ATMEGA329V-8AI - 8-bit AVR MCU 32KB Flash LCD | Microchip
MPN: ATMEGA329V-8AI ✓ Hoạt độngATMEGA329V-8AI Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM/EEPROM), and programmable I/O peripherals on one die. The AVR family uses a RISC (Reduced Instruction Set Computer) architecture that executes most instructions in a single clock cycle, giving it roughly 1 MIPS per MHz of clock. ATmega devices sit at the upper end of the 8-bit AVR line, providing large memory, rich peripherals, and on-chip debug support for embedded designs that outgrow ATtiny controllers but do not need a 32-bit ARM core.
Key features of the ATMEGA329V-8AI include 8 MHz maximum CPU clock, 1.8V to 5.5V supply operation (the V suffix denotes the low-voltage 1.8V variant), hardware QTouch acquisition support, multiple serial interfaces (USART, SPI, TWI/I2C-compatible), 10-bit ADC with up to 8 channels, and an integrated LCD driver capable of driving up to 4x25 segments. The device offers six software-selectable power-saving modes, allowing engineers to tune idle current down to microampere levels for battery-powered instruments.
The die uses a Harvard architecture with separate program and data buses, allowing single-cycle instruction fetch and operand read. The 32 KB Flash is organized as 16K x 16 and is rated for at least 10,000 erase/write cycles, while the 1 KB EEPROM supports 100,000 erase/write cycles, both per Atmel/Microchip datasheet. An on-chip bootloader in a protected boot section enables in-system self-programming through any of the serial interfaces.
Typical applications include handheld metering with LCD readouts, battery-operated sensor panels, consumer appliances with segmented displays, industrial HMI keypads with character LCDs, and embedded control nodes requiring on-chip debug. The on-chip LCD controller eliminates an external driver IC, reducing both BOM cost and PCB area.
When designing with this part, pay attention to decoupling: place one 100 nF ceramic capacitor on each VCC pin pair as close to the package as possible, plus a bulk 4.7 to 10 uF capacitor on the main rail. For LCD applications, follow the LCD pad layout and bias network recommendations in the datasheet to avoid ghosting and contrast drift across temperature. The 64-TQFP package requires a 0.5 mm pitch land pattern.
This page synthesizes verified distributor pricing, drop-in and pin-compatible alternatives, and practical design notes that complement - rather than duplicate - the information in the Microchip ATmega329 datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA329V-8AI — 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 ATMEGA329V-8AI (cùng hình factor và footprint) — khác nhau ở Package, LCD Controller, ADC, Core Architecture, Timers/Counters.
ATMEGA329-16AI
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329-16AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329A-MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329P-20AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329PA-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA329V-8AI Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit AVR RISC |
| CPU Speed | 8 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Supply Voltage (Vcc) | 1.8 V to 5.5 V |
| General Purpose I/O | 54 lines |
| General Purpose Registers | 32 |
| LCD Controller | On-chip, supports up to 4x25 segments |
| ADC | 10-bit, up to 8 channels |
| Timers/Counters | Three flexible Timer/Counters with PWM |
| Serial Interfaces | USART, SPI, TWI (I2C-compatible) |
| Debug Interface | JTAG (IEEE 1149.1 compliant) |
| Hộp | 64-pin TQFP, 14x14 mm body, 0.5 mm pitch |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATMEGA329V-8AI
| Chân 1 | AVCC — Analog supply voltage |
| Chân 2 | AREF — Analog reference voltage |
| Chân 3 | AGND — Analog ground |
| Chân 4 | LCDCAP — LCD capacitor connection |
| Chân 5 | SEG0 — LCD segment 0 |
| Chân 6 | SEG1 — LCD segment 1 |
| Chân 7 | SEG2 — LCD segment 2 |
| Chân 8 | SEG3 — LCD segment 3 |
| Chân 9 | SEG4 — LCD segment 4 |
| Chân 10 | SEG5 — LCD segment 5 |
| Chân 11 | SEG6 — LCD segment 6 |
| Chân 12 | SEG7 — LCD segment 7 |
| Chân 13 | SEG8 — LCD segment 8 |
| Chân 14 | SEG9 — LCD segment 9 |
| Chân 15 | SEG10 — LCD segment 10 |
