ATMEGA640-16AU - 8-bit AVR MCU 16MHz 64KB Flash | Microchip
MPN: ATMEGA640-16AU ✓ Hoạt độngATMEGA640-16AU Tóm tắt
An 8-bit AVR microcontroller is a member of the microcontroller unit (MCU) family that integrates a processor core, program memory, data memory, and peripherals on a single die. Within the embedded-system hierarchy, the MCU sits at the control layer, orchestrating sensors, actuators, and communication interfaces. The AVR enhanced RISC core executes most instructions in a single clock cycle, delivering approximately 1 MIPS per MHz of throughput, which is the throughput-per-megahertz benchmark used across the ATmega lineup. The 16 MHz speed grade therefore yields ~16 MIPS, while in-system programmable (ISP) Flash allows firmware updates without removing the device from the PCB.
Key features include 86 general-purpose I/O lines, 32 general-purpose working registers, a real-time counter, six flexible timer/counters with compare modes and PWM, four USARTs, a byte-oriented 2-wire serial interface (I2C/TWI), an SPI interface, a 16-channel 10-bit ADC, and an on-chip JTAG interface for boundary-scan and on-chip debugging. The 16 MHz speed grade and 2.7 V to 5.5 V supply range cover both 3.3 V and 5 V rails, simplifying mixed-voltage designs.
The AVR enhanced RISC architecture combines a rich instruction set with single-cycle execution, while ISP Flash enables in-system firmware updates. The generous 86-I/O count and 16 PWM channels suit multi-axis motor control, and the four USARTs enable multi-channel serial communication such as RS-485 networks or multi-drop sensor buses.
Typical applications include industrial automation controllers, building automation, 3D printers and CNC controllers, Arduino Mega-class development platforms (via MegaCore support), and multi-sensor instrumentation. The wide TQFP-100 footprint provides ample I/O for gateways, and the JTAG debug port speeds firmware bring-up.
Design consideration: ensure decoupling capacitors on all VCC/AVCC pins and account for the wide TQFP-100 footprint in PCB routing; the ADC reference and AVCC supply should be filtered separately from digital VCC to preserve ADC accuracy at 10 bits.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA640-16AU — 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 ATMEGA640-16AU (cùng hình factor và footprint) — khác nhau ở Package, Watchdog Timer, ADC, Timers/Counters, ADC Channels.
ATMEGA1280-16AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA2560-16AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA640V-8AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA640-16CU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA640-16AU Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR Enhanced RISC (8-bit) |
| Series | ATmega640 |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 8 KB |
| EEPROM | 4 KB |
| Tần số xung maksimum | 16 MHz |
| Throughput | ~16 MIPS |
| Điện áp cung cấp | 2.7 V to 5.5 V |
| I/O Pins | 86 |
| ADC | 16 channels x 10-bit |
| PWM Channels | 16 |
| Timers/Counters | 6 |
| USART | 4 |
| SPI | 1 |
| TWI (I2C) | 1 |
| Hộp | 100-pin TQFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| In-System Programming | Yes (ISP) |
| On-Chip Debug | JTAG |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATMEGA640-16AU
| Chân 1 | PE5 — Port E bit 5 (GPIO / OC3C) |
| Chân 2 | PE4 — Port E bit 4 (GPIO / OC3B / INT4) |
