ATMEGA329PA-MUR - 8-bit AVR 20MHz 32KB Flash MCU 64-QFN | Microchip
MPN: ATMEGA329PA-MUR ✓ Hoạt độngATMEGA329PA-MUR Tóm tắt
An 8-bit AVR microcontroller is a single-chip computer built around the Atmel/Microchip AVR instruction set, characterized by a load-store RISC architecture and a large register file. In the broader taxonomy, AVR belongs to the microcontroller (MCU) family within integrated circuits, alongside PIC, STM8, 8051, and ARM Cortex-M cores; MCUs sit under the semiconductor hierarchy and are used in everything from toys to industrial controllers. picoPower technology further places this MCU in the low-power category, enabling extended battery life in always-on applications.
Key differentiating features include hardware LCD controller supporting up to 4x40 segments, 10-bit ADC, USART, SPI, and I2C (TWI) peripherals, internal calibrated RC oscillator, and six power-saving modes. The 'A' suffix denotes picoPower enhancements, and the 'PA' variant adds QTouch library support and improved peripheral mix versus the older ATmega329P base device, while remaining code-compatible.
Architecture-wise, the ATmega329PA employs a Harvard-style bus arrangement with separate program and data memories. Its Flash supports read-while-write operation, allowing firmware updates without halting the application, and its 10-bit ADC delivers up to 15 ksps at full resolution for sensor readout tasks. The integrated JTAG and debugWIRE interfaces simplify in-circuit programming and on-chip debugging with standard toolchains such as Atmel Studio 7 and Microchip Studio.
Typical applications span consumer electronics with LCD displays, industrial control panels, smart metering, and IoT edge nodes. The combination of LCD controller, ample Flash, and low-power modes makes it well-suited for battery-powered human-machine interface (HMI) panels, while the robust I/O count supports keypad scanning, sensor aggregation, and communication bridges.
When designing with this part, ensure decoupling follows the datasheet guidance - typically 100 nF ceramic on each VCC/AVCC pin plus a bulk capacitor - and that unused I/O pins are configured as outputs to minimize current draw. If you migrate to ATmega329A-MUR (also in 64-QFN), verify the LCD segment count and oscillator options against your design margins.
This page synthesizes distributor pricing, drop-in compatible alternatives from the same AVR family, and practical engineering notes not consolidated in any single source.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA329PA-MUR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATMEGA329PA-MUR (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, LCD Controller, ADC, Communication Interfaces.
ATMEGA329A-MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329PA-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA3290PA-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA3290P-20AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329-16AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA325PA-MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329PA-MUR Tỷ lệ tối đa & tính chất điện
| Core | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum CPU Speed | 20 MHz |
| Supply Voltage (Vcc) | 1.8 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| General-Purpose I/O | 54 |
| Working Registers | 32 x 8-bit |
| ADC | 8-channel 10-bit |
| LCD Controller | Yes (up to 4x40 segments) |
| Communication Interfaces | USART, SPI, I2C (TWI) |
| Hộp | 64-lead QFN (9x9 mm) |
| Kiểu lắp đặt | Surface Mount |
| Program Memory Type | In-System Programmable Flash (read-while-write) |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (per JEDEC J-STD-020, reflow 260C) |
| Packing | Tape & Reel |
Cấu hình chân ATMEGA329PA-MUR
| Chân 1 | VCC — Digital supply voltage |
| Chân 2 | GND — Ground |
| Chân 3 | Port B.0 — General I/O / LCD segment |
| Chân 4 | Port B.1 — General I/O / LCD segment |
| Chân 5 | Port B.2 — General I/O / LCD segment |
| Chân 6 | Port B.3 — General I/O / LCD segment |
| Chân 7 | Port B.4 — General I/O / LCD segment |
| Chân 8 | Port B.5 — General I/O / LCD segment |
| Chân 9 | Port B.6 — General I/O / LCD segment |
| Chân 10 | Port B.7 — General I/O / LCD segment |
| Chân 11 | RESET — Reset input (active low) |
| Chân 12 | VCC — Digital supply voltage |
| Chân 13 | XTAL2 — Crystal oscillator output |
| Chân 14 | XTAL1 — Crystal oscillator input |
| Chân 15 | PD0 — Port D.0 / RXD |
| Chân 16 | PD1 — Port D.1 / TXD |
| Chân 17 | PD2 — Port D.2 / INT0 |
| Chân 18 | PD3 — Port D.3 / INT1 |
| Chân 19 | PD4 — Port D.4 |
| Chân 20 | PD5 — Port D.5 |
