ATMEGA48PA-AU

@@ -0,0 +1,77 @@+# ATMEGA48PA-AU++**Microchip** · Microcontrollers (MCU/MPU/SOC) · TQFP-32(7x7)++ATMEGA48PA-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/PCINT19/OC2B/INT1 | bidirectional | Port D bit 3, general-purpose bidirectional I/O with internal pull-up. Alt: PCINT19 (pin-change interrupt), OC2B (Timer/Counter2 output-compare B / PWM), INT1 (external interrupt 1). |+| 2 | PD4/PCINT20/XCK/T0 | bidirectional | Port D bit 4, general-purpose bidirectional I/O with internal pull-up. Alt: PCINT20, XCK (USART external clock), T0 (Timer/Counter0 external clock input). |+| 3 | GND | power_in | Digital ground (0 V) reference. |+| 4 | VCC | power_in | Digital supply voltage, 1.8 V to 5.5 V. Decouple locally to GND. |+| 5 | GND | power_in | Digital ground (0 V) reference. |+| 6 | VCC | power_in | Digital supply voltage, 1.8 V to 5.5 V. Decouple locally to GND. |+| 7 | PB6/PCINT6/XTAL1/TOSC1 | bidirectional | Port B bit 6 with pull-up. Depending on CKSEL fuses, serves as XTAL1 (crystal oscillator input) or TOSC1 (async Timer/Counter2 oscillator input when AS2 is set). Otherwise general I/O. |+| 8 | PB7/PCINT7/XTAL2/TOSC2 | bidirectional | Port B bit 7 with pull-up. Depending on CKSEL fuses, serves as XTAL2 (crystal oscillator output) or TOSC2 (async Timer/Counter2 oscillator when AS2 is set). |+| 9 | PD5/PCINT21/OC0B/T1 | bidirectional | Port D bit 5, general-purpose bidirectional I/O with pull-up. Alt: PCINT21, OC0B (Timer/Counter0 output-compare B / PWM), T1 (Timer/Counter1 external clock input). |+| 10 | PD6/PCINT22/OC0A/AIN0 | bidirectional | Port D bit 6, general-purpose bidirectional I/O with pull-up. Alt: PCINT22, OC0A (Timer0 output-compare A / PWM), AIN0 (analog comparator positive input). |+| 11 | PD7/PCINT23/AIN1 | bidirectional | Port D bit 7, general-purpose bidirectional I/O with pull-up. Alt: PCINT23, AIN1 (analog comparator negative input). |+| 12 | PB0/PCINT0/CLKO/ICP1 | bidirectional | Port B bit 0, general-purpose bidirectional I/O with pull-up. Alt: PCINT0, CLKO (system clock output when CKOUT fuse programmed), ICP1 (Timer/Counter1 input capture). |+| 13 | PB1/PCINT1/OC1A | bidirectional | Port B bit 1, general-purpose bidirectional I/O with pull-up. Alt: PCINT1, OC1A (Timer/Counter1 output-compare A / PWM). |+| 14 | PB2/PCINT2/SS/OC1B | bidirectional | Port B bit 2, general-purpose I/O with pull-up. Alt: PCINT2, /SS (SPI slave-select, active low), OC1B (Timer1 output-compare B / PWM). Must be input for SPI master mode. |+| 15 | PB3/PCINT3/OC2A/MOSI | bidirectional | Port B bit 3, general-purpose I/O with pull-up. Alt: PCINT3, OC2A (Timer2 output-compare A / PWM), MOSI (SPI master-out slave-in; also used for ISP serial programming). |+| 16 | PB4/PCINT4/MISO | bidirectional | Port B bit 4, general-purpose I/O with pull-up. Alt: PCINT4, MISO (SPI master-in slave-out; also used for ISP serial programming). |+| 17 | PB5/PCINT5/SCK | bidirectional | Port B bit 5, general-purpose I/O with pull-up. Alt: PCINT5, SCK (SPI serial clock; also used for ISP serial programming). |+| 18 | AVCC | power_in | Analog supply voltage for the ADC and PC3:0/ADC7:6. Must be within 0.3 V of VCC; connect to VCC through an LC filter when ADC is used. |+| 19 | ADC6 | input | Analog-only input, ADC channel 6 (10-bit). Available in TQFP/QFN packages only. |+| 20 | AREF | passive | Analog reference input for the ADC. Decouple to GND (typ. 100 nF). |+| 21 | GND | power_in | Ground (0 V) reference (analog return). |+| 22 | ADC7 | input | Analog-only input, ADC channel 7 (10-bit). Available in TQFP/QFN packages only. |+| 23 | PC0/ADC0/PCINT8 | bidirectional | Port C bit 0, general-purpose bidirectional I/O with pull-up. Alt: ADC0 (10-bit ADC channel 0), PCINT8. |+| 24 | PC1/ADC1/PCINT9 | bidirectional | Port C bit 1, general-purpose bidirectional I/O with pull-up. Alt: ADC1, PCINT9. |+| 25 | PC2/ADC2/PCINT10 | bidirectional | Port C bit 2, general-purpose bidirectional I/O with pull-up. Alt: ADC2, PCINT10. |+| 26 | PC3/ADC3/PCINT11 | bidirectional | Port C bit 3, general-purpose bidirectional I/O with pull-up. Alt: ADC3, PCINT11. |+| 27 | PC4/ADC4/SDA/PCINT12 | bidirectional | Port C bit 4, general-purpose I/O with pull-up. Alt: ADC4, SDA (2-wire/I2C serial data), PCINT12. |+| 28 | PC5/ADC5/SCL/PCINT13 | bidirectional | Port C bit 5, general-purpose I/O with pull-up. Alt: ADC5, SCL (2-wire/I2C serial clock), PCINT13. |+| 29 | PC6/RESET/PCINT14 | input | Active-low external reset input (needs pulse ≥ min pulse width). When RSTDISBL fuse is programmed, functions as PC6 general-purpose I/O with different electrical characteristics; also PCINT14. |+| 30 | PD0/RXD/PCINT16 | bidirectional | Port D bit 0, general-purpose bidirectional I/O with pull-up. Alt: RXD (USART receive data), PCINT16. |+| 31 | PD1/TXD/PCINT17 | bidirectional | Port D bit 1, general-purpose bidirectional I/O with pull-up. Alt: TXD (USART transmit data), PCINT17. |+| 32 | PD2/INT0/PCINT18 | bidirectional | Port D bit 2, general-purpose bidirectional I/O with pull-up. Alt: INT0 (external interrupt 0), PCINT18. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | TQFP-32(7x7) |+| Category | MCU |+| Pins | 32 |++## Ordering variants++- `ATMEGA48PA-AUAU`+- `ATMEGA48PA-AUAUR`+- `ATMEGA48PA-AUPU`+- `ATMEGA48PA-AUMU`+- `ATMEGA48PA-AUMMH`+- `ATMEGA48PA-AUMU`+- `ATMEGA48PA-AUMUR`++## CAD (KiCad official)++- Symbol: `ATMEGA48PA-AU`+- Footprint: `Package_QFP:LQFP-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/atmega48pa-au-datasheet.pdf) (26 pp, sha256 `a4fd7bf8176c39b1`, 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/atmega48pa-au-datasheet.pdf)

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