ATMEGA128-16MUR - 8-bit AVR MCU 128KB 16MHz | Microchip
MPN: ATMEGA128-16MUR ✓ Hoạt độngATMEGA128-16MUR Tóm tắt
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, making it a core embedded processing element within the broader power management and control hierarchy of industrial, consumer, and automotive electronics. The AVR family from Microchip is one of the most widely deployed MCU architectures in embedded systems.
Key features include 131 powerful instructions with mostly single-cycle execution delivering up to 16 MIPS throughput at 16 MHz, an 8-channel 10-bit ADC for analog sensing, a JTAG interface for on-chip debugging and boundary scan, two 8-bit and two 16-bit timers with PWM capability, and dual programmable serial USARTs plus SPI and TWI (I2C) interfaces. Six sleep modes allow aggressive power optimization in battery-conscious designs.
Architecturally, the ATmega128 offers full static operation, 64 KB optional external memory space, and a byte-oriented two-wire serial interface. The 128 KB flash supports 10,000 write/erase cycles, the EEPROM supports 100,000 cycles, and ISP (In-System Programming) via SPI or boot-loader programming via USART simplifies field updates. JTAG provides hardware breakpoint and single-observability debugging.
Typical applications include industrial automation control, sensor data acquisition using the 10-bit ADC, embedded motor and actuator control with hardware PWM, and legacy ATmega103 designs, since the ATmega128 is 100% pin compatible with the ATmega103 and provides an ATmega103 compatibility mode.
A key design consideration is supply voltage: the -16MUR speed grade requires 4.5 V to 5.5 V for 16 MHz operation; for 3 V designs, use the 8 MHz ATmega128V variants instead. Decouple the multiple VCC/GND pin pairs with 0.1 uF ceramics.
This page synthesizes distributor pricing, drop-in alternatives, full 64-pin pinout, and practical design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA128-16MUR — 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 ATMEGA128-16MUR (cùng hình factor và footprint) — khác nhau ở Package, Instructions, Timers/Counters, ADC Channels, Supply Voltage Range.
ATMEGA128A-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA128A-MUR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA1281-16MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA64A-MU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATMEGA128-16MUR Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit AVR RISC |
| Core Size | 8-bit |
| Tần số xung maksimum | 16 MHz |
| Flash Memory | 128 KB (64K x 16) |
| SRAM | 4 KB |
| EEPROM | 4 KB |
| Supply Voltage Range | 4.5 V to 5.5 V |
| ADC Channels | 8 channels |
| ADC Resolution | 10-bit |
| Timers/Counters | 2 x 8-bit, 2 x 16-bit |
| PWM Channels | Yes (hardware PWM) |
| Communication Interfaces | 2 x USART, SPI, TWI (I2C) |
| JTAG Debug | Yes (on-chip debug and boundary scan) |
| I/O Pins | 53 |
| External Memory Support | Up to 64 KB |
| Sleep Modes | 6 |
| Hộp | 64-VFQFN (9x9 mm) exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Throughput | Up to 16 MIPS |
Cấu hình chân ATMEGA128-16MUR
| Chân 1 | PE0 (RXD0/PDI) — Port E bit 0 / USART0 receive |
| Chân 2 | PE1 (TXD0/PDO) — Port E bit 1 / USART0 transmit |
| Chân 3 | PE2 (XCK0/AIN0) — Port E bit 2 / USART0 clock / Analog comparator input 0 |
| Chân 4 | PE3 (OC3A/AIN1) — Port E bit 3 / Timer3 output compare A / Analog comparator input 1 |
