ATMEGA324PV-10AU - 8-bit AVR MCU, 32KB Flash, 10MHz, 44-TQFP | Microchip
MPN： ATMEGA324PV-10AU ✓ 啟用中ATMEGA324PV-10AU 概覽
An 8-bit AVR microcontroller (MCU) is a single-chip computer built on a modified Harvard RISC architecture developed by Atmel (now Microchip). It combines a CPU core, non-volatile Flash program memory, SRAM data memory, EEPROM, and a rich set of peripherals including timers, ADC, USART, SPI, I2C/TWI, and GPIO on one die. The AVR family is widely used in hobbyist (Arduino), industrial control, sensor interface, and low-power embedded applications because of its deterministic instruction timing, simple C-friendly toolchain (AVR-GCC), and on-chip debug support.
The ATmega324PV specifically targets the picoPower family, with advanced power-saving features including six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby), a real-time counter running from an internal oscillator, and the ability to wake on external interrupts. Peripherals of engineering note include two USARTs, a byte-oriented TWI (I2C) interface, a master/slave SPI, an 8-channel 10-bit ADC with optional differential channels, three flexible timer/counters with compare and PWM modes, a programmable watchdog timer with separate on-chip oscillator, and an on-chip analog comparator.
Architecture-wise, the ATmega324PV uses a two-stage pipelined RISC core with 131 powerful instructions, hardware multiplier, and JTAG/OCD debug interface. The 10 MHz speed grade is the lower-power variant in the family, with the 20 MHz ATmega324P-20AU offering higher throughput at the cost of higher current consumption. The 'V' suffix denotes the picoPower process with extended voltage range down to 1.8V, ideal for battery-powered designs.
Typical applications include industrial sensor nodes, smart metering, battery-powered data loggers, home automation controllers, USB-to-UART bridges, and Arduino-compatible custom boards. For designs requiring higher computational headroom, the ATmega324P-20AU (20 MHz) or ATmega644P (64KB Flash) are drop-in compatible variants. For designs requiring an enhanced peripheral set, the ATmega324PB adds more USART, SPI and PWM channels in the same TQFP-44 footprint.
直接替換替代品，適用於 ATMEGA324PV-10AU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA324PV-10AU （相同外形與佔位） — 差異在於 ADC, Program Memory (Flash), Package, EEPROM, Core Architecture.
ATMEGA324P-20AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA324PA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA324PV-10AN
✅ 直接替換📋 參考替代品（不在目錄中）
ATMEGA644PV-10AUR
✅ 直接替換📋 參考替代品（不在目錄中）
ATMEGA164A-AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA324PB-AU
✅ 直接替換📋 參考替代品（不在目錄中）
ATMEGA324PV-10AU 最大額定值與電氣特性
| Core Architecture | AVR 8-bit RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| Maximum CPU Frequency | 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General-Purpose I/O | 32 |
| General-Purpose Registers | 32 |
| Instruction Set | 131 instructions, most single-cycle |
| Performance | Up to 10 MIPS at 10 MHz |
| USART | 2 |
| SPI | 1 (master/slave) |
| TWI (I2C) | 1 byte-oriented |
| ADC | 8-channel, 10-bit |
| Timer/Counters | 3 (with PWM and compare modes) |
| Watchdog Timer | Yes, programmable with separate oscillator |
| Analog Comparator | Yes, on-chip |
| RTC | Yes, real-time counter |
| Debug Interface | JTAG / OCD (debugWIRE) |
| 封裝 | 44-pin TQFP (10x10 mm), 0.80 mm pitch |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (industrial) |
| Process Family | picoPower |
| RoHS 狀態 | Compliant |
ATMEGA324PV-10AU 腳位配置
| 腳位 1 | PB5 (MOSI) — Port B5 / SPI MOSI / OC1A |
| 腳位 2 | PB6 (MISO) — Port B6 / SPI MISO / OC1B |
| 腳位 3 | PB7 (SCK) — Port B7 / SPI SCK / OC1C |
| 腳位 4 | RESET — Reset input (active low) |
| 腳位 5 | VCC — Digital supply voltage (1.8V-5.5V) |
| 腳位 6 | GND — Ground |
| 腳位 7 | VCC — Digital supply voltage |
| 腳位 8 | GND — Ground |
| 腳位 9 | XTAL2 — Crystal oscillator output |
| 腳位 10 | XTAL1 — Crystal oscillator input |
| 腳位 11 | PD0 (RXD0) — Port D0 / USART0 RXD |
| 腳位 12 | PD1 (TXD0) — Port D1 / USART0 TXD |
