ATMEGA324P-A15AZ - 8-bit AVR MCU 32KB Flash 16MHz TQFP-44 | Microchip
MPN: ATMEGA324P-A15AZ ✓ פעילATMEGA324P-A15AZ סקירה
A microcontroller (MCU) integrates a processor core, memory, and programmable peripherals on a single chip, forming the lowest tier of the embedded-system hierarchy: transistor -> logic IC -> microcontroller -> system-on-module. The AVR family uses an advanced RISC architecture with 131 mostly single-cycle instructions and 32 general-purpose working registers, allowing a throughput close to 1 MIPS per MHz.
Key features of the ATMEGA324P-A15AZ include picoPower low-power technology, read-while-write Flash programming, and a rich peripheral set: three flexible timer/counters with compare modes and PWM, two USARTs, a byte-oriented Two-Wire (I2C) serial interface, and an 8-channel 10-bit ADC. Supply voltage is rated 4.5V to 5.5V for this speed grade (the AVR family spans 2.7V to 5.5V across variants).
The picoPower technology reduces power in idle and power-down modes, which is significant in automotive battery-connected nodes. The AVR Harvard architecture separates program and data buses, letting instruction fetches overlap with data access for efficient C-code execution. In-System Programming (ISP) enables field firmware updates without removing the device from the PCB.
Typical applications include automotive body and comfort modules, industrial sensor nodes, motor control auxiliaries, and building-automation controllers. The AEC-Q100 qualification and automotive temperature grade make it suitable for under-dash and cabin environments.
Design consideration: respect the 5V supply requirement of this speed grade and budget EEPROM write endurance in logging applications. Ensure SPI/TQFP thermal relief per Microchip layout guidance.
This page synthesizes distributor inventory, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet. Pricing information as of 2026-09-17 is quote-based at listed distributors.
חלופות תחליף ישיר עבור ATMEGA324P-A15AZ — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם ATMEGA324P-A15AZ (אותו גורם צורה וטביעת רגל) — שונים ב Package, ADC, Flash Memory, Instructions, Serial Interfaces.
ATMEGA324P-20AUR
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATMEGA324A-AU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATMEGA324P-20MQ
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATMEGA324P-A15MZ
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←ATMEGA324P-B15AZ
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATMEGA324P-A15AZ דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 32 KB |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| Maximum Clock Speed | 16 MHz |
| מתח אספקה | 4.5 V to 5.5 V |
| Family Supply Voltage Range | 2.7 V to 5.5 V (across variants) |
| General Purpose I/O | 32 lines |
| Working Registers | 32 general purpose |
| Instructions | 131 instructions, most single-cycle |
| Timers/Counters | 3 flexible timer/counters with compare modes and PWM |
| USART | 2 |
| Serial Interfaces | Two-Wire (I2C) byte-oriented serial interface |
| ADC | 8-channel, 10-bit |
| מארז | 44-TQFP, 10 x 10 mm, 1 mm height, 0.8 mm pitch |
| סוג הרכבה | Surface Mount |
| Qualification | Automotive, AEC-Q100 |
| Temperature Grade | Automotive |
| Special Technology | picoPower low power |
| Flash Programming | ISP with read-while-write |
תצורת פינים של ATMEGA324P-A15AZ
| פין 1 | PC6 (RESET) — Port C bit 6 / Reset input |
| פין 2 | PD0 (RXD0) — Port D bit 0 / USART0 receive |
| פין 3 | PD1 (TXD0) — Port D bit 1 / USART0 transmit |
| פין 4 | PD2 (RXD1/INT0) — Port D bit 2 / USART1 receive / External interrupt 0 |
| פין 5 | PD3 (TXD1/INT1) — Port D bit 3 / USART1 transmit / External interrupt 1 |
| פין 6 | PD4 (XCK1/T1) — Port D bit 4 / USART1 clock / Timer1 external clock |
| פין 7 | VCC — Digital supply voltage |
| פין 8 | GND — Ground |
| פין 9 | PB6 (XTAL1/TOSC1) — Port B bit 6 / Crystal oscillator input |
| פין 10 | PB7 (XTAL2/TOSC2) — Port B bit 7 / Crystal oscillator output |
| פין 11 | PD5 (XCK0/T0) — Port D bit 5 / USART0 clock / Timer0 external clock |
| פין 12 | PD6 (OC0A/AIN0) — Port D bit 6 / Timer0 compare output A / Analog comparator input 0 |
| פין 13 | PD7 (OC2A/AIN1) — Port D bit 7 / Timer2 compare output A / Analog comparator input 1 |
| פין 14 | PB0 (SS/PCINT0) — Port B bit 0 / SPI slave select / Pin change interrupt 0 |
| פין 15 | PB1 (SCK/PCINT1) — Port B bit 1 / SPI clock / Pin change interrupt 1 |
| פין 16 | PB2 (MOSI/PCINT2) — Port B bit 2 / SPI master out / Pin change interrupt 2 |
| פין 17 | PB3 (MISO/PCINT3) — Port B bit 3 / SPI master in / Pin change interrupt 3 |
| פין 18 | PB4 (OC2A/PCINT4) — Port B bit 4 / Timer2 compare output / Pin change interrupt 4 |