| Chân 5 | PE4 (OC3B/INT4) — Port E bit 4 / Timer3 output compare B / External interrupt 4 |
| Chân 6 | PE5 (OC3C/INT5) — Port E bit 5 / Timer3 output compare C / External interrupt 5 |
| Chân 7 | PE6 (T3/INT6) — Port E bit 6 / Timer3 clock input / External interrupt 6 |
| Chân 8 | PE7 (ICP3/INT7) — Port E bit 7 / Timer3 input capture / External interrupt 7 |
| Chân 9 | VCC — Digital supply voltage |
| Chân 10 | GND — Ground |
| Chân 11 | PG0 (WR) — Port G bit 0 / External memory write strobe |
| Chân 12 | PG1 (RD) — Port G bit 1 / External memory read strobe |
| Chân 13 | PC0 (A8) — Port C bit 0 / External memory address line 8 |
| Chân 14 | PC1 (A9) — Port C bit 1 / External memory address line 9 |
| Chân 15 | PC2 (A10) — Port C bit 2 / External memory address line 10 |
| Chân 16 | PC3 (A11) — Port C bit 3 / External memory address line 11 |
| Chân 17 | PC4 (A12) — Port C bit 4 / External memory address line 12 |
| Chân 18 | PC5 (A13) — Port C bit 5 / External memory address line 13 |
| Chân 19 | PC6 (A14) — Port C bit 6 / External memory address line 14 |
| Chân 20 | PC7 (A15) — Port C bit 7 / External memory address line 15 |
| Chân 21 | PG2 (ALE) — Port G bit 2 / External memory address latch enable |
| Chân 22 | VCC — Digital supply voltage |
| Chân 23 | GND — Ground |
| Chân 24 | VCC — Digital supply voltage |
| Chân 25 | GND — Ground |
| Chân 26 | PB0 (SS) — Port B bit 0 / SPI slave select |
| Chân 27 | PB1 (SCK) — Port B bit 1 / SPI serial clock |
| Chân 28 | PB2 (MOSI) — Port B bit 2 / SPI master output |
| Chân 29 | PB3 (MISO) — Port B bit 3 / SPI master input |
| Chân 30 | PB4 (OC0/PWM0) — Port B bit 4 / Timer0 output compare |
| Chân 31 | PB5 (OC1A) — Port B bit 5 / Timer1 output compare A |
| Chân 32 | PB6 (OC1B) — Port B bit 6 / Timer1 output compare B |
| Chân 33 | PB7 (OC2/OC1C) — Port B bit 7 / Timer2 output compare / Timer1 output compare C |
| Chân 34 | PF0 (ADC0) — Port F bit 0 / ADC input 0 |
| Chân 35 | PF1 (ADC1) — Port F bit 1 / ADC input 1 |
| Chân 36 | PF2 (ADC2) — Port F bit 2 / ADC input 2 |
| Chân 37 | PF3 (ADC3) — Port F bit 3 / ADC input 3 |
| Chân 38 | PF4 (ADC4/TCK) — Port F bit 4 / ADC input 4 / JTAG test clock |
| Chân 39 | PF5 (ADC5/TMS) — Port F bit 5 / ADC input 5 / JTAG test mode select |
| Chân 40 | PF6 (ADC6/TDO) — Port F bit 6 / ADC input 6 / JTAG test data output |
| Chân 41 | PF7 (ADC7/TDI) — Port F bit 7 / ADC input 7 / JTAG test data input |
| Chân 42 | AREF — ADC reference voltage |
| Chân 43 | GND — Ground |
| Chân 44 | AVCC — Analog supply for ADC |
| Chân 45 | PA0 (AD0) — Port A bit 0 / External memory data/address line 0 |
| Chân 46 | PA1 (AD1) — Port A bit 1 / External memory data/address line 1 |
| Chân 47 | PA2 (AD2) — Port A bit 2 / External memory data/address line 2 |
| Chân 48 | PA3 (AD3) — Port A bit 3 / External memory data/address line 3 |
| Chân 49 | PA4 (AD4) — Port A bit 4 / External memory data/address line 4 |
| Chân 50 | PA5 (AD5) — Port A bit 5 / External memory data/address line 5 |
| Chân 51 | PA6 (AD6) — Port A bit 6 / External memory data/address line 6 |
| Chân 52 | PA7 (AD7) — Port A bit 7 / External memory data/address line 7 |
| Chân 53 | PG3 (TOSC2) — Port G bit 3 / Timer oscillator output |
| Chân 54 | PG4 (TOSC1) — Port G bit 4 / Timer oscillator input |
| Chân 55 | RESET — Reset input (active low) |
| Chân 56 | VCC — Digital supply voltage |