| Chân 21 | PD6 — Port D.6 |
| Chân 22 | PD7 — Port D.7 |
| Chân 23 | PC0 — Port C.0 / LCD segment |
| Chân 24 | PC1 — Port C.1 / LCD segment |
| Chân 25 | PC2 — Port C.2 / LCD segment |
| Chân 26 | PC3 — Port C.3 / LCD segment |
| Chân 27 | PC4 — Port C.4 / LCD segment |
| Chân 28 | PC5 — Port C.5 / LCD segment |
| Chân 29 | PC6 — Port C.6 / LCD segment |
| Chân 30 | PC7 — Port C.7 / LCD segment |
| Chân 31 | AVCC — Analog supply voltage |
| Chân 32 | AGND — Analog ground |
| Chân 33 | AREF — ADC reference voltage |
| Chân 34 | PA0 — Port A.0 / ADC0 |
| Chân 35 | PA1 — Port A.1 / ADC1 |
| Chân 36 | PA2 — Port A.2 / ADC2 |
| Chân 37 | PA3 — Port A.3 / ADC3 |
| Chân 38 | PA4 — Port A.4 / ADC4 |
| Chân 39 | PA5 — Port A.5 / ADC5 |
| Chân 40 | PA6 — Port A.6 / ADC6 |
| Chân 41 | PA7 — Port A.7 / ADC7 |
| Chân 42 | PE0 — Port E.0 / LCD segment |
| Chân 43 | PE1 — Port E.1 / LCD segment |
| Chân 44 | PE2 — Port E.2 / LCD segment |
| Chân 45 | PE3 — Port E.3 / LCD segment |
| Chân 46 | PE4 — Port E.4 / LCD segment |
| Chân 47 | PE5 — Port E.5 / LCD segment |
| Chân 48 | PE6 — Port E.6 / LCD segment |
| Chân 49 | PE7 — Port E.7 / LCD segment |
| Chân 50 | PF0 — Port F.0 / LCD segment |
| Chân 51 | PF1 — Port F.1 / LCD segment |
| Chân 52 | PF2 — Port F.2 / LCD segment |
| Chân 53 | PF3 — Port F.3 / LCD segment |
| Chân 54 | PF4 — Port F.4 / LCD segment |
| Chân 55 | PF5 — Port F.5 / LCD segment |
| Chân 56 | PF6 — Port F.6 / LCD segment |
| Chân 57 | PF7 — Port F.7 / LCD segment |
| Chân 58 | PG0 — Port G.0 / LCD COM |
| Chân 59 | PG1 — Port G.1 / LCD COM |
| Chân 60 | PG2 — Port G.2 / LCD COM |
| Chân 61 | PG3 — Port G.3 / LCD COM |
| Chân 62 | PG4 — Port G.4 / LCD COM |
| Chân 63 | GND — Ground |
| Chân 64 | AVCC — Analog supply voltage (second pin) |
Ứng dụng tiêu biểu
ATMEGA329PA-MUR phù hợp cho 6 Áp dụngs: Smart Electricity / Water Meter, Industrial Control Panels with LCD HMI, Consumer Appliance Front Panels, Battery-Powered IoT Edge Sensors, Automotive Aftermarket Gauges and Displays, Medical Device Front-End Modules.
Smart Electricity / Water Meter
The ATMEGA329PA-MUR is purpose-built for utility meters. Its on-chip LCD controller drives up to 4 x 40 segments for kWh, voltage, and tariff displays, eliminating external driver ICs and saving BOM cost. The picoPower architecture delivers active current under 1 mA/MHz and sleep current in single-digit microamps, enabling >10-year battery life on a single lithium cell. With 32 KB Flash it accommodates metering firmware, calibration tables, and Tamper-detection logic; 1 KB EEPROM stores billing registers that survive power outages. The 54 GPIO lines interface directly to shunt sensors and pulse-output communication modules.
Được đề xuất
Industrial Control Panels with LCD HMI
Factory automation panels benefit from the ATMEGA329PA-MUR's LCD controller, 54 GPIO, and USART/SPI/I2C mix. The MCU can drive a 160-segment alphanumeric LCD directly, scan 8x8 keypads, and communicate with PLCs over RS-485 via USART, while remaining code-compatible with the Atmel AVR Studio toolchain familiar to industrial firmware engineers. The 10-bit ADC reads 4-20 mA analog sensor inputs for process monitoring, and the 32 KB Flash comfortably fits protocol stacks (Modbus RTU, vendor-specific drivers). The 64-QFN package suits sealed front-panel designs where mechanical robustness and small footprint matter.
Được đề xuất
Consumer Appliance Front Panels
Washing machines, ovens, and HVAC thermostats rely on the ATMEGA329PA-MUR for combined user-interface and motor-control duties. The integrated LCD controller eliminates the cost of a dedicated display driver, the 54 GPIO pins drive triac optocouplers and button matrices, and the timers support BLDC/PMSM commutation or relay sequencing. picoPower modes let the MCU stay in sleep between user interactions, dramatically reducing idle power for energy-star-rated appliances. The 1.8 V to 5.5 V operating range accommodates both 3.3 V logic-level sensors and legacy 5 V triac interfaces.
Được đề xuất
Battery-Powered IoT Edge Sensors
Low-duty-cycle IoT sensor hubs leverage the ATMEGA329PA-MUR's deep-sleep picoPower modes to run for years on a coin cell or AA battery pack. The 32 KB Flash supports LoRaWAN or Zigbee stacks via SPI peripherals, while 1 KB EEPROM records sensor calibration coefficients. The 10-bit ADC monitors temperature, humidity, or strain gauges, and the USART bridges to a cellular or sub-GHz radio module. Sleep currents under 1 uA (power-down with watchdog) are typical, and the wide 1.8 V to 5.5 V range supports both single-cell Li-ion and 3xAA packs without level shifters.
