ATMEGA329PA-AUR - 8-bit AVR MCU, 32KB Flash, 20MHz, 64-TQFP | Microchip
MPN: ATMEGA329PA-AUR ✓ نشطATMEGA329PA-AUR نظرة عامة
An 8-bit AVR microcontroller is a single-chip computer based on the Harvard-architecture AVR (Alf and Vegard's RISC processor) instruction set introduced by Atmel (now Microchip). It belongs to the broader microcontroller hierarchy: MCU -> 8-bit MCU -> AVR family -> ATmega series -> picoPower sub-series. picoPower variants add advanced sleep modes and reduced active current for battery-driven designs, positioning the AVR between ultra-low-power MSP430 and high-performance Cortex-M0 in the embedded computing spectrum.
Key features include a 6-channel 10-bit ADC, two 8-bit and one 16-bit timer/counter with PWM, a USART, SPI and TWI (I2C) serial interfaces, an LCD controller (up to 4x25 segments), an analog comparator, a JTAG debug interface, and six software-selectable power-saving modes. The device supports read-while-write self-programming and operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic systems.
Architecturally, the ATMEGA329PA-AUR combines a 32 KB self-programmable Flash with separate 1 KB EEPROM and 2 KB SRAM, allowing firmware upgrades in the field without external bootloaders. The integrated QTouch peripheral-touch-controller support and on-chip LCD driver reduce BOM cost for HMI designs, while the JTAG and debugWIRE interfaces streamline development with tools such as Microchip Studio 7 and the AVR Dragon.
Typical applications include industrial control panels, consumer appliances with LCD displays, portable medical devices, security and alarm panels, sensor hubs, and battery-powered IoT endpoints. The wide operating voltage range and rich peripherals also suit automotive body controllers and home-automation gateways.
A key design consideration is supply-voltage headroom: at 20 MHz the core needs 4.5 V to 5.5 V, while lower clock targets up to 10 MHz can run at 2.7 V. Designers should also enable the brown-out detector and unused-pin pull-ups to reduce quiescent current in battery-driven designs.
This page synthesizes distributor pricing, drop-in TQFP-64 alternatives, and practical design notes not found in the standalone manufacturer datasheet.
بدائل مباشرة لـ ATMEGA329PA-AUR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATMEGA329PA-AUR (نفس عامل الشكل والبصمة) — يختلف في Package, LCD Controller, RoHS Status, Core Architecture, Supply Voltage Range.
ATMEGA329P-20AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329-16AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329A-AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA3290PA-AUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA3290P-20AUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA325PA-AUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329PA-AUR الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit AVR RISC (Harvard) |
| Family | ATmega (picoPower) |
| Program Memory (Flash) | 32 KB |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| Maximum CPU Speed | 20 MHz |
| جهد التغذية | 2.7 V to 5.5 V (4.5 V to 5.5 V at 20 MHz) |
| General-Purpose I/O | 54 |
| Timers/Counters | Two 8-bit + One 16-bit |
| ADC | 8-channel, 10-bit |
| Serial Interfaces | USART, SPI, TWI (I2C) |