| Chân 3 | PE3 — Port E bit 3 (GPIO / OC3A / AIN1) |
| Chân 4 | PE2 — Port E bit 2 (GPIO / OC3B / AIN0) |
| Chân 5 | PE1 — Port E bit 1 (GPIO / TXD0) |
| Chân 6 | PE0 — Port E bit 0 (GPIO / RXD0 / PCINT8) |
| Chân 7 | VCC — Digital supply voltage |
| Chân 8 | GND — Ground |
| Chân 9 | PB0 — Port B bit 0 (GPIO / SS / PCINT0) |
| Chân 10 | PB1 — Port B bit 1 (GPIO / SCK / PCINT1) |
| Chân 11 | PB2 — Port B bit 2 (GPIO / MOSI / PCINT2) |
| Chân 12 | PB3 — Port B bit 3 (GPIO / MISO / PCINT3) |
| Chân 13 | PB4 — Port B bit 4 (GPIO / OC2A / PCINT4) |
| Chân 14 | PB5 — Port B bit 5 (GPIO / OC1A / PCINT5) |
| Chân 15 | PB6 — Port B bit 6 (GPIO / OC1B / PCINT6) |
| Chân 16 | PB7 — Port B bit 7 (GPIO / OC0A / OC1C / PCINT7) |
| Chân 17 | PG5 — Port G bit 5 (GPIO / OC0B) |
| Chân 18 | PG4 — Port G bit 4 (GPIO / TOSC1) |
| Chân 19 | PG3 — Port G bit 3 (GPIO / TOSC2) |
| Chân 20 | PG2 — Port G bit 2 (GPIO / AMR - alternator) |
| Chân 21 | RESET — Reset input (active low) |
| Chân 22 | VCC — Digital supply voltage |
| Chân 23 | GND — Ground |
| Chân 24 | XTAL2 — Crystal oscillator output |
| Chân 25 | XTAL1 — Crystal oscillator input |
| Chân 26 | PD0 — Port D bit 0 (GPIO / SCL / INT0) |
| Chân 27 | PD1 — Port D bit 1 (GPIO / SDA / INT1) |
| Chân 28 | PD2 — Port D bit 2 (GPIO / RXD1 / INT2) |
| Chân 29 | PD3 — Port D bit 3 (GPIO / TXD1 / INT3) |
| Chân 30 | PD4 — Port D bit 4 (GPIO / ICP1 / OC1B) |
| Chân 31 | PD5 — Port D bit 5 (GPIO / XCK1) |
| Chân 32 | PD6 — Port D bit 6 (GPIO / T1) |
| Chân 33 | PD7 — Port D bit 7 (GPIO / T0) |
| Chân 34 | PG0 — Port G bit 0 (GPIO / WR) |
| Chân 35 | PG1 — Port G bit 1 (GPIO / RD) |
| Chân 36 | PC0 — Port C bit 0 (GPIO / A8) |
| Chân 37 | PC1 — Port C bit 1 (GPIO / A9) |
| Chân 38 | PC2 — Port C bit 2 (GPIO / A10) |
| Chân 39 | PC3 — Port C bit 3 (GPIO / A11) |
| Chân 40 | PC4 — Port C bit 4 (GPIO / A12) |
| Chân 41 | PC5 — Port C bit 5 (GPIO / A13) |
| Chân 42 | PC6 — Port C bit 6 (GPIO / A14) |
| Chân 43 | PC7 — Port C bit 7 (GPIO / A15) |
| Chân 44 | VCC — Digital supply voltage |
| Chân 45 | GND — Ground |
| Chân 46 | PJ0 — Port J bit 0 (GPIO / RXD3 / PCINT9) |
| Chân 47 | PJ1 — Port J bit 1 (GPIO / TXD3 / PCINT10) |
| Chân 48 | PJ2 — Port J bit 2 (GPIO / XCK3 / PCINT11) |
| Chân 49 | PJ3 — Port J bit 3 (GPIO / PCINT12) |
| Chân 50 | PJ4 — Port J bit 4 (GPIO / PCINT13) |
| Chân 51 | PJ5 — Port J bit 5 (GPIO / PCINT14) |
| Chân 52 | PJ6 — Port J bit 6 (GPIO / PCINT15) |
| Chân 53 | PJ7 — Port J bit 7 |
| Chân 54 | PA0 — Port A bit 0 (GPIO / AD0) |
| Chân 55 | PA1 — Port A bit 1 (GPIO / AD1) |
| Chân 56 | PA2 — Port A bit 2 (GPIO / AD2) |
| Chân 57 | PA3 — Port A bit 3 (GPIO / AD3) |
| Chân 58 | PA4 — Port A bit 4 (GPIO / AD4) |
| Chân 59 | PA5 — Port A bit 5 (GPIO / AD5) |
| Chân 60 | PA6 — Port A bit 6 (GPIO / AD6) |
| Chân 61 | PA7 — Port A bit 7 (GPIO / AD7) |
| Chân 62 | VCC — Digital supply voltage |
| Chân 63 | GND — Ground |
| Chân 64 | PF0 — Port F0 (GPIO / ADC0A1) |
| Chân 65 | PF1 — Port F1 (GPIO / ADC1A1) |
| Chân 66 | PF2 — Port F2 (GPIO / ADC2A1) |
| Chân 67 | PF3 — Port F3 (GPIO / ADC3A1) |
| Chân 68 | PF4 — Port F4 (GPIO / ADC4A1 / TCK) |
| Chân 69 | PF5 — Port F5 (GPIO / ADC5A1 / TMS) |
| Chân 70 | PF6 — Port F6 (GPIO / ADC6A1 / TDO) |
| Chân 71 | PF7 — Port F7 (GPIO / ADC7A1 / TDI) |
| Chân 72 | AREF — ADC reference voltage |
| Chân 73 | GND — Ground |
| Chân 74 | AVCC — Analog supply voltage |
