 bi-directional I/O with internal pull-up; alternate function OC1B. |
| 17 | PB7 | bidirectional | Port B bit 7 bi-directional I/O with internal pull-up; alternate functions OC2/OC1C. |
| 18 | PG3 | bidirectional | Port G bit 3 bi-directional I/O with internal pull-up; alternate function TOSC2 (oscillator pin). |
| 19 | PG4 | bidirectional | Port G bit 4 bi-directional I/O with internal pull-up; alternate function TOSC1 (oscillator pin). |
| 20 | RESET | input | Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running. |
| 21 | VCC | power_in | Digital supply voltage. |
| 22 | GND | power_in | Ground. |
| 23 | XTAL2 | output | Output from the inverting Oscillator amplifier. |
| 24 | XTAL1 | input | Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. |
| 25 | PD0 | bidirectional | Port D bit 0 bi-directional I/O with internal pull-up; alternate functions SCL/INT0. |
| 26 | PD1 | bidirectional | Port D bit 1 bi-directional I/O with internal pull-up; alternate functions SDA/INT1. |
| 27 | PD2 | bidirectional | Port D bit 2 bi-directional I/O with internal pull-up; alternate functions RXD1/INT2. |
| 28 | PD3 | bidirectional | Port D bit 3 bi-directional I/O with internal pull-up; alternate functions TXD1/INT3. |
| 29 | PD4 | bidirectional | Port D bit 4 bi-directional I/O with internal pull-up; alternate function ICP1. |
| 30 | PD5 | bidirectional | Port D bit 5 bi-directional I/O with internal pull-up; alternate function XCK1. |
| 31 | PD6 | bidirectional | Port D bit 6 bi-directional I/O with internal pull-up; alternate function T1. |
| 32 | PD7 | bidirectional | Port D bit 7 bi-directional I/O with internal pull-up; alternate function T2. |
| 33 | PG0 | bidirectional | Port G bit 0 bi-directional I/O with internal pull-up; alternate function WR external memory write strobe. |
| 34 | PG1 | bidirectional | Port G bit 1 bi-directional I/O with internal pull-up; alternate function RD external memory read strobe. |
| 35 | PC0 | bidirectional | Port C bit 0 bi-directional I/O with internal pull-up; external memory address A8. |
| 36 | PC1 | bidirectional | Port C bit 1 bi-directional I/O with internal pull-up; external memory address A9. |
| 37 | PC2 | bidirectional | Port C bit 2 bi-directional I/O with internal pull-up; external memory address A10. |
| 38 | PC3 | bidirectional | Port C bit 3 bi-directional I/O with internal pull-up; external memory address A11. |
| 39 | PC4 | bidirectional | Port C bit 4 bi-directional I/O with internal pull-up; external memory address A12. |
| 40 | PC5 | bidirectional | Port C bit 5 bi-directional I/O with internal pull-up; external memory address A13. |
| 41 | PC6 | bidirectional | Port C bit 6 bi-directional I/O with internal pull-up; external memory address A14. |
| 42 | PC7 | bidirectional | Port C bit 7 bi-directional I/O with internal pull-up; external memory address A15. |
| 43 | PG2 | bidirectional | Port G bit 2 bi-directional I/O with internal pull-up; alternate function ALE external memory address latch enable. |
| 44 | PA7 | bidirectional | Port A bit 7 bi-directional I/O with internal pull-up; external memory address/data AD7. |
| 45 | PA6 | bidirectional | Port A bit 6 bi-directional I/O with internal pull-up; external memory address/data AD6. |
| 46 | PA5 | bidirectional | Port A bit 5 bi-directional I/O with internal pull-up; external memory address/data AD5. |
| 47 | PA4 | bidirectional | Port A bit 4 bi-directional I/O with internal pull-up; external memory address/data AD4. |
| 48 | PA3 | bidirectional | Port A bit 3 bi-directional I/O with internal pull-up; external memory address/data AD3. |
| 49 | PA2 | bidirectional | Port A bit 2 bi-directional I/O with internal pull-up; external memory address/data AD2. |
| 50 | PA1 | bidirectional | Port A bit 1 bi-directional I/O with internal pull-up; external memory address/data AD1. |
| 51 | PA0 | bidirectional | Port A bit 0 bi-directional I/O with internal pull-up; external memory address/data AD0. |
| 52 | VCC | power_in | Digital supply voltage. |
| 53 | GND | power_in | Ground. |
| 54 | PF7 | bidirectional | Port F bit 7, ADC input channel 7 or I/O; JTAG TDI, pull-up activated even during Reset if JTAG is enabled. |
| 55 | PF6 | bidirectional | Port F bit 6, ADC input channel 6 or I/O; JTAG TDO, tri-stated unless TAP states that shift out data are entered. |
| 56 | PF5 | bidirectional | Port F bit 5, ADC input channel 5 or I/O; JTAG TMS, pull-up activated even during Reset if JTAG is enabled. |
| 57 | PF4 | bidirectional | Port F bit 4, ADC input channel 4 or I/O; JTAG TCK, pull-up activated even during Reset if JTAG is enabled. |
| 58 | PF3 | bidirectional | Port F bit 3, analog input ADC3 to the A/D Converter or digital I/O. |
| 59 | PF2 | bidirectional | Port F bit 2, analog input ADC2 to the A/D Converter or digital I/O. |
| 60 | PF1 | bidirectional | Port F bit 1, analog input ADC1 to the A/D Converter or digital I/O. |
| 61 | PF0 | bidirectional | Port F bit 0, analog input ADC0 to the A/D Converter or digital I/O. |
| 62 | AREF | input | Analog reference pin for the A/D Converter. |
| 63 | GND | power_in | Ground. |
| 64 | AVCC | power_in | Supply voltage pin for Port F and the A/D Converter; must be connected to VCC even if ADC is unused, through a low-pass filter if ADC is used. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-64(14x14) |
| Category | Embedded Processors & Controllers |
| Pins | 64 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage | | 2.7 | | 5.5 | V | Speed 16 MHz | 6 |
| Speed grade (operating frequency) | | 0 | | 16 | MHz | | 2 |
| Operational temperature range (Industrial) | | -40 | | 85 | °C | Industrial operational range | 6 |
## CAD (KiCad official)
- Symbol: `ATMEGA128A-AUR`
- Footprint: `Package_QFP:TQFP-64_14x14mm_P0.8mm`
- 3D model: TQFP-64(14x14) (KiCad packages3D, STEP)
- 3D model files: `atmega128a-aur-etched.step` / `atmega128a-aur-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atmega128a-aur.step` / `atmega128a-aur.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183985563652096) (20 pp, sha256 `3e7097d1b104e6eb`, retrieved 2026-10-20, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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](docs/atmega128a-aur-datasheet.pdf)