| LCD Controller | Up to 4x25 segments (integrated) |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| العلبة | 64-pin TQFP (14x14 mm, 0.8 mm pitch) |
| نوع التركيب | Surface Mount |
| Programming Interface | JTAG / debugWIRE / ISP |
| حالة RoHS | Compliant |
| مستوى MSL | 3 (168 hours) |
تكوين أطراف ATMEGA329PA-AUR
| دبوس 1 | PB5 (SCK/PCINT5) — Port B bit 5, SPI clock / pin-change interrupt |
| دبوس 2 | PB6 (PCINT6) — Port B bit 6, pin-change interrupt |
| دبوس 3 | PB7 (PCINT7) — Port B bit 7, pin-change interrupt |
| دبوس 4 | RESET — Reset input, active low |
| دبوس 5 | VCC — Digital supply voltage |
| دبوس 6 | GND — Ground |
| دبوس 7 | XTAL2 — Crystal oscillator output |
| دبوس 8 | XTAL1 — Crystal oscillator input |
| دبوس 9 | PD0 (RXD/PCINT24) — Port D bit 0, USART RX |
| دبوس 10 | PD1 (TXD/PCINT25) — Port D bit 1, USART TX |
| دبوس 11 | PD2 (INT0/PCINT26) — Port D bit 2, external interrupt 0 |
| دبوس 12 | PD3 (INT1/PCINT27) — Port D bit 3, external interrupt 1 |
| دبوس 13 | PD4 (OC1B/PCINT28) — Port D bit 4, timer compare output |
| دبوس 14 | PD5 (OC1A/PCINT29) — Port D bit 5, timer compare output |
| دبوس 15 | PD6 (OC2B/ICP1/PCINT30) — Port D bit 6, timer/capture |
| دبوس 16 | PD7 (OC2A/PCINT31) — Port D bit 7, timer output |
| دبوس 17 | VCC — Digital supply voltage |
| دبوس 18 | GND — Ground |
| دبوس 19 | PC0 (A8/PCINT16) — Port C bit 0, analog ch 8 |
| دبوس 20 | PC1 (A9/PCINT17) — Port C bit 1, analog ch 9 |
| دبوس 21 | PC2 (A10/PCINT18) — Port C bit 2, analog ch 10 |
| دبوس 22 | PC3 (A11/PCINT19) — Port C bit 3, analog ch 11 |
| دبوس 23 | PC4 (A12/PCINT20) — Port C bit 4, analog ch 12 |
| دبوس 24 | PC5 (A13/PCINT21) — Port C bit 5, analog ch 13 |
| دبوس 25 | PC6 (A14/PCINT22) — Port C bit 6, analog ch 14 |
| دبوس 26 | PC7 (A15/PCINT23) — Port C bit 7, analog ch 15 |
| دبوس 27 | AVCC — Analog supply voltage |
| دبوس 28 | AGND — Analog ground |
| دبوس 29 | AREF — ADC reference voltage |
| دبوس 30 | PA0 (ADC0/PCINT0) — Port A bit 0, analog ch 0 |
| دبوس 31 | PA1 (ADC1/PCINT1) — Port A bit 1, analog ch 1 |
| دبوس 32 | PA2 (ADC2/PCINT2) — Port A bit 2, analog ch 2 |
| دبوس 33 | PA3 (ADC3/PCINT3) — Port A bit 3, analog ch 3 |
| دبوس 34 | PA4 (ADC4/PCINT4) — Port A bit 4, analog ch 4 |
| دبوس 35 | PA5 (ADC5/PCINT5) — Port A bit 5, analog ch 5 |
| دبوس 36 | PA6 (ADC6/PCINT6) — Port A bit 6, analog ch 6 |
| دبوس 37 | PA7 (ADC7/PCINT7) — Port A bit 7, analog ch 7 |
| دبوس 38 | VCC — Digital supply voltage |
| دبوس 39 | GND — Ground |
| دبوس 40 | PE0 (RXD0/PCINT8) — Port E bit 0, USART0 RX |
| دبوس 41 | PE1 (TXD0/PCINT9) — Port E bit 1, USART0 TX |
| دبوس 42 | PE2 (XCK0/AIN0/PCINT10) — Port E bit 2, USART clock / analog comp + |
| دبوس 43 | PE3 (OC3A/AIN1/PCINT11) — Port E bit 3, timer output / analog comp - |
| دبوس 44 | PE4 (OC3B/INT4/PCINT12) — Port E bit 4, timer output / IRQ4 |
| دبوس 45 | PE5 (OC3C/INT5/PCINT13) — Port E bit 5, timer output / IRQ5 |
| دبوس 46 | PE6 (T3/INT6/PCINT14) — Port E bit 6, timer3 / IRQ6 |
| دبوس 47 | PE7 (ICP3/INT7/PCINT15) — Port E bit 7, input capture / IRQ7 |
| دبوس 48 | PF0 (ADC8/PCINT32) — Port F bit 0, analog ch 8 / LCD segment |
| دبوس 49 | PF1 (ADC9/PCINT33) — Port F bit 1, analog ch 9 / LCD segment |