| Chân 75 | PK0 — Port K bit 0 (GPIO / ADC8A2) |
| Chân 76 | PK1 — Port K bit 1 (GPIO / ADC9A2) |
| Chân 77 | PK2 — Port K bit 2 (GPIO / ADC10A2) |
| Chân 78 | PK3 — Port K bit 3 (GPIO / ADC11A2) |
| Chân 79 | PK4 — Port K bit 4 (GPIO / ADC12A2) |
| Chân 80 | PK5 — Port K bit 5 (GPIO / ADC13A2) |
| Chân 81 | PK6 — Port K bit 6 (GPIO / ADC14A2) |
| Chân 82 | PK7 — Port K bit 7 (GPIO / ADC15A2) |
| Chân 83 | PH0 — Port H bit 0 (GPIO / RXD2) |
| Chân 84 | PH1 — Port H bit 1 (GPIO / TXD2) |
| Chân 85 | PH2 — Port H bit 2 (GPIO / XCK2) |
| Chân 86 | PH3 — Port H bit 3 (GPIO / OC4A) |
| Chân 87 | PH4 — Port H bit 4 (GPIO / OC4B) |
| Chân 88 | PH5 — Port H bit 5 (GPIO / OC4C) |
| Chân 89 | PH6 — Port H bit 6 (GPIO / OC2B) |
| Chân 90 | PH7 — Port H bit 7 (GPIO / OC2A) |
| Chân 91 | PL0 — Port L bit 0 (GPIO / ICP4) |
| Chân 92 | PL1 — Port L bit 1 (GPIO / ICP5) |
| Chân 93 | PL2 — Port L bit 2 (GPIO / T5) |
| Chân 94 | PL3 — Port L bit 3 (GPIO / T4) |
| Chân 95 | PL4 — Port L bit 4 (GPIO / T3) |
| Chân 96 | PL5 — Port L bit 5 (GPIO / T2) |
| Chân 97 | PL6 — Port L bit 6 (GPIO / T1) |
| Chân 98 | PL7 — Port L bit 7 (GPIO / T0) |
| Chân 99 | VCC — Digital supply voltage |
| Chân 100 | GND — Ground |
Ứng dụng tiêu biểu
ATMEGA640-16AU phù hợp cho 7 Áp dụngs: Industrial Automation Controller, 3D Printer / CNC Controller Board, Building Automation Gateway, Arduino Mega-Class Development Platform, Multi-Sensor Data Acquisition System, Multi-Channel Serial Communication Hub, Educational Microcontroller Trainer.
Industrial Automation Controller
The ATMEGA640-16AU fits industrial automation controllers because its 86 GPIO lines and four USARTs let it fan out to multiple RS-485 sensor nodes and actuator drivers from a single MCU. Its 16 MHz AVR core delivers ~16 MIPS, which is sufficient for sub-10 ms PLC scan loops and modest motion-control math, while the 64 KB Flash holds ladder-logic interpreters or IEC 61131-3 runtimes comfortably. The 2.7-5.5 V supply tolerates 24 V industrial rails after step-down. A 16-channel 10-bit ADC reads analog process variables, and the six timers with 16 PWM channels drive valve actuators and brushed-motor stages without external PWM ICs.
Được đề xuất
3D Printer / CNC Controller Board
The ATMEGA640-16AU is a strong fit for 3D printer and CNC controller boards because the six timer/counters with 16 PWM channels can drive multiple stepper-driver DIR/STEP lines, and the four USARTs expose serial console, Bluetooth, and a touchscreen module simultaneously. Its 64 KB Flash is enough for Marlin-class firmware builds, and ISP plus JTAG let makers iterate firmware in-place. The 16 MHz throughput plus hardware quadrature-friendly timers position it as a low-cost alternative to ARM Cortex-M0 designs in hobbyist CNC boards where MegaCore Arduino compatibility is desired.
Được đề xuất
Building Automation Gateway
The ATMEGA640-16AU is well suited to building-automation gateways where it must talk Modbus, BACnet, KNX, or proprietary sensor buses while running a control loop. The four USARTs handle multiple isolated RS-485 trunks with external transceivers, the TWI/I2C bus talks to environmental sensors, and the 86 GPIOs drive relay boards and indicator panels. The 8 KB SRAM fits small protocol stacks, and the 2.7-5.5 V supply range simplifies 24 V bus-powered designs. JTAG debug accelerates field firmware updates via ISP.