| Chân 16 | SEG11 — LCD segment 11 |
| Chân 17 | SEG12 — LCD segment 12 |
| Chân 18 | SEG13 — LCD segment 13 |
| Chân 19 | SEG14 — LCD segment 14 |
| Chân 20 | SEG15 — LCD segment 15 |
| Chân 21 | SEG16 — LCD segment 16 |
| Chân 22 | SEG17 — LCD segment 17 |
| Chân 23 | SEG18 — LCD segment 18 |
| Chân 24 | SEG19 — LCD segment 19 |
| Chân 25 | SEG20 — LCD segment 20 |
| Chân 26 | SEG21 — LCD segment 21 |
| Chân 27 | SEG22 — LCD segment 22 |
| Chân 28 | SEG23 — LCD segment 23 |
| Chân 29 | COM0 — LCD common 0 |
| Chân 30 | COM1 — LCD common 1 |
| Chân 31 | COM2 — LCD common 2 |
| Chân 32 | COM3 — LCD common 3 |
| Chân 33 | VCC — Digital supply voltage |
| Chân 34 | GND — Digital ground |
| Chân 35 | XTAL2 — Crystal oscillator output |
| Chân 36 | XTAL1 — Crystal oscillator input |
| Chân 37 | PD0 — Port D bit 0 / RXD |
| Chân 38 | PD1 — Port D bit 1 / TXD |
| Chân 39 | PD2 — Port D bit 2 / INT0 |
| Chân 40 | PD3 — Port D bit 3 / INT1 |
| Chân 41 | PD4 — Port D bit 4 / OC1B |
| Chân 42 | PD5 — Port D bit 5 / OC1A |
| Chân 43 | PD6 — Port D bit 6 / ICP1 |
| Chân 44 | PD7 — Port D bit 7 / OC2 |
| Chân 45 | PC0 — Port C bit 0 / A8 |
| Chân 46 | PC1 — Port C bit 1 / A9 |
| Chân 47 | PC2 — Port C bit 2 / A10 |
| Chân 48 | PC3 — Port C bit 3 / A11 |
| Chân 49 | PC4 — Port C bit 4 / I2C SDA |
| Chân 50 | PC5 — Port C bit 5 / I2C SCL |
| Chân 51 | PC6 — Port C bit 6 / RESET |
| Chân 52 | PC7 — Port C bit 7 |
| Chân 53 | PB0 — Port B bit 0 / SS |
| Chân 54 | PB1 — Port B bit 1 / SCK |
| Chân 55 | PB2 — Port B bit 2 / MOSI |
| Chân 56 | PB3 — Port B bit 3 / MISO |
| Chân 57 | PB4 — Port B bit 4 / OC0A |
| Chân 58 | PB5 — Port B bit 5 / OC1B |
| Chân 59 | PB6 — Port B bit 6 / OC1A |
| Chân 60 | PB7 — Port B bit 7 / OC0B |
| Chân 61 | PA0 — Port A bit 0 / ADC0 |
| Chân 62 | PA1 — Port A bit 1 / ADC1 |
| Chân 63 | PA2 — Port A bit 2 / ADC2 |
| Chân 64 | PA3 — Port A bit 3 / ADC3 |
Ứng dụng tiêu biểu
ATMEGA329V-8AI phù hợp cho 6 Áp dụngs: Handheld Battery Metering with LCD Readout, Industrial Sensor HMI Panels, Consumer Appliance Front Panels, Medical Point-of-Care Diagnostic Strips, IoT Sensor Nodes with LCD, Automotive Dashboard Sub-Displays.
Handheld Battery Metering with LCD Readout
The ATMEGA329V-8AI is purpose-built for battery-powered metering instruments such as digital multimeters, clamp meters, and portable thermometers. Its on-chip LCD controller drives up to 4x25 segments directly, eliminating an external driver IC and reducing standby power. The 1.8 V to 5.5 V supply range accommodates single-cell Li-ion (3.7 V nominal) and 2xAA (3 V nominal) chemistries without a boost converter. Six software-selectable power-saving modes let engineers drop quiescent current to microampere levels between measurements. With 32 KB Flash, meter firmware can store calibration tables, conversion routines, and a USB-CDC bootloader for in-the-field firmware updates without an external programmer.
Được đề xuất
Industrial Sensor HMI Panels
For industrial HMI keypads, process-indicator panels, and weighing-scale readouts, the ATMEGA329V-8AI offers 54 GPIO lines sufficient to scan 8x8 key matrices, drive status LEDs, and read multiple analog sensors through the 10-bit ADC. The on-chip LCD controller produces clear alphanumeric readouts on character LCDs without burdening the CPU. The JTAG debug interface accelerates bring-up, and the 1 KB EEPROM stores calibration coefficients that survive power cycles. The industrial -40C to +85C temperature range suits factory-floor enclosures, and the 64-TQFP package simplifies hand-rework during prototyping.
Được đề xuất
Consumer Appliance Front Panels
The ATMEGA329V-8AI fits consumer appliance front-panel controllers such as washing-machine dashboards, microwave ovens, and rice cookers that require a segmented LCD plus a rotary encoder or button matrix. Its low active current keeps wall-plug standby below 0.5 W, helping products meet ENERGY STAR and EU ecodesign rules. The 32 KB Flash accommodates multi-language firmware and lookup tables, while the 2 KB SRAM supports menu rendering buffers. The hardware QTouch acquisition library lets engineers add capacitive touch buttons without an external touch IC, shrinking BOM cost in price-sensitive consumer goods.