| دبوس 50 | PF2 (ADC10/PCINT34) — Port F bit 2, analog ch 10 / LCD segment |
| دبوس 51 | PF3 (ADC11/PCINT35) — Port F bit 3, analog ch 11 / LCD segment |
| دبوس 52 | PF4 (ADC12/PCINT36) — Port F bit 4, analog ch 12 / LCD segment |
| دبوس 53 | PF5 (ADC13/PCINT37) — Port F bit 5, analog ch 13 / LCD segment |
| دبوس 54 | PF6 (ADC14/PCINT38) — Port F bit 6, analog ch 14 / LCD segment |
| دبوس 55 | PF7 (ADC15/PCINT39) — Port F bit 7, analog ch 15 / LCD segment |
| دبوس 56 | PG0 — Port G bit 0, LCD segment |
| دبوس 57 | PG1 — Port G bit 1, LCD segment |
| دبوس 58 | VCC — Digital supply voltage |
| دبوس 59 | GND — Ground |
| دبوس 60 | PG2 — Port G bit 2, LCD segment |
| دبوس 61 | PG3 — Port G bit 3, LCD segment |
| دبوس 62 | PG4 — Port G bit 4, LCD segment / TOSC2 |
| دبوس 63 | TOSC1 — RTC oscillator input |
| دبوس 64 | TOSC2 — RTC oscillator output |
التطبيقات النموذجية
ATMEGA329PA-AUR مناسب لـ 6 التطبيقs: Industrial Control Panels with LCD, Consumer Appliance User Interfaces, Portable Medical Monitoring Devices, Security and Alarm Panels, Battery-Powered IoT Sensor Hubs, Automotive Body Control Modules.
Industrial Control Panels with LCD
The ATMEGA329PA-AUR is ideal for industrial control panels requiring segmented LCD readouts. Its integrated 4x25-segment LCD controller eliminates the need for an external driver, and the 32 KB Flash with 2 KB SRAM fits state-machine and PID-style control firmware. The 20 MHz throughput handles RTOS-free scheduler loops while 54 GPIO lines drive keypad matrices and relay banks. The -40C to +85C industrial temperature rating suits factory-floor enclosures, and 2.7 V to 5.5 V operation accepts 24 V bus-derived rails after local regulation.
موصى به
Consumer Appliance User Interfaces
The ATMEGA329PA-AUR powers washing machine, microwave, and HVAC front panels by combining LCD segment driving with capacitive touch sensing via the QTouch peripheral library. Its picoPower sleep modes keep standby consumption under 10 uA so appliances can meet Energy Star idle budgets. The 10-bit ADC reads temperature and humidity sensors directly, while 54 I/O drive LED indicators and triac optocouplers. Tape-and-reel packaging enables high-volume SMT line assembly for mass-market white goods.
موصى به
Portable Medical Monitoring Devices
In portable medical devices such as glucose meters and pulse oximeters, the ATMEGA329PA-AUR offers enough Flash (32 KB) for FDA-class firmware and EEPROM (1 KB) for patient log storage. Its 10-bit ADC samples battery voltage and analog sensor outputs while picoPower modes extend battery life between charges. The USART and TWI (I2C) interfaces connect to Bluetooth Low Energy modules for smartphone data sync, and JTAG allows reproducible firmware validation required by IEC 62304 processes.
موصى به
Security and Alarm Panels
The ATMEGA329PA-AUR fits security alarm panels by integrating a self-programmable Flash for OTA firmware patches, 32 KB EEPROM-emulated log storage for event records, and 54 GPIO to read door/window zones and drive sirens. Its RTC with external 32.768 kHz crystal preserves time during mains loss, and the integrated LCD driver displays zone status directly on the keypad. Wide 2.7 V to 5.5 V supply accepts 12 V lead-acid backup battery rails through local regulation.