| פין 19 | PB5 (OC1A/PCINT5) — Port B bit 5 / Timer1 compare output A / Pin change interrupt 5 |
| פין 20 | AVCC — ADC supply voltage |
| פין 21 | AREF — ADC analog reference |
| פין 22 | GND — Ground |
| פין 23 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| פין 24 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| פין 25 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| פין 26 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| פין 27 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| פין 28 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| פין 29 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| פין 30 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| פין 31 | PC0 (SCL/T8) — Port C bit 0 / Two-Wire clock |
| פין 32 | PC1 (SDA) — Port C bit 1 / Two-Wire data |
| פין 33 | PC2 (TCK) — Port C bit 2 / JTAG test clock |
| פין 34 | PC3 (TMS) — Port C bit 3 / JTAG test mode select |
| פין 35 | PC4 (TDO) — Port C bit 4 / JTAG test data out |
| פין 36 | PC5 (TDI) — Port C bit 5 / JTAG test data in |
| פין 37 | PC7 (TOSC2) — Port C bit 7 / Timer oscillator output |
| פין 38 | PD0 (OC0B/SCL) — Port D alternate function (32-pin mapping variant); see datasheet TQFP-44 port map |
| פין 39 | PD1 (SDA) — Port D alternate function; see datasheet TQFP-44 port map |
| פין 40 | PD2 (RXD1) — Port D alternate function; see datasheet TQFP-44 port map |
| פין 41 | PD3 (TXD1) — Port D alternate function; see datasheet TQFP-44 port map |
| פין 42 | PD4 (XCK1) — Port D alternate function; see datasheet TQFP-44 port map |
| פין 43 | PD5 (XCK0) — Port D alternate function; see datasheet TQFP-44 port map |
| פין 44 | PD6 (OC0A) — Port D alternate function; see datasheet TQFP-44 port map |
יישומים טיפוסיים
ATMEGA324P-A15AZ מתאים עבור 6 יישוםs: Automotive Body Electronics, Industrial Sensor Nodes, Building Automation Controllers, Battery-Powered Metering, Consumer Appliance Control, Automotive Diagnostic and Telematics Accessories.
Automotive Body Electronics
The ATMEGA324P-A15AZ fits automotive body-control subfunctions such as lighting modules, seat adjusters, and mirror controllers because it combines AEC-Q100 qualification with 32 GPIO lines for driving loads and relays, plus a 10-bit ADC for switch and sensor monitoring. The 5V, 16 MHz core executes lamp-decision logic and LIN-like polling loops (two USARTs available for serial links) with ample timing margin. In a typical circuit the MCU drives high-side switches through GPIO with a 4.5V-5.5V rail supplied from a car-network 5V LDO, and picoPower sleep modes cut quiescent draw when the module awaits wake events, protecting battery state during parking periods.
מומלץ
Industrial Sensor Nodes
Industrial sensor acquisition nodes benefit from the ATMEGA324P-A15AZ's 8-channel 10-bit ADC, which multiplexes up to eight analog sensors (temperature, pressure, level) without external analog multiplexers, and its 1KB EEPROM for storing calibration constants that survive power cycles. The Two-Wire (I2C) interface connects external displays or EEPROM expansions, while a USART streams readings to a PLC or gateway. Running at 16 MHz from a 5V industrial rail gives roughly 16 MIPS of headroom for filtering and linearization math in C. Noise rejection in electrically harsh plants is supported by the AVR's brown-out detection and watchdog timer, keeping nodes self-recovering.
מומלץ
Building Automation Controllers
Room controllers, damper actuators, and HVAC zone boards are well served by the ATMEGA324P-A15AZ because its three timer/counters generate PWM signals for fan and valve actuation, its two USARTs accommodate RS-485 style half-duplex field buses through external transceivers, and 32 I/O lines read thermostats and drive status LEDs. The 44-TQFP 10x10 mm package fits cost-sensitive two-layer control boards. With 32KB Flash, full protocol stacks plus a PID loop coexist without external memory. The 5V supply matches legacy building-wiring levels, and the ADC enables NTC-based room-temperature measurement directly on-chip at 10-bit resolution.
מומלץ
Battery-Powered Metering
Utility sub-meters and battery-backed counters use the ATMEGA324P-A15AZ's picoPower technology: sleep modes allow the MCU to idle between measurement windows while the asynchronous timer keeps a real-time counter running, extending battery life in installed meters. The 10-bit ADC samples shunt or Hall-effect current signals, the 1KB EEPROM logs consumption indices across resets, and a USART forwards totals on demand. Although this 16 MHz automotive grade targets 5V operation, meter designers value the AEC-Q100 process consistency and the Flash read-while-write feature, which lets logging occur in Flash while firmware stays resident without stalls that corrupt timing.
