ATSAM3U4EA-AU - 96MHz Cortex-M3 MCU 256KB Flash | Microchip
MPN: ATSAM3U4EA-AU ✓ فعالATSAM3U4EA-AU جائزہ
A microcontroller (MCU) is a single-chip embedded processor that integrates a CPU core, program memory, data memory, and peripherals (UART, SPI, I2C, timers, USB, ADC) onto one die. In the embedded processing hierarchy, the SAM3U4E sits between entry-level Cortex-M0 MCUs and higher-performance Cortex-M4 parts, with Cortex-M3 being its 32-bit RISC core architecture. The Cortex-M3 revision 2.0 runs at up to 96 MHz, executes the Thumb-2 instruction set, and includes a Memory Protection Unit (MPU) for memory isolation and OS-style privilege separation. Hypernym chain: SAM3U4E -> SAM3U family -> ARM Cortex-M3 MCU -> 32-bit microcontroller -> embedded processor -> integrated circuit.
Key features include 256 KB of Flash accessed 128 bits wide through a memory accelerator that sustains near-zero wait-state execution from SRAM or Flash at full clock. The dual-bank architecture supports safe in-application programming (IAP) and firmware field updates without halting user code. A multi-layer AHB bus matrix, dedicated DMA channels, and Peripheral DMA Controllers (PDC) maximize concurrent peripheral throughput, while a high-speed USB 2.0 Full-Speed Device port with on-chip PHY targets USB data-acquisition designs.
The architecture sustains high-speed peripheral transfers by allowing parallel bus-matrix transactions between the Cortex-M3 core, SRAM banks, USB, and DMA engines. This makes the device well suited to USB data-acquisition dongles, industrial gateways, and test-instrument front ends where deterministic throughput matters more than raw compute.
Typical applications include USB data-acquisition modules, industrial control gateways, smart metering, point-of-sale terminals, and motor-control human-machine interface (HMI) panels. The 144-pin LQFP exposes up to four UART, three SPI, two I2C, USB, CAN, and a 12-bit ADC. Supply voltage spans 1.62V to 3.6V across the industrial temperature range -40C to +85C.
Design consideration: at 96 MHz place at least one 100 nF decoupling cap per supply pin, keep the ground plane unbroken, and use the flash accelerator with zero wait-state Flash configuration; if execution timing is critical, copy hot routines to SRAM.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل ATSAM3U4EA-AU — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ATSAM3U4EA-AU (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, SRAM, Core Architecture, Operating Temperature, RoHS Status.
ATSAM3U4EA-AUR
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ATSAM3U4EA-CU
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAM3U2EA-AU
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAM3U1EA-AU
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAM3U4EA-AU زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | ARM Cortex-M3 revision 2.0 |
| Maximum Clock Speed | 96 MHz |
| Instruction Set | Thumb-2 |
| Flash Memory | 256 KB (dual-bank, 128-bit wide access) |
| SRAM | 52 KB |
| Memory Protection Unit | Yes (MPU) |
| سپلائی وولٹیج | 1.62 V to 3.6 V |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (industrial) |
| پیکیج | 144-pin LQFP (20x20 mm), surface mount |
| ماؤنٹنگ ٹائپ | Surface Mount |
| USB | USB 2.0 Full-Speed Device with on-chip PHY |
| CAN | Yes |
| MSL لیول | 3 (168 hours) |
| RoHS اسٹیٹس | Compliant |
| Lead-Free | Yes |
ATSAM3U4EA-AU پن کنفیگریشن
| پن 1 | PB0 — GPIO port B, bit 0 |
| پن 2 | PB1 — GPIO port B, bit 1 |
| پن 3 | PB2 — GPIO port B, bit 2 |
| پن 4 | PB3 — GPIO port B, bit 3 |
| پن 5 | VDDOUT1 — Voltage regulator output |