| 腳位 13 | PD2 (INT0) — Port D2 / External Interrupt 0 |
| 腳位 14 | PD3 (INT1) — Port D3 / External Interrupt 1 |
| 腳位 15 | PD4 (OC1B) — Port D4 / Timer1 Compare B |
| 腳位 16 | PD5 (OC1A) — Port D5 / Timer1 Compare A |
| 腳位 17 | PD6 (ICP1) — Port D6 / Timer1 Input Capture |
| 腳位 18 | PD7 (OC2) — Port D7 / Timer2 Compare |
| 腳位 19 | PC0 (SCL) — Port C0 / TWI SCL / ADC0 |
| 腳位 20 | PC1 (SDA) — Port C1 / TWI SDA / ADC1 |
| 腳位 21 | PC2 (TCK) — Port C2 / JTAG TCK / ADC2 |
| 腳位 22 | PC3 (TMS) — Port C3 / JTAG TMS / ADC3 |
| 腳位 23 | PC4 (TDO) — Port C4 / JTAG TDO / ADC4 |
| 腳位 24 | PC5 (TDI) — Port C5 / JTAG TDI / ADC5 |
| 腳位 25 | PC6 (TOSC1) — Port C6 / Timer0 Oscillator / RESET |
| 腳位 26 | PC7 (TOSC2) — Port C7 / Timer0 Oscillator |
| 腳位 27 | AVCC — Analog supply voltage |
| 腳位 28 | AGND — Analog ground |
| 腳位 29 | AREF — ADC reference voltage |
| 腳位 30 | ADC6 — ADC input 6 (differential) |
| 腳位 31 | ADC7 — ADC input 7 (differential) |
| 腳位 32 | PA7 (ADC7) — Port A7 / ADC7 |
| 腳位 33 | PA6 (ADC6) — Port A6 / ADC6 |
| 腳位 34 | PA5 (ADC5) — Port A5 / ADC5 |
| 腳位 35 | PA4 (ADC4) — Port A4 / ADC4 |
| 腳位 36 | PA3 (ADC3) — Port A3 / ADC3 |
| 腳位 37 | PA2 (ADC2) — Port A2 / ADC2 |
| 腳位 38 | PA1 (ADC1) — Port A1 / ADC1 |
| 腳位 39 | PA0 (ADC0) — Port A0 / ADC0 |
| 腳位 40 | VCC — Digital supply voltage |
| 腳位 41 | GND — Ground |
| 腳位 42 | PB0 (XCK0) — Port B0 / USART0 XCK |
| 腳位 43 | PB1 (T1) — Port B1 / Timer1 External Clock |
| 腳位 44 | PB2 (AIN0) — Port B2 / Analog Comparator + |
典型應用
ATMEGA324PV-10AU 適用於 6 應用s: Industrial Sensor Node, Battery-Powered Data Logger, Home Automation Controller, USB-to-UART Bridge, Smart Meter Endpoint, Arduino-Compatible Custom Board.
Industrial Sensor Node
The ATMEGA324PV-10AU's 32KB Flash, 2KB SRAM, and 8-channel 10-bit ADC suit multi-signal industrial monitoring where several analog sensors (temperature, pressure, 4-20 mA loops) must be sampled and conditioned. The picoPower sleep currents under 1 uA in power-down mode and 1.8V minimum supply let the MCU run for years from a primary cell while still waking on external interrupts to log sensor events. The 32 GPIO and two USARTs allow direct connection to RS-485 transceivers for Modbus RTU slaves. Per the Microchip datasheet, the on-chip analog comparator and watchdog timer with dedicated oscillator provide robust fail-safe behavior in unattended installations.
推薦
Battery-Powered Data Logger
The ATMEGA324PV-10AU's picoPower process delivers typical active current around 4 mA at 3.3V/10 MHz and power-down current under 1 uA, enabling multi-year battery life in periodic-logging applications. The 32KB Flash stores firmware plus a small FAT filesystem, 1KB EEPROM holds configuration and calibration constants with 100k write endurance, and 2KB SRAM buffers sensor bursts between sleeps. The real-time counter running from an internal 32.768 kHz oscillator maintains wall-clock time without external crystals. With a single CR2032 cell, an hourly wake-and-log duty cycle can yield 5+ years of service life.
推薦
Home Automation Controller
Home automation hubs benefit from the ATMEGA324PV-10AU's dual USART, TWI (I2C), and SPI buses to bridge multiple radios (Zigbee, LoRa, BLE) with a Wi-Fi host MCU. The 32 GPIO drive low-voltage relay boards, keypad matrices, and indicator LEDs directly without external logic. With Arduino MightyCore firmware support, the same development environment used for prototyping scales directly to production. The 10 MHz speed grade keeps active power modest for always-on controllers that must stay responsive yet minimize standby energy consumption.
推薦
USB-to-UART Bridge
The ATMEGA324PV-10AU implements a USB CDC bridge by running V-USB on the AVR core, leveraging two hardware USARTs to expose dual serial ports over a single USB cable. At 10 MHz the firmware sustains 115200 bps full-duplex on both channels with low CPU loading. The wide 1.8V to 5.5V supply range simplifies integration with 1.8V host devices and 5V legacy peripherals. Internal pull-ups on TWI pins and the on-chip analog comparator support DTR/RTS handshaking without external components.