| Chân 57 | GND — Ground |
| Chân 58 | XTAL2 — Crystal oscillator output |
| Chân 59 | XTAL1 — Crystal oscillator input |
| Chân 60 | PD0 (SCL/INT0) — Port D bit 0 / TWI clock / External interrupt 0 |
| Chân 61 | PD1 (SDA/INT1) — Port D bit 1 / TWI data / External interrupt 1 |
| Chân 62 | PD2 (TXD1/INT2) — Port D bit 2 / USART1 transmit / External interrupt 2 |
| Chân 63 | PD3 (RXD1/INT3) — Port D bit 3 / USART1 receive / External interrupt 3 |
| Chân 64 | PD4 (ICP1) — Port D bit 4 / Timer1 input capture |
Ứng dụng tiêu biểu
ATMEGA128-16MUR phù hợp cho 6 Áp dụngs: Industrial Automation Control, Analog Sensor Data Acquisition, Motor Control with PWM, Embedded Communication Nodes, ATmega103 Legacy Migration, Consumer and Battery-Powered Devices.
Industrial Automation Control
The ATMEGA128-16MUR suits industrial controllers because its 53 I/O lines, dual USARTs, and hardware PWM let one MCU drive relays, read sensors, and communicate on RS-485 networks simultaneously. The 16 MHz AVR core executes most of its 131 instructions in a single cycle, delivering 16 MIPS for deterministic control loops. Its 128 KB flash accommodates large ladder-logic interpreters or communication stacks, while the 4 KB EEPROM stores calibration data and counters that survive power loss. JTAG debugging shortens commissioning cycles on factory floors. Wide 4.5 V to 5.5 V tolerance tolerates noisy industrial 5 V rails with regulator sag.
Được đề xuất
Analog Sensor Data Acquisition
The 8-channel 10-bit ADC of the ATMEGA128-16MUR directly digitizes thermistors, potentiometers, and pressure sensors without an external converter. With AREF and AVCC pins available for a precision reference, achievable resolution is roughly 5 mV per LSB on a 5 V rail, sufficient for threshold monitoring and trend logging. Six sleep modes allow duty-cycled sampling that stretches battery or energy-harvesting budgets, waking via interrupt to burst-sample and transmit over TWI or SPI. The 4 KB EEPROM locally stores calibration coefficients per channel. This removes a dedicated ADC chip from the BOM in cost-sensitive multi-sensor nodes.
Được đề xuất
Motor Control with PWM
With two 8-bit and two 16-bit timers generating hardware PWM, the ATMEGA128-16MUR drives DC and stepper motor drivers without CPU-intensive software timing. The 16 MHz clock yields PWM resolutions up to 16-bit at low frequencies or fast 20 kHz control frequencies for inaudible motor operation. External memory bus signals (ALE, RD, WR on Ports C/G) enable expansion for encoders or display interfaces, and input-capture pins measure encoder feedback precisely. The 5 V supply directly interfaces classic H-bridge driver logic thresholds. JTAG allows single-stepping commutation firmware during drive bring-up and fault analysis.
Được đề xuất
Embedded Communication Nodes
The ATMEGA128-16MUR integrates two USARTs plus SPI and TWI, allowing a single node to bridge a field bus, a local peripheral bus, and a debugging console concurrently. At 16 MHz, USART rates up to 1 Mbps support Modbus and proprietary protocols, while SPI clocks to fosc/2 (8 MHz) for fast displays or flash logging. The 128 KB flash stores protocol stacks and buffering code with room for boot-loader-based field updates over the serial link, extending deployed product life. This makes the part common in gateways, metering heads, and legacy telemetry equipment still produced today.
Được đề xuất
ATmega103 Legacy Migration
The ATmega128 is 100% pin compatible with the ATmega103 and offers an ATmega103 compatibility mode via fuse setting, which preserves the original register map and memory map for code reuse. Boards designed around the ATmega103 can adopt the ATMEGA128-16MUR without PCB respin, immediately gaining 128 KB flash (versus 128 KB on ATmega103 but with extended features), extra timers, TWI, and dual USARTs when running in native mode. This makes it the standard upgrade path for maintaining discontinued ATmega103-based industrial and medical devices while preserving firmware investment and approvals.
Được đề xuất
Consumer and Battery-Powered Devices
Although the -16MUR grade targets 5 V systems, the ATMEGA128 architecture's six sleep modes - including power-down at microamp levels and idle modes with timers running - let designers aggressively duty-cycle consumer appliances, chargers, and accessories. Idle mode keeps the ADC and one USART alive for wake-on-event designs; power-save wakes on timer for periodic tasks. Combined with in-system boot-loader programming via the USART, products can receive firmware updates in the field from a 5 V USB-style supply. Cost-sensitive volume products benefit from the mature, multi-source-supported AVR toolchain.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA128-16MUR — 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 | ATMEGA128A-MU | ATMEGA128A-MUR | ATMEGA1281-16MUR | ATMEGA64A-MU |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) MLF | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB | 2 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Pinout Compatibility | Reference (ATmega128 pinout) | Pin-to-pin identical | Pin-to-pin identical | Same pin count, partial function differences | Pin-to-pin identical |
| Architecture / Family | 8-bit AVR ATmega128 | 8-bit AVR ATmega128A (die-shrink) | 8-bit AVR ATmega128A (die-shrink) | 8-bit AVR ATmega1281 | 8-bit AVR ATmega64A |
Bảo phân biệt quan trọng
- Maximum code space in the ATmega64/128 QFN pin-compatible family (vsATMEGA64A-MU)
- Drop-in die-shrink continuity path (vsATMEGA128A-MU)
- 100% ATmega103 pin compatibility with compatibility mode (vsATMEGA1281-16MUR)
Ghi chú thiết kế
Decouple every VCC pin pair individually: the 64-QFN ATMEGA128-16MUR has multiple VCC/GND pairs (pins 9/10, 22/23, 24/25, 56/57). Place a 0.1 uF ceramic capacitor within 2 mm of each VCC pin and add a 10 uF bulk capacitor near the supply entry. Connect AVCC (pin 44) to VCC through a low-pass LC filter (10 uH + 0.1 uF) when ADC accuracy matters, and tie AREF to a clean reference with a 100 nF capacitor when using the external reference mode.
The exposed pad on the 64-QFN (9x9 mm) package should be soldered to a grounded thermal array on the PCB. It provides the primary GND connection and improves heat spreading; a poorly soldered exposed pad is a common cause of intermittent resets and degraded ground integrity. Use an array of 4x4 to 5x5 vias under the pad filled or tented per IPC guidance, connected to the internal ground plane.
Three frequent design errors: (1) running at 16 MHz below 4.5 V violates the speed/voltage derating curve - use the V speed grade parts for 3 V operation; (2) forgetting that PF4-PF7 are shared with JTAG - if JTAG is enabled by default, those ADC channels and I/O are unavailable; disable JTAGEN via fuse or use the JTD bit for ADC-heavy designs; (3) in ATmega103 compatibility mode, extended features (TWI, second USART, additional timers) are inaccessible - verify the M103C fuse is cleared for native mode.
Keep XTAL1/XTAL2 crystal traces short (under 10 mm) and guarded by ground, with load capacitors chosen per the crystal specification (typically 12-22 pF for 16 MHz fundamental crystals). For external memory bus operation at full 16 MHz, match trace lengths on the multiplexed AD0-AD7 bus and add series termination (22-33 ohm) on ALE to control ringing on expansion designs.
Thông tin tuân thủ
RoHS compliance and lead-free status per distributor listings for the ATMEGA128-16MUR. REACH, halogen-free, and conflict-minerals declarations should be confirmed from Microchip's certificate of conformance for the specific date code.