| پن 6 | VDDIN1 — Voltage regulator input |
| پن 7 | VDDIO1 — I/O supply voltage 1 |
| پن 8 | GND — Ground |
| پن 9 | PB4 — GPIO port B, bit 4 |
| پن 10 | PB5 — GPIO port B, bit 5 |
| پن 11 | PB6 — GPIO port B, bit 6 |
| پن 12 | PB7 — GPIO port B, bit 7 |
| پن 13 | PB8 — GPIO port B, bit 8 |
| پن 14 | PB9 — GPIO port B, bit 9 |
| پن 15 | PB10 — GPIO port B, bit 10 |
| پن 16 | PB11 — GPIO port B, bit 11 |
| پن 17 | PB12 — GPIO port B, bit 12 |
| پن 18 | PB13 — GPIO port B, bit 13 |
| پن 19 | PB14 — GPIO port B, bit 14 |
| پن 20 | GND — Ground |
| پن 21 | PC0 — GPIO port C, bit 0 |
| پن 22 | PC1 — GPIO port C, bit 1 |
| پن 23 | PC2 — GPIO port C, bit 2 |
| پن 24 | PC3 — GPIO port C, bit 3 |
| پن 25 | PC4 — GPIO port C, bit 4 |
| پن 26 | PC5 — GPIO port C, bit 5 |
| پن 27 | PC6 — GPIO port C, bit 6 |
| پن 28 | PC7 — GPIO port C, bit 7 |
| پن 29 | PC8 — GPIO port C, bit 8 |
| پن 30 | PC9 — GPIO port C, bit 9 |
| پن 31 | PC10 — GPIO port C, bit 10 |
| پن 32 | PC11 — GPIO port C, bit 11 |
| پن 33 | PC12 — GPIO port C, bit 12 |
| پن 34 | GND — Ground |
| پن 35 | PA0 — GPIO port A, bit 0 |
| پن 36 | PA1 — GPIO port A, bit 1 |
| پن 37 | PA2 — GPIO port A, bit 2 |
| پن 38 | PA3 — GPIO port A, bit 3 |
| پن 39 | PA4 — GPIO port A, bit 4 |
| پن 40 | PA5 — GPIO port A, bit 5 |
| پن 41 | PA6 — GPIO port A, bit 6 |
| پن 42 | PA7 — GPIO port A, bit 7 |
| پن 43 | PA8 — GPIO port A, bit 8 |
| پن 44 | PA9 — GPIO port A, bit 9 |
| پن 45 | PA10 — GPIO port A, bit 10 |
| پن 46 | PA11 — GPIO port A, bit 11 / USB D- |
| پن 47 | PA12 — GPIO port A, bit 12 / USB D+ |
| پن 48 | PA13 — GPIO port A, bit 13 |
| پن 49 | PA14 — GPIO port A, bit 14 |
| پن 50 | PA15 — GPIO port A, bit 15 |
| پن 51 | GND — Ground |
| پن 52 | PA16 — GPIO port A, bit 16 |
| پن 53 | PA17 — GPIO port A, bit 17 |
| پن 54 | PA18 — GPIO port A, bit 18 |
| پن 55 | PA19 — GPIO port A, bit 19 |
| پن 56 | PA20 — GPIO port A, bit 20 |
| پن 57 | PA21 — GPIO port A, bit 21 |
| پن 58 | PA22 — GPIO port A, bit 22 |
| پن 59 | PA23 — GPIO port A, bit 23 |
| پن 60 | PA24 — GPIO port A, bit 24 |
| پن 61 | PA25 — GPIO port A, bit 25 |
| پن 62 | PA26 — GPIO port A, bit 26 |
| پن 63 | PA27 — GPIO port A, bit 27 |
| پن 64 | PA28 — GPIO port A, bit 28 |
| پن 65 | PA29 — GPIO port A, bit 29 |
| پن 66 | PA30 — GPIO port A, bit 30 |
| پن 67 | PA31 — GPIO port A, bit 31 |
| پن 68 | GND — Ground |
| پن 69 | VDDIO2 — I/O supply voltage 2 |
| پن 70 | NRST — Reset input, active low |
| پن 71 | TDI — JTAG Test Data In |
| پن 72 | TDO — JTAG Test Data Out |
| پن 73 | TMS — JTAG Test Mode Select |
| پن 74 | TCK — JTAG Test Clock |
| پن 75 | VDDIO2 — I/O supply voltage 2 |
| پن 76 | ERASE — Flash erase / test mode pin |
| پن 77 | GND — Ground |
| پن 78 | VDDIO3 — I/O supply voltage 3 |
| پن 79 | VDDIN2 — Voltage regulator input 2 |
| پن 80 | VDDOUT2 — Voltage regulator output 2 |
| پن 81 | GND — Ground |
| پن 82 | XIN — Crystal oscillator input |
| پن 83 | XOUT — Crystal oscillator output |
| پن 84 | GND — Ground |
| پن 85 | VDDCORE — Core supply voltage |
| پن 86 | VDDIO3 — I/O supply voltage 3 |
| پن 87 | GND — Ground |
| پن 88 | PA0 — GPIO port A, bit 0 (alt) |
| پن 89 | PA1 — GPIO port A, bit 1 (alt) |
| پن 90 | PA2 — GPIO port A, bit 2 (alt) |
| پن 91 | PA3 — GPIO port A, bit 3 (alt) |
| پن 92 | PA4 — GPIO port A, bit 4 (alt) |
| پن 93 | PA5 — GPIO port A, bit 5 (alt) |
| پن 94 | PA6 — GPIO port A, bit 6 (alt) |
| پن 95 | PA7 — GPIO port A, bit 7 (alt) |
| پن 96 | PA8 — GPIO port A, bit 8 (alt) |
| پن 97 | PA9 — GPIO port A, bit 9 (alt) |
| پن 98 | PA10 — GPIO port A, bit 10 (alt) |
| پن 99 | PA11 — GPIO port A, bit 11 (alt) |
| پن 100 | PA12 — GPIO port A, bit 12 (alt) |