推薦
Smart Meter Endpoint
Utility smart-meter endpoints require low quiescent current, tamper-resistant secure storage, and reliable long-life operation - all delivered by the ATMEGA324PV-10AU's picoPower architecture. The 1KB EEPROM stores meter calibration and tamper counters with 100k write endurance, while the 32KB Flash holds metering firmware and protocol stacks such as DLMS/COSEM or Wireless M-Bus. The on-chip RTC with separate oscillator provides billing-grade timekeeping, and the watchdog timer guards against firmware hangs in unattended deployments.
推薦
Arduino-Compatible Custom Board
The ATMEGA324PV-10AU is supported by the MightyCore Arduino board package, delivering 32KB Flash, 2KB SRAM, and 32 GPIO - substantially more than the classic ATmega328P. Designers can reuse existing Arduino libraries for I2C, SPI, and UART peripherals while gaining extra timers and PWM channels for motor or lighting control. The 10 MHz speed grade reduces power consumption versus the 16/20 MHz ATmega328P variants used in Arduino Uno, beneficial for battery-powered clones and field-installable sensor nodes.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA324PV-10AU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA324P-20AU | ATMEGA324PA-AU | ATMEGA324PV-10AN | ATMEGA644PV-10AUR | ATMEGA164A-AU | ATMEGA324PB-AU |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Max CPU Frequency | 10 MHz | 20 MHz | 20 MHz | 10 MHz | 10 MHz | 20 MHz | 20 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB | 1 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | 512 B | 1 KB |
| Supply Voltage | 1.8 V to 5.5 V | 2.7 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 | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| picoPower | Yes | No | Yes | Yes | Yes | Yes | Yes |
| GPIO | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +105C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
主要差異化特點
- True 1.8V minimum supply operation across full temperature range (對比ATMEGA324P-20AU)
- Industry-standard TQFP-44 footprint with mature AVR toolchain support (對比ATMEGA164A-AU)
- Dual USART with hardware flow control (對比ATMEGA324PV-10AN)
- Direct Arduino MightyCore compatibility with 32KB Flash headroom (對比ATMEGA324PB-AU)
設計說明
Estimated: at VCC=3.3V, 10 MHz active CPU, typical core current is about 4 mA and drops to <1 uA in power-down mode with RTC running. For battery-powered designs, use sleep modes between sensor reads and disable unused peripherals via PRR (Power Reduction Register). The internal 8 MHz RC oscillator can be calibrated and used instead of an external crystal to save quiescent draw. Always include a 100 nF decoupling capacitor within 5 mm of each VCC pin and a 10 uF bulk capacitor at the board supply input.
The TQFP-44 has a typical theta_JA of about 50 C/W (JEDEC EIA/JESD51 4-layer board). With 4 mA active current at 5V, dissipation is roughly 20 mW, so junction rise above ambient is only about 1 C - no heatsink is needed. For sustained full-load operation at elevated ambient (>70C), verify that brown-out detector and watchdog remain within tolerance. The exposed pad on the package underside is not present on this part, so thermal relief comes solely from PCB copper pour on VCC/GND pins.
Place the 22 pF crystal load capacitors within 3 mm of XTAL1 and XTAL2 with short traces and a ground guard ring to reduce EMI coupling into the ADC. Route analog AVCC/AREF separately from digital VCC, joined only at a single point near the regulator. The 44-pin TQFP has 0.80 mm pitch - use 0.20 mm trace/space design rules and 0.40 mm via land to maintain manufacturability at standard PCB fab houses. Keep JTAG signals away from high-frequency switching nodes.
The ADC achieves 10-bit effective resolution only when the input source impedance stays below 10 kOhm per the datasheet. Add an external op-amp buffer if a high-impedance sensor (e.g. a thermistor divider) is connected directly. Decouple AREF with a 100 nF ceramic capacitor to AGND, and avoid switching digital signals near AREF traces. For SPI runs above 5 MHz, use series damping resistors (~22-33 ohm) at the SCK/MOSI drivers to reduce ringback.
Do not program the fuse bits for an external clock without first confirming the crystal is populated - a misconfigured ATmega may become bricked and require high-voltage parallel programming to recover. The 'V' suffix denotes the 1.8V-capable picoPower variant; writing 20 MHz timing to this 10 MHz part can cause Flash corruption during ISP programming. Always verify the signature byte 0x1E9511 at the start of any field firmware update. Use the internal watchdog timer (WDT) with a 1-second timeout to recover from software hangs in unattended deployments.
合規資訊
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - refer to ATmega324P-15CZ automotive variants for vehicle applications.