Được đề xuất
Arduino Mega-Class Development Platform
The ATMEGA640-16AU is supported by the open-source MegaCore Arduino core, making it a cost-down alternative to the ATmega2560 for Arduino-Mega-class development boards. With 64 KB Flash and 8 KB SRAM it runs the standard Arduino Mega bootloader and most Arduino libraries unmodified. The 86 GPIOs match the Arduino Mega pinout, so existing shields (RAMPS motor shields, sensor shields, display shields) plug in unchanged. This makes the part attractive to education and rapid-prototyping use cases where Arduino compatibility is required.
Được đề xuất
Multi-Sensor Data Acquisition System
The ATMEGA640-16AU fits multi-sensor data-acquisition systems because its 16-channel 10-bit ADC reads up to 16 analog inputs directly without external muxes, and its 86 GPIOs scan matrix keypads, encoders, and digital sensors in the same design. The 64 KB Flash holds small DSP-style filtering or calibration tables, while 8 KB SRAM buffers time-series sample blocks between UART transfers to a host PC. The four USARTs let the same board log to multiple hosts or stack into daisy-chained sensor networks.
Được đề xuất
Multi-Channel Serial Communication Hub
The ATMEGA640-16AU works as a multi-channel serial hub because it integrates four independent USARTs plus an SPI and a TWI interface, enabling a single MCU to bridge Modbus RTU, Modbus ASCII, DMX-512, GPS, and I2C sensor traffic simultaneously. Its 64 KB Flash fits protocol-conversion firmware, and 8 KB SRAM holds message queues between channels. The 2.7-5.5 V supply simplifies mixed 3.3 V/5 V sensor boards, while 86 GPIOs drive per-channel indicators and configuration switches.
Được đề xuất
Educational Microcontroller Trainer
The ATMEGA640-16AU fits educational microcontroller trainers thanks to its generous 86 GPIOs that allow multiple student groups to wire up peripherals on one board without bus contention, plus JTAG and ISP that give instructors direct register-level debug access. The AVR GCC toolchain and Atmel Studio / MPLAB X IDE are free, well-documented, and supported by extensive textbook material. The 2.7-5.5 V supply lets the same trainer board work with both 3.3 V and 5 V peripherals, covering the modern low-voltage and legacy 5 V labs in a single platform.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA640-16AU — 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 | ATMEGA1280-16AU | ATMEGA2560-16AU | ATMEGA640V-8AU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-100 (14x14) | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same | TQFP-100 (14x14) - same |
| Flash Memory | 64 KB | 128 KB | 256 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 8 MHz |
| I/O Pins | 86 | 86 | 86 | 86 |
| Supply Voltage | 2.7 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 |
Bảo phân biệt quan trọng
- Lowest-cost I/O-rich ATmega in TQFP-100 with 86 GPIO (vsATMEGA2560-16AU)
- Faster 16 MHz operation with same TQFP-100 pinout (vsATMEGA640V-8AU)
- Drop-in upgrade path without PCB rework (vsATMEGA640-16CU)
Ghi chú thiết kế
Place 100 nF decoupling capacitors within 5 mm of every VCC/AVCC pin (5 VCC pins + 1 AVCC pin in TQFP-100) and a single bulk 10 uF tantalum or ceramic cap on each supply rail. AVCC must be filtered through a ferrite bead or 10 ohm resistor from digital VCC to preserve ADC accuracy; per the ATmega640 datasheet, AVCC voltage difference vs VCC should be kept under +/- 0.3 V. Use a separate low-noise reference for AREF if 10-bit ADC precision is required at low signal levels.
The TQFP-100 (14x14 mm, 0.5 mm pitch) requires 4-layer PCB with 0.2 mm via-in-pad or escape routing on inner layers for clean fan-out; do not attempt 2-layer routing with 0.5 mm pitch unless signal count is heavily reduced. Keep crystal traces short (under 10 mm) and shield with a ground guard ring to avoid EMI coupling into ADC. Expose the JTAG pins (PF4-PF7) to a 2x5 0.05" box header for Atmel-ICE / MPLAB Snap debug access.
Do not assume the ATmega640/1280/2560 are pin-compatible with the ATmega128/1281 family - port mappings and timer assignments differ. Always check the JTAG fuse (JTAGEN) is enabled before debugging; AVR Studio will not connect if disabled. The watchdog timer is enabled by default after reset on some lots - clear WDRF in MCUSR before main() to avoid surprise resets. ISP programming requires RESET, SCK, MOSI, MISO pins; ensure these remain accessible in the PCB layout.
Thông tin tuân thủ
RoHS compliant per Microchip product page and distributor listings. REACH and halogen-free status not stated in the verified web data - confirm against the latest Microchip declaration. Not AEC-Q100 qualified; for automotive designs use automotive-qualified ATmega parts.
