ATMEGA32A-AU

@@ -0,0 +1,87 @@+# ATMEGA32A-AU++**Microchip** · Microcontrollers (MCU/MPU/SOC) · TQFP-44(10x10)++ATMEGA32A-AU from Microchip, in a TQFP-44(10x10). 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 | PB5/MOSI | bidirectional | Port B bit 5. Alt function: SPI Master Out Slave In. Internal pull-up available. |+| 2 | PB6/MISO | bidirectional | Port B bit 6. Alt function: SPI Master In Slave Out. |+| 3 | PB7/SCK | bidirectional | Port B bit 7. Alt function: SPI Bus Serial Clock. |+| 4 | RESET | input | Active-low external reset input. A low level longer than the minimum pulse width generates a reset even if the clock is not running. |+| 5 | VCC | power_in | Digital supply voltage (2.7-5.5V). |+| 6 | GND | power_in | Digital ground. |+| 7 | XTAL2 | output | Output from the inverting oscillator amplifier. Connect to crystal/resonator with XTAL1. |+| 8 | XTAL1 | input | Input to the inverting oscillator amplifier and internal clock operating circuit. |+| 9 | PD0/RXD | bidirectional | Port D bit 0. Alt function: USART Receive. |+| 10 | PD1/TXD | bidirectional | Port D bit 1. Alt function: USART Transmit. |+| 11 | PD2/INT0 | bidirectional | Port D bit 2. Alt function: External Interrupt 0. |+| 12 | PD3/INT1 | bidirectional | Port D bit 3. Alt function: External Interrupt 1. |+| 13 | PD4/OC1B | bidirectional | Port D bit 4. Alt function: Timer/Counter1 Compare Match B output / PWM. |+| 14 | PD5/OC1A | bidirectional | Port D bit 5. Alt function: Timer/Counter1 Compare Match A output / PWM. |+| 15 | PD6/ICP1 | bidirectional | Port D bit 6. Alt function: Timer/Counter1 Input Capture. |+| 16 | PD7/OC2 | bidirectional | Port D bit 7. Alt function: Timer/Counter2 Compare Match output / PWM. |+| 17 | VCC | power_in | Digital supply voltage (2.7-5.5V). All VCC pins must be tied together. |+| 18 | GND | power_in | Digital ground. |+| 19 | PC0/SCL | bidirectional | Port C bit 0. Alt function: Two-Wire Serial Interface Clock. |+| 20 | PC1/SDA | bidirectional | Port C bit 1. Alt function: Two-Wire Serial Interface Data. |+| 21 | PC2/TCK | bidirectional | Port C bit 2. Alt function: JTAG Test Clock. Pull-up enabled when JTAG is active. |+| 22 | PC3/TMS | bidirectional | Port C bit 3. Alt function: JTAG Test Mode Select. Pull-up enabled when JTAG is active. |+| 23 | PC4/TDO | bidirectional | Port C bit 4. Alt function: JTAG Test Data Out. Tri-stated unless TAP is shifting data out. |+| 24 | PC5/TDI | bidirectional | Port C bit 5. Alt function: JTAG Test Data In. Pull-up enabled when JTAG is active. |+| 25 | PC6/TOSC1 | bidirectional | Port C bit 6. Alt function: Timer Oscillator pin 1 (async 32.768 kHz crystal for RTC). |+| 26 | PC7/TOSC2 | bidirectional | Port C bit 7. Alt function: Timer Oscillator pin 2 (async 32.768 kHz crystal for RTC). |+| 27 | AVCC | power_in | Analog supply voltage for Port A and the ADC. Must be connected to VCC (through an LC filter if ADC is used). |+| 28 | GND | power_in | Analog/digital ground. |+| 29 | AREF | input | Analog reference voltage input for the A/D Converter. |+| 30 | PA7/ADC7 | bidirectional | Port A bit 7. Alt function: ADC channel 7. |+| 31 | PA6/ADC6 | bidirectional | Port A bit 6. Alt function: ADC channel 6. |+| 32 | PA5/ADC5 | bidirectional | Port A bit 5. Alt function: ADC channel 5. |+| 33 | PA4/ADC4 | bidirectional | Port A bit 4. Alt function: ADC channel 4. |+| 34 | PA3/ADC3 | bidirectional | Port A bit 3. Alt function: ADC channel 3. |+| 35 | PA2/ADC2 | bidirectional | Port A bit 2. Alt function: ADC channel 2. |+| 36 | PA1/ADC1 | bidirectional | Port A bit 1. Alt function: ADC channel 1. |+| 37 | PA0/ADC0 | bidirectional | Port A bit 0. Alt function: ADC channel 0. |+| 38 | VCC | power_in | Digital supply voltage (2.7-5.5V). |+| 39 | GND | power_in | Digital ground. |+| 40 | PB0/XCK/T0 | bidirectional | Port B bit 0. Alt functions: USART External Clock (XCK) / Timer/Counter0 external counter input (T0). |+| 41 | PB1/T1 | bidirectional | Port B bit 1. Alt function: Timer/Counter1 external counter input (T1). |+| 42 | PB2/AIN0/INT2 | bidirectional | Port B bit 2. Alt functions: Analog Comparator positive input (AIN0) / External Interrupt 2. |+| 43 | PB3/AIN1/OC0 | bidirectional | Port B bit 3. Alt functions: Analog Comparator negative input (AIN1) / Timer/Counter0 Compare Match output (OC0). |+| 44 | PB4/SS | bidirectional | Port B bit 4. Alt function: SPI Slave Select (active low). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | TQFP-44(10x10) |+| Category | MCU |+| Pins | 44 |++## Ordering variants++- `ATMEGA32A-AUAU`+- `ATMEGA32A-AUAUR`+- `ATMEGA32A-AUMU`+- `ATMEGA32A-AUMUR`+- `ATMEGA32A-AUPU`++## CAD (KiCad official)++- Symbol: `ATMEGA32A-AU`+- Footprint: `Package_QFP:LQFP-44_10x10mm_P0.8mm`+- 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip datasheet](docs/atmega32a-au-datasheet.pdf) (18 pp, sha256 `683cd3f08e75f0c3`, retrieved 2026-08-17, tier: manufacturer)+- **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/atmega32a-au-datasheet.pdf)