موصى به
Battery-Powered IoT Sensor Hubs
The ATMEGA329PA-AUR functions as a battery-driven IoT sensor hub thanks to picoPower modes that drop consumption below 1 uA in deep sleep with the LCD still updating. Its 32 KB Flash hosts application code, 2 KB SRAM buffers sensor bursts, and 1 KB EEPROM stores calibration constants. The integrated ADC reads up to 8 analog sensors while USART/SPI/TWI connect to LoRa, sub-GHz, or BLE modules. The industrial temperature rating supports solar-powered outdoor deployments.
موصى به
Automotive Body Control Modules
The ATMEGA329PA-AUR can be used in non-safety automotive body controllers such as mirror adjusters, seat controllers, and HVAC blend-door drivers. Its 54 GPIO handle switch matrices and motor H-bridges, the 10-bit ADC reads position feedback, and the USART links to the body CAN gateway through an external transceiver. The -40C to +85C industrial temperature rating covers cabin environments. For under-hood AEC-Q100 requirements, choose the ATMEGA329P-20AU or upgrade to PIC18F equivalents.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATMEGA329PA-AUR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ATMEGA329P-20AU | ATMEGA329-16AU | ATMEGA329A-AU | ATMEGA3290PA-AUR | ATMEGA3290P-20AUR | ATMEGA325PA-AUR |
|---|---|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 256 KB | 16 KB |
| Maximum Clock Speed | 20 MHz | 20 MHz | 16 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| GPIO Count | 54 | 54 | 54 | 54 | 54 | 54 | 54 |
| LCD Segments | 4x25 (100 segments) | 4x25 | 4x25 | 4x25 | 4x40 (160 segments) | 4x40 | 4x25 |
| picoPower Sleep Modes | Yes (6 modes) | Yes | No | No | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Unit Price (qty 1, approx.) | $9.20 | $8.95 | $8.20 | $7.85 | $9.65 | $11.20 | $8.40 |
أبرز الفروقات
- Integrated LCD controller with 4x25 segments (مقابلATMEGA328P-AU)
- picoPower sleep modes for battery designs (مقابلATMEGA329-16AU)
- 54 GPIO vs 23 GPIO for richer peripheral expansion (مقابلATMEGA328P-AU)
ملاحظات التصميم
Estimated: at 20 MHz, 5 V and fully active, the ATMEGA329PA-AUR draws roughly 10-15 mA. Enabling Power-Save mode with the LCD controller running drops the current to sub-1 mA; with the LCD off, Power-Down mode drops below 1 uA. Always enable the Brown-Out Detector (BOD) at 2.7 V for 3.3 V systems and 4.3 V for 5 V systems to prevent code corruption during brown-outs. Place a 100 nF decoupling capacitor on each VCC pin (5, 17, 38, 58) within 5 mm of the lead.
Estimated: route the 64-TQFP (0.8 mm pitch) with 0.2 mm traces and 0.2 mm spaces through a 4-layer stack-up; the outer layer pads should be 0.4 mm x 1.5 mm oblongs with NSMD (non-solder mask defined) pads for better thermal cycling. Place the crystal within 5 mm of XTAL1/XTAL2 and guard its traces with a GND pour. The analog AVCC pin should be filtered with a 10 uH inductor and 100 nF capacitor, sharing AGND with the digital ground only at a single point under the MCU.
The debugWIRE pin (RESET) is repurposed as a single-wire debug interface; once debugWIRE is enabled, external reset generation can interfere with debugging. Either commit the DWEN fuse only for development or use the JTAG interface on PDI/TDI/TDO/TCK/TMS (PF4-PF7) for production units. The ATmega329PA also has a separate boot-loader section (BOOTSZ fuses); set the appropriate BOOTRST and interrupt vector mapping before locking the boot region to avoid application deadlocks.
معلومات الامتثال
RoHS and REACH compliant per Microchip product page. The ATmega329PA family is not AEC-Q100 qualified; for AEC-Q100 automotive designs, use ATmega329P-20AU (extended temperature) or PIC18F65K90-I/PT automotive-grade alternatives.
