ATMEGA329V-8AI - 8-bit AVR MCU 32KB Flash LCD | Microchip
MPN: ATMEGA329V-8AI ✓ نشطATMEGA329V-8AI نظرة عامة
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.
بدائل مباشرة لـ ATMEGA329V-8AI — 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 ATMEGA329V-8AI (نفس عامل الشكل والبصمة) — يختلف في Package, LCD Controller, ADC, Core Architecture, Timers/Counters.
ATMEGA329-16AI
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329-16AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329A-MUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329P-20AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329PA-AUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA329V-8AI الحدود القصوى والخصائص الكهربائية
| 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) |
| العلبة | 64-pin TQFP, 14x14 mm body, 0.5 mm pitch |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40C to +85C (industrial) |
| حالة RoHS | Compliant |
تكوين أطراف ATMEGA329V-8AI
| دبوس 1 | AVCC — Analog supply voltage |
| دبوس 2 | AREF — Analog reference voltage |
| دبوس 3 | AGND — Analog ground |
| دبوس 4 | LCDCAP — LCD capacitor connection |
| دبوس 5 | SEG0 — LCD segment 0 |
| دبوس 6 | SEG1 — LCD segment 1 |
| دبوس 7 | SEG2 — LCD segment 2 |
| دبوس 8 | SEG3 — LCD segment 3 |
| دبوس 9 | SEG4 — LCD segment 4 |
| دبوس 10 | SEG5 — LCD segment 5 |
| دبوس 11 | SEG6 — LCD segment 6 |
| دبوس 12 | SEG7 — LCD segment 7 |
| دبوس 13 | SEG8 — LCD segment 8 |
| دبوس 14 | SEG9 — LCD segment 9 |
| دبوس 15 | SEG10 — LCD segment 10 |
| دبوس 16 | SEG11 — LCD segment 11 |
| دبوس 17 | SEG12 — LCD segment 12 |
| دبوس 18 | SEG13 — LCD segment 13 |
| دبوس 19 | SEG14 — LCD segment 14 |
| دبوس 20 | SEG15 — LCD segment 15 |
| دبوس 21 | SEG16 — LCD segment 16 |
| دبوس 22 | SEG17 — LCD segment 17 |
| دبوس 23 | SEG18 — LCD segment 18 |
| دبوس 24 | SEG19 — LCD segment 19 |
| دبوس 25 | SEG20 — LCD segment 20 |
| دبوس 26 | SEG21 — LCD segment 21 |
| دبوس 27 | SEG22 — LCD segment 22 |
| دبوس 28 | SEG23 — LCD segment 23 |
| دبوس 29 | COM0 — LCD common 0 |
| دبوس 30 | COM1 — LCD common 1 |
| دبوس 31 | COM2 — LCD common 2 |
| دبوس 32 | COM3 — LCD common 3 |
| دبوس 33 | VCC — Digital supply voltage |
| دبوس 34 | GND — Digital ground |
| دبوس 35 | XTAL2 — Crystal oscillator output |
| دبوس 36 | XTAL1 — Crystal oscillator input |
| دبوس 37 | PD0 — Port D bit 0 / RXD |
| دبوس 38 | PD1 — Port D bit 1 / TXD |
| دبوس 39 | PD2 — Port D bit 2 / INT0 |
| دبوس 40 | PD3 — Port D bit 3 / INT1 |
| دبوس 41 | PD4 — Port D bit 4 / OC1B |
| دبوس 42 | PD5 — Port D bit 5 / OC1A |
| دبوس 43 | PD6 — Port D bit 6 / ICP1 |
| دبوس 44 | PD7 — Port D bit 7 / OC2 |
| دبوس 45 | PC0 — Port C bit 0 / A8 |
| دبوس 46 | PC1 — Port C bit 1 / A9 |
| دبوس 47 | PC2 — Port C bit 2 / A10 |
| دبوس 48 | PC3 — Port C bit 3 / A11 |
| دبوس 49 | PC4 — Port C bit 4 / I2C SDA |
| دبوس 50 | PC5 — Port C bit 5 / I2C SCL |
| دبوس 51 | PC6 — Port C bit 6 / RESET |
| دبوس 52 | PC7 — Port C bit 7 |
| دبوس 53 | PB0 — Port B bit 0 / SS |
| دبوس 54 | PB1 — Port B bit 1 / SCK |
| دبوس 55 | PB2 — Port B bit 2 / MOSI |
| دبوس 56 | PB3 — Port B bit 3 / MISO |
| دبوس 57 | PB4 — Port B bit 4 / OC0A |
| دبوس 58 | PB5 — Port B bit 5 / OC1B |
| دبوس 59 | PB6 — Port B bit 6 / OC1A |
| دبوس 60 | PB7 — Port B bit 7 / OC0B |
| دبوس 61 | PA0 — Port A bit 0 / ADC0 |
| دبوس 62 | PA1 — Port A bit 1 / ADC1 |
| دبوس 63 | PA2 — Port A bit 2 / ADC2 |
| دبوس 64 | PA3 — Port A bit 3 / ADC3 |
التطبيقات النموذجية
ATMEGA329V-8AI مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATMEGA329V-8AI — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Low-voltage 1.8 V minimum Vcc operation (مقابلATMEGA329-16AI)
- Mature on-chip LCD controller up to 4x25 segments (مقابلATMEGA328P-PU)
- Same TQFP-64 footprint as newer picoPower variants (مقابلATMEGA329PA-AUR)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant per Microchip product page. Standard grade only - not AEC-Q100 qualified; use ATmega329 automotive-grade variant for automotive designs.