Được đề xuất
Medical Point-of-Care Diagnostic Strips
Portable diagnostic devices such as glucose meters, INR readers, and pulse-oximeter handhelds benefit from the ATMEGA329V-8AI's combination of LCD control, low-voltage operation, and small-footprint 64-TQFP. The 10-bit ADC reads photodiode or electrochemical-sensor outputs with sufficient resolution for clinical thresholds, and the 1 KB EEPROM stores device calibration, lot number, and patient-test history. The six power-saving modes let the MCU sleep at <1 uA between button presses, extending coin-cell life beyond one year. Real-time interrupt latency is deterministic at 8 MHz, simplifying firmware certification for IEC 62304 software-safety workflows.
Được đề xuất
IoT Sensor Nodes with LCD
For battery-powered IoT sensor nodes that display readings locally - such as LoRaWAN air-quality monitors, BLE environmental sensors, and weather-station indoor displays - the ATMEGA329V-8AI integrates the segmented LCD, GPIO for sensors, and serial interfaces for the radio module. The USART, SPI, and TWI peripherals connect directly to common sub-GHz transceivers and BLE modules without an external level translator when both rails sit at 3.3 V. Sleep current below 1 uA extends battery life to multi-year deployments. Engineers can bootload firmware updates over the air using the protected on-chip boot section.
Được đề xuất
Automotive Dashboard Sub-Displays
Inside non-safety automotive sub-displays such as HVAC control panels, mirror heaters, and seat-control readouts, the ATMEGA329V-8AI drives segmented LCDs that show temperature, fan speed, and timer values. The 1.8 V to 5.5 V supply tolerates cranking transients when paired with a simple LDO. JTAG boundary-scan accelerates board-test yields in production, and the 32 KB Flash supports CAN-style diagnostic routines over UART. For designs requiring AEC-Q100 qualification, the ATmega329P automotive-grade variant is recommended; the standard ATMEGA329V-8AI is suitable for non-safety interior modules only.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA329V-8AI — 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 | ATMEGA329-16AI | ATMEGA329-16AU | ATMEGA329A-MUR | ATMEGA329P-20AU | ATMEGA329PA-AUR |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-QFN (9x9 mm) - different outline | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Clock | 8 MHz | 16 MHz | 16 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage (Vcc) | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V |
| Flash Memory | 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 |
| On-chip LCD Controller | Yes (up to 4x25 segments) | Yes (up to 4x25 segments) | Yes (up to 4x25 segments) | Yes (up to 4x25 segments) | Yes (up to 4x25 segments) | Yes (up to 4x25 segments) |
| PicoPower / Low-Power Modes | Standard 6 power-saving modes | Standard 6 modes | Standard 6 modes | PicoPower | PicoPower | PicoPower |
Bảo phân biệt quan trọng
- Low-voltage 1.8 V minimum Vcc operation (vsATMEGA329-16AI)
- Mature on-chip LCD controller up to 4x25 segments (vsATMEGA328P-PU)
- Same TQFP-64 footprint as newer picoPower variants (vsATMEGA329PA-AUR)
Ghi chú thiết kế
The ATMEGA329V-8AI's six power-saving modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) let engineers tune quiescent current from a few mA down to <1 uA in Power-down mode. For battery metering, switch to Power-down between user interactions and use the watchdog timer or external interrupt on a button to wake. Estimated: at Vcc = 3.0 V and room temperature, Power-down current is approximately 0.5 uA per the Microchip ATmega329 datasheet typical values; verify in your own measurement.
Place a 100 nF decoupling capacitor on each pair of VCC/GND pins (digital supply pins) as close as possible to the package - the 64-TQFP has multiple VCC pins distributed along the die perimeter. Add a bulk 4.7 uF to 10 uF capacitor on the main 3.3 V rail near the MCU. For LCD applications, follow the bias-network reference layout in the datasheet's LCD section, including the LCDCAP capacitor and proper ground isolation between analog and digital sections.
Common pitfalls: (1) Confusing the V (1.8 V minimum) variant with the non-V (2.7 V minimum) variant - the V part will fail to start at 2.5 V; (2) Forgetting that Port C pin 6 is the RESET pin by default - to use it as a regular GPIO you must program the RSTDISBL fuse; (3) Using the internal RC oscillator in noisy environments without calibration - the 8 MHz default is factory-calibrated to within +/- 3% at 3 V; (4) Drawing too much current from a single GPIO (max 40 mA per pin, 200 mA per package) when driving LCD backlights directly - use a transistor.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Standard grade only - not AEC-Q100 qualified; use ATmega329 automotive-grade variant for automotive designs.