מומלץ
Consumer Appliance Control
Appliance boards - coffee machines, air purifiers, small ovens - adopt the ATMEGA324P-A15AZ when its automotive process consistency is desired for high-reliability consumer lines. The 16 MHz AVR core runs menu logic and encoder handling from a single-chip design: 32 GPIO lines drive a segment LCD through external driver or LEDs directly, the ADC reads NTC probes and touch/potentiometer settings, and timer PWM controls heaters and fan motors at 5V logic with external power stages. The 44-TQFP gull-wing package hand-solders and reflows easily for regional assembly. Flash ISP supports final-programming at end-of-line without removing parts from boards.
מומלץ
Automotive Diagnostic and Telematics Accessories
Diagnostic dongles and telematics accessory modules use the ATMEGA324P-A15AZ's two USARTs to bridge in-vehicle serial links and telemetry radios simultaneously, one channel to the vehicle bus transceiver and one to a cellular or GNSS modem. The 16 MHz throughput sustains transparent pass-through logging at typical bus rates, while the 2KB SRAM buffers frames during radio outages. AEC-Q100 qualification matches the automotive supply chain expectations of tiered accessory suppliers. The 10-bit ADC can additionally monitor board temperature and vehicle supply levels for fault reporting, and picoPower modes keep the module dormant between ignition cycles.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ATMEGA324P-A15AZ — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | ATMEGA324P-20AUR | ATMEGA324A-AU | ATMEGA324P-20MQ | ATMEGA324P-A15MZ | ATMEGA324P-B15AZ |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP - same | 44-TQFP - same | 44-VQFN (not same footprint) | 44-TQFP - same | 44-TQFP - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash / SRAM / EEPROM | 32KB / 2KB / 1KB | 32KB / 2KB / 1KB | 32KB / 2KB / 1KB | 32KB / 2KB / 1KB | 32KB / 2KB / 1KB | 32KB / 2KB / 1KB |
| Automotive AEC-Q100 | Yes | No (industrial) | No (industrial) | No (industrial) | Yes | Yes |
| USART / Timers / ADC | 2 USART / 3 timers / 8ch 10-bit | 2 / 3 / 8ch 10-bit | 2 / 3 / 8ch 10-bit | 2 / 3 / 8ch 10-bit | 2 / 3 / 8ch 10-bit | 2 / 3 / 8ch 10-bit |
| Special Technology | picoPower | picoPower (P die) | A-die refresh | picoPower (P die) | picoPower | B-die (enhanced low-voltage family) |
מבדילים עיקריים
- AEC-Q100 automotive qualification (לעומתATMEGA324P-20AUR)
- Pin-identical refresh migration path (לעומתATMEGA324A-AU)
- 5V 16 MHz operating point matches legacy automotive rails (לעומתATMEGA324P-B15AZ)
הערות תכנון
The -15AZ speed grade is specified at 4.5V to 5.5V. If your board also hosts 3.3V peripherals, isolate the MCU rail with a 5V LDO and use level shifting (series resistors on Two-Wire lines, proper direction translation on USART) rather than under-powering the MCU, since below 4.5V the 16 MHz frequency-voltage guarantee is void. Decouple each VCC/AVCC pin with 100 nF ceramic capacitors placed within 5 mm of the pins, plus bulk 10 uF at the board inlet. Estimated: an active-mode current in the low mA range at 16 MHz, 5V implies roughly 80 mW core power, well within TQFP-44 thermal capability without a heatsink.
Keep AVCC connected to VCC through a low-pass RC network (10 uH inductor or 100-ohm resistor plus 100 nF) when ADC accuracy matters; never leave AVCC floating. Route the AREF pin with its own 100 nF capacitor to ground and do not drive it externally when the internal reference is selected. The crystal on XTAL1/XTAL2 needs load capacitors matched to the crystal specification (typically 12-22 pF range - verify against the crystal datasheet) and short traces under 15 mm. Follow Microchip AVR hardware design application notes for ISP header placement (6-pin ISP header on the same SPI pins PB0-PB3).
PC6 is RESET by default - enabling it as GPIO removes in-circuit ISP programming unless JTAG or a bootloader window is arranged first; always verify you can still reprogram before repurposing it. Also, EEPROM wear is finite: polling loops that write EEPROM every second will exhaust 100k-cycle endurance within days - move frequent logging to SRAM and batch writes. Finally, this automotive AZ part is frequently counterfeited on gray markets; buy from franchised distributors or MicrochipDirect to guarantee AEC-Q100 traceability.
מידע על תאימות
AEC-Q100 automotive qualification confirmed via atmel-micro.com and Microchip USA listings. RoHS/REACH certificates not stated in retrieved data - verify via Microchip quality documentation.
