attiny88-au

@@ -0,0 +1,81 @@+# ATTINY88-AU++**Microchip** · Microcontrollers (MCU/MPU/SOC) · TQFP-32(7x7)++ATTINY88-AU from Microchip, in a TQFP-32(7x7). 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 | PD3 | bidirectional | Port D bit 3, general-purpose I/O with internal pull-up. Alt: PCINT19 (pin-change interrupt), INT1 (external interrupt 1). |+| 2 | PD4 | bidirectional | Port D bit 4, general-purpose I/O with internal pull-up. Alt: PCINT20, T0 (Timer/Counter0 external clock input). |+| 3 | PA2 | bidirectional | Port A bit 2, general-purpose I/O with internal pull-up (32-lead packages only). Alt: PCINT26. |+| 4 | VCC | power_in | Digital supply voltage, 1.8-5.5 V. Bypass with local decoupling capacitor to GND. |+| 5 | GND | power_in | Digital ground return. |+| 6 | PA3 | bidirectional | Port A bit 3, general-purpose I/O with internal pull-up (32-lead packages only). Alt: PCINT27. |+| 7 | PB6/CLKI | bidirectional | Port B bit 6, general-purpose I/O with internal pull-up. Alt: PCINT6, CLKI (external clock / crystal oscillator input, depending on CKSEL fuse). |+| 8 | PB7 | bidirectional | Port B bit 7, general-purpose I/O with internal pull-up. Alt: PCINT7. In external crystal mode this pin pairs with PB6 as XTAL2 (oscillator output). |+| 9 | PD5 | bidirectional | Port D bit 5, general-purpose I/O with internal pull-up. Alt: PCINT21, T1 (Timer/Counter1 external clock input). |+| 10 | PD6 | bidirectional | Port D bit 6, general-purpose I/O with internal pull-up. Alt: PCINT22, AIN0 (analog comparator positive input). |+| 11 | PD7 | bidirectional | Port D bit 7, general-purpose I/O with internal pull-up. Alt: PCINT23, AIN1 (analog comparator negative input). |+| 12 | PB0 | bidirectional | Port B bit 0, general-purpose I/O with internal pull-up. Alt: PCINT0, CLKO (system clock output when CKOUT fuse programmed), ICP1 (Timer/Counter1 input capture). |+| 13 | PB1 | bidirectional | Port B bit 1, general-purpose I/O with internal pull-up. Alt: PCINT1, OC1A (Timer/Counter1 compare-match output A / PWM). |+| 14 | PB2/SS | bidirectional | Port B bit 2, general-purpose I/O with internal pull-up. Alt: PCINT2, SS (SPI slave-select, active-low), OC1B (Timer/Counter1 compare-match output B / PWM). |+| 15 | PB3/MOSI | bidirectional | Port B bit 3, general-purpose I/O with internal pull-up. Alt: PCINT3, MOSI (SPI master-out / slave-in data). |+| 16 | PB4/MISO | bidirectional | Port B bit 4, general-purpose I/O with internal pull-up. Alt: PCINT4, MISO (SPI master-in / slave-out data). |+| 17 | PB5/SCK | bidirectional | Port B bit 5, general-purpose I/O with internal pull-up. Alt: PCINT5, SCK (SPI clock). |+| 18 | AVCC | power_in | Analog supply pin for the ADC and for I/O pins PC7, PC[5:0] and (32-lead only) PA[1:0]. Must be connected to VCC even if the ADC is unused; connect through an LC low-pass filter when ADC accuracy matters. |+| 19 | PA0 | bidirectional | Port A bit 0, general-purpose I/O with internal pull-up (32-lead only), powered from AVCC. Alt: ADC6 (ADC channel 6, 10-bit), PCINT24. |+| 20 | PC7 | bidirectional | Port C bit 7, general-purpose I/O with internal pull-up, powered from AVCC. Alt: PCINT15. |+| 21 | GND | power_in | Analog/second ground return; tie to system GND plane. |+| 22 | PA1 | bidirectional | Port A bit 1, general-purpose I/O with internal pull-up (32-lead only), powered from AVCC. Alt: ADC7 (ADC channel 7, 10-bit), PCINT25. |+| 23 | PC0 | bidirectional | Port C bit 0, general-purpose I/O with internal pull-up, powered from AVCC. Alt: ADC0 (ADC channel 0), PCINT8. |+| 24 | PC1 | bidirectional | Port C bit 1, general-purpose I/O with internal pull-up, powered from AVCC. Alt: ADC1 (ADC channel 1), PCINT9. |+| 25 | PC2 | bidirectional | Port C bit 2, general-purpose I/O with internal pull-up, powered from AVCC. Alt: ADC2 (ADC channel 2), PCINT10. |+| 26 | PC3 | bidirectional | Port C bit 3, general-purpose I/O with internal pull-up, powered from AVCC. Alt: ADC3 (ADC channel 3), PCINT11. |+| 27 | PC4/SDA | bidirectional | Port C bit 4, general-purpose I/O with internal pull-up, powered from AVCC. Alt: ADC4 (ADC channel 4), SDA (2-wire/I2C data line), PCINT12. |+| 28 | PC5/SCL | bidirectional | Port C bit 5, general-purpose I/O with internal pull-up, powered from AVCC. Alt: ADC5 (ADC channel 5), SCL (2-wire/I2C clock line), PCINT13. |+| 29 | PC6/RESET | input | Reset input (active-low) by default; asserting low for longer than the minimum pulse width triggers a reset even when the clock is stopped. If the RSTDISBL fuse is programmed, this pin becomes a general-purpose I/O (PC6) with electrical characteristics that differ from the rest of Port C. |+| 30 | PD0 | bidirectional | Port D bit 0, general-purpose I/O with internal pull-up. Alt: PCINT16. |+| 31 | PD1 | bidirectional | Port D bit 1, general-purpose I/O with internal pull-up. Alt: PCINT17. |+| 32 | PD2 | bidirectional | Port D bit 2, general-purpose I/O with internal pull-up. Alt: PCINT18, INT0 (external interrupt 0). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | TQFP-32(7x7) |+| Category | MCU |+| Pins | 32 |++## Ordering variants++- `ATTINY88-AU`+- `ATTINY88-AUR`+- `ATTINY88-AUMU`+- `ATTINY88-AUMUR`+- `ATTINY88-AUCCU`+- `ATTINY88-AUCCUR`+- `ATTINY88-AUMMU`+- `ATTINY88-AUMMUR`+- `ATTINY88-AUMMH`+- `ATTINY88-AUMMHR`+- `ATTINY88-AUPU`++## CAD (KiCad official)++- Symbol: `ATTINY88-AU`+- Footprint: `Package_QFP:TQFP-32_7x7mm_P0.8mm`+- 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip datasheet](docs/attiny88-au-datasheet.pdf) (None pp, sha256 `c7d2ab2d8f58a090`, 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/attiny88-au-datasheet.pdf)