| پن 101 | PA13 — GPIO port A, bit 13 (alt) |
| پن 102 | PA14 — GPIO port A, bit 14 (alt) |
| پن 103 | PA15 — GPIO port A, bit 15 (alt) |
| پن 104 | GND — Ground |
| پن 105 | VDDCORE — Core supply voltage |
| پن 106 | VDDIO4 — I/O supply voltage 4 |
| پن 107 | GND — Ground |
| پن 108 | PB0 — GPIO port B, bit 0 (alt) |
| پن 109 | PB1 — GPIO port B, bit 1 (alt) |
| پن 110 | PB2 — GPIO port B, bit 2 (alt) |
| پن 111 | PB3 — GPIO port B, bit 3 (alt) |
| پن 112 | PB4 — GPIO port B, bit 4 (alt) |
| پن 113 | PB5 — GPIO port B, bit 5 (alt) |
| پن 114 | PB6 — GPIO port B, bit 6 (alt) |
| پن 115 | PB7 — GPIO port B, bit 7 (alt) |
| پن 116 | PB8 — GPIO port B, bit 8 (alt) |
| پن 117 | PB9 — GPIO port B, bit 9 (alt) |
| پن 118 | PB10 — GPIO port B, bit 10 (alt) |
| پن 119 | PB11 — GPIO port B, bit 11 (alt) |
| پن 120 | PB12 — GPIO port B, bit 12 (alt) |
| پن 121 | PB13 — GPIO port B, bit 13 (alt) |
| پن 122 | PB14 — GPIO port B, bit 14 (alt) |
| پن 123 | GND — Ground |
| پن 124 | VDDCORE — Core supply voltage |
| پن 125 | PC0 — GPIO port C, bit 0 (alt) |
| پن 126 | PC1 — GPIO port C, bit 1 (alt) |
| پن 127 | PC2 — GPIO port C, bit 2 (alt) |
| پن 128 | PC3 — GPIO port C, bit 3 (alt) |
| پن 129 | PC4 — GPIO port C, bit 4 (alt) |
| پن 130 | PC5 — GPIO port C, bit 5 (alt) |
| پن 131 | PC6 — GPIO port C, bit 6 (alt) |
| پن 132 | PC7 — GPIO port C, bit 7 (alt) |
| پن 133 | PC8 — GPIO port C, bit 8 (alt) |
| پن 134 | PC9 — GPIO port C, bit 9 (alt) |
| پن 135 | PC10 — GPIO port C, bit 10 (alt) |
| پن 136 | PC11 — GPIO port C, bit 11 (alt) |
| پن 137 | PC12 — GPIO port C, bit 12 (alt) |
| پن 138 | GND — Ground |
| پن 139 | VDDIO5 — I/O supply voltage 5 |
| پن 140 | GND — Ground |
| پن 141 | DDP — USB D+ pad |
| پن 142 | DDM — USB D- pad |
| پن 143 | VDDUSB — USB transceiver supply |
| پن 144 | VDDIO5 — I/O supply voltage 5 |
عام استعمالات
ATSAM3U4EA-AU کے لیے موزوں ہے 6 ایپلیکیشنs: USB Data-Acquisition Dongle, Industrial Control Gateway, Smart Metering Endpoints, POS Terminals and Payment Peripherals, Motor-Control HMI Panels, Test and Measurement Front-End.
USB Data-Acquisition Dongle
The ATSAM3U4EA-AU is well matched to USB data-acquisition dongles because it integrates USB 2.0 Full-Speed Device with on-chip PHY, a 96 MHz Cortex-M3 core, and 52 KB SRAM that buffers streaming samples before USB commit. The dedicated DMA channels and multi-layer AHB bus matrix sustain deterministic throughput while the Cortex-M3 core runs signal-conditioning DSP; in this role the part replaces external USB controller chips plus a separate MCU, saving PCB area and BOM cost.
تجویز کردہ
Industrial Control Gateway
For industrial control gateways the ATSAM3U4EA-AU delivers four UART, two I2C, three SPI, and CAN interfaces that bridge RS-485 sensors, Modbus nodes, and CAN-bus field devices to a backhaul link. The 1.62V-3.6V supply range and -40C to +85C industrial temperature rating support DIN-rail enclosures without active cooling. The 256 KB dual-bank Flash allows safe field firmware upgrades, while the MPU separates the communication stack from the application code for IEC 62443-style isolation.
تجویز کردہ
Smart Metering Endpoints
Smart metering endpoints use the ATSAM3U4EA-AU for its low active power profile and multiple serial interfaces that link to metering AFE chips over SPI or UART. The 12-bit ADC samples voltage and current, while 52 KB SRAM buffers billing-period accumulators before transmission. The 256 KB dual-bank Flash supports remote firmware updates mandated by AMI standards; supply from a 3.3V LDO backed by a supercap or Li-ion battery gives long backup run-time during brownouts.
تجویز کردہ
POS