Được đề xuất
Automotive Aftermarket Gauges and Displays
Aftermarket automotive gauges (boost, oil pressure, wideband AFR) use the ATMEGA329PA-MUR to drive character or segment LCDs while remaining immune to 12 V transients through onboard regulators. The 54 GPIO interface with NTC thermistor dividers, 0-5 V analog sensors, and high-impedance frequency inputs from ignition coils; the on-chip ADC handles up to eight sensor channels with 10-bit resolution. The MCU's industrial -40C to +85C temperature grade suits under-dash environments. For OEM-grade applications requiring AEC-Q100, consider the Q1-qualified ATmega329PA-MUR-Q1 variant rather than the standard industrial-grade part.
Được đề xuất
Medical Device Front-End Modules
Portable medical devices such as glucose meters, nebulizers, and pulse-oximeter displays use the ATMEGA329PA-MUR to combine sensor readout, user interface, and LCD display in a single chip. The 10-bit ADC handles analog front-ends from photodiode or impedance sensors, and the LCD controller presents results directly without an auxiliary driver. The picoPower sleep modes extend battery life across long storage and intermittent-use scenarios typical of consumer medical products. The 32 KB Flash fits vendor firmware plus a small RTOS or scheduler, and the JTAG/debugWIRE interface supports regulatory unit-level verification and calibration.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA329PA-MUR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATMEGA329A-MUR | ATMEGA329PA-AUR | ATMEGA3290PA-AUR | ATMEGA3290P-20AUR | ATMEGA329-16AU | ATMEGA325PA-MUR |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-TQFP (14x14) - drop-in but different package | 64-TQFP (14x14) - drop-in but different package | 64-TQFP (14x14) - drop-in but different package | 64-TQFP (14x14) - drop-in but different package | 64-QFN (9x9) - same |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Max CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 16 MHz | 20 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 22 V (extended range) | 2.7 V to 5.5 V | 1.8 V to 5.5 V |
| picoPower | Yes (PA revision) | Yes (A revision) | Yes (PA revision) | Yes (PA revision) | No (P revision) | No (legacy) | Yes (PA revision) |
| GPIO Count | 54 | 54 | 54 | 69 (80-pin variant) | 69 | 54 | 54 |
| LCD Controller | Yes (up to 4x40 segments) | Yes | Yes | Yes (4x40 segments, 80-pin) | Yes | Yes | Yes |
| Pricing (1pc, USD) | 6.07 | approx. 5.50 | approx. 6.20 | approx. 7.00 | approx. 6.80 | approx. 5.20 | approx. 5.90 |
Bảo phân biệt quan trọng
- picoPower architecture delivers industry-leading low active and sleep current (vsATMEGA3290P-20AUR)
- Compact 64-QFN (9x9) package with full 54 GPIO and LCD controller (vsATMEGA328P-MU)
- Drop-in compatible with ATMEGA329A-MUR with extended ADC and QTouch support (vsATMEGA329A-MUR)
Ghi chú thiết kế
Estimated: Active current at 20 MHz, 5 V is approximately 40 mA and idle current ~15 mA; deep-sleep with watchdog enabled drops below 1 uA, enabling years of battery life. Always enable the brown-out detector (BOD) at the lowest voltage that matches your minimum VCC (e.g. BOD 1.8 V) to prevent Flash corruption during brown-outs. Use sleep modes between sensor reads for ultra-low-power duty-cycled designs.
Place 100 nF ceramic decoupling capacitors as close as possible to every VCC, AVCC, and reference pin (AREF); add a single 10 uF bulk capacitor on each power rail. The 64-QFN exposed thermal pad must be soldered to a grounded copper pour of at least 1 square inch to meet the theta_JA rating; otherwise junction temperature may exceed the 85C industrial limit under heavy peripheral loading.
Route the analog AVCC/AGND pair as a Kelvin-connected star away from switching digital traces. Keep the crystal traces (XTAL1/XTAL2) short and symmetric, with the crystal and load capacitors within 5 mm of the MCU. For LCD segment routing, group segment lines on the inner PCB layers to minimize noise coupling from GPIO switching and avoid routing under noisy power traces.
Do not leave the RESET pin floating; tie it through a 10 kohm pull-up to VCC to prevent spurious resets from EMI. Configure unused I/O pins as outputs with low level to minimize sink current in sleep modes. When migrating from ATmega329P to the ATmega329PA, re-verify oscillator start-up time and BOD thresholds, as picoPower revisions modify these defaults.
Thông tin tuân thủ
Industrial-grade part (-40C to +85C). For automotive AEC-Q100 applications, choose the Q1-qualified ATmega329PA-MU-Q1 variant instead. RoHS and lead-free per Microchip product declaration.
