AVR128DA28T-I/SO

@@ -0,0 +1,82 @@+# AVR128DA28T-I++**Microchip Tech** · Microcontrollers (MCU/MPU/SOC) · SOIC-28-300mil++AVR128DA28T-I from Microchip Tech, in a SOIC-28-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | PA7 | bidirectional | PORTA bit 7 GPIO. Alt: CLKOUT, PTC X7/Y7, AC0/1/2 OUT, USART0 XDIR (alt), SPI0 SS, TCD0 WOD, EVOUTA (alt). |+| 2 | PC0 | bidirectional | PORTC bit 0 GPIO. Alt: USART1 TxD, SPI1 MOSI, TCA0 WO0 (alt), TCB2 WO, CCL LUT1 IN0. |+| 3 | PC1 | bidirectional | PORTC bit 1 GPIO. Alt: USART1 RxD, SPI1 MISO, TCA0 WO1 (alt), TCB3 WO (alt), CCL LUT1 IN1. |+| 4 | PC2 | bidirectional | PORTC bit 2 GPIO (TWI-capable pad). Alt: USART1 XCK, SPI1 SCK, TWI0 SDA(M) (alt), TCA0 WO2 (alt), EVOUTC, CCL LUT1 IN2. |+| 5 | PC3 | bidirectional | PORTC bit 3 GPIO (TWI-capable pad). Alt: USART1 XDIR, SPI1 SS, TWI0 SCL(M) (alt), TCA0 WO3 (alt), CCL LUT1 OUT. |+| 6 | PD0 | bidirectional | PORTD bit 0 GPIO. Alt: ADC0 AIN0, PTC X16/Y16, AC0/1/2 AINN1, TCA0 WO0 (alt), CCL LUT2 IN0. |+| 7 | PD1 | bidirectional | PORTD bit 1 GPIO. Alt: ADC0 AIN1, PTC X17/Y17, ZCD0 ZCIN, TCA0 WO1 (alt), CCL LUT2 IN1. |+| 8 | PD2 | bidirectional | PORTD bit 2 GPIO. Alt: ADC0 AIN2, PTC X18/Y18, AC0/1/2 AINP0, TCA0 WO2 (alt), EVOUTD, CCL LUT2 IN2. |+| 9 | PD3 | bidirectional | PORTD bit 3 GPIO. Alt: ADC0 AIN3, PTC X19/Y19, AC0 AINN0, AC1 AINP1, TCA0 WO3 (alt), CCL LUT2 OUT. |+| 10 | PD4 | bidirectional | PORTD bit 4 GPIO. Alt: ADC0 AIN4, PTC X20/Y20, AC1 AINP2, AC2 AINP1, TCA0 WO4 (alt). |+| 11 | PD5 | bidirectional | PORTD bit 5 GPIO. Alt: ADC0 AIN5, PTC X21/Y21, AC1 AINN0, TCA0 WO5 (alt). |+| 12 | PD6 | bidirectional | PORTD bit 6 GPIO. Alt: ADC0 AIN6, PTC X22/Y22, AC0/1/2 AINP3, DAC0 VOUT, TCB2 OUT (alt). |+| 13 | PD7 | bidirectional | PORTD bit 7 GPIO. Alt: ADC0 VREFA (external ADC/DAC reference input), AIN7, PTC X23/Y23, AC0/1 AINN2, AC2 AINN0/AINN2, EVOUTD (alt). |+| 14 | AVDD | power_in | Analog supply pin, 1.8-5.5 V. Internally connected to VDD on this family, but must be decoupled locally with its own capacitor pair to GND. |+| 15 | GND | power_in | Analog/digital ground return (paired with AVDD). Tie to system ground plane. |+| 16 | PF0/XTAL32K1 | bidirectional | PORTF bit 0 GPIO / 32.768 kHz crystal input XTAL32K1. Alt: ADC0 AIN16 (positive-input only), PTC X32/Y32, USART2 TxD, TCA0 WO0 (alt), TCD0 WOA (alt), CCL LUT3 IN0. |+| 17 | PF1/XTAL32K2 | bidirectional | PORTF bit 1 GPIO / 32.768 kHz crystal output XTAL32K2. Alt: ADC0 AIN17 (positive-input only), PTC X33/Y33, USART2 RxD, TCA0 WO1 (alt), TCD0 WOB (alt), CCL LUT3 IN1. |+| 18 | PF6/RESET | input | External Reset input (active-low), input-only pin. Configurable as GPIO PF6 (input-only) in RSTCTRL. Pull to VDD with a resistor when used as RESET. |+| 19 | UPDI | bidirectional | Unified Program and Debug Interface - single-wire programming/debug pin. Requires 4.7-10 kΩ pull-up to VDD in typical designs. |+| 20 | VDD | power_in | Digital supply pin, 1.8-5.5 V. Decouple locally with 100 nF ceramic to nearby GND (pin 21). |+| 21 | GND | power_in | Digital ground return (paired with VDD). Tie to system ground plane. |+| 22 | PA0/EXTCLK | bidirectional | PORTA bit 0 GPIO / external clock input (EXTCLK) for the main clock. Alt: PTC X0/Y0, USART0 TxD, TCA0 WO0, CCL LUT0 IN0. |+| 23 | PA1 | bidirectional | PORTA bit 1 GPIO. Alt: PTC X1/Y1, USART0 RxD, TCA0 WO1, CCL LUT0 IN1. |+| 24 | PA2 | bidirectional | PORTA bit 2 GPIO (TWI-capable pad). Alt: PTC X2/Y2, USART0 XCK, TWI0 SDA(M) (default), TCA0 WO2, TCD0 WO, EVOUTA, CCL LUT0 IN2. |+| 25 | PA3 | bidirectional | PORTA bit 3 GPIO (TWI-capable pad). Alt: PTC X3/Y3, USART0 XDIR, TWI0 SCL(M) (default), TCA0 WO3, TCA1 WO, CCL LUT0 OUT. |+| 26 | PA4 | bidirectional | PORTA bit 4 GPIO. Alt: PTC X4/Y4, USART0 TxD (alt), SPI0 MOSI, TCA0 WO4, TCD0 WOA. |+| 27 | PA5 | bidirectional | PORTA bit 5 GPIO. Alt: PTC X5/Y5, USART0 RxD (alt), SPI0 MISO, TCA0 WO5, TCD0 WOB. |+| 28 | PA6 | bidirectional | PORTA bit 6 GPIO. Alt: PTC X6/Y6, USART0 XCK (alt), SPI0 SCK, TCD0 WOC, CCL LUT0 OUT (alt). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip Tech |+| Package | SOIC-28-300mil |+| Category | Embedded Processors & Controllers |+| Pins | 28 |++## Ordering variants++Same part, different packaging or reel option.++- `AVR128DA28T-II/SO`+- `AVR128DA28T-IE/SO`+- `AVR128DA28T-II/SS`+- `AVR128DA28T-IE/SS`+- `AVR128DA28T-II/SP`+- `AVR128DA28T-IE/SP`+- `AVR128DA28T-II/RXB`+- `AVR128DA28T-II/PT`+- `AVR128DA28T-IE/RXB`+- `AVR128DA28T-IE/PT`+- `AVR128DA28T-II/6LX`+- `AVR128DA28T-IE/6LX`+- `AVR128DA28T-II/MR`+- `AVR128DA28T-IE/MR`++## CAD (KiCad official)++- Symbol: `AVR128DA28T-I`+- Footprint: `Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm`+- 3D model: SOIC-28-300mil (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589945796516360192) (None pp, sha256 `4623d54c2494b8fd`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/avr128da28t-i-datasheet.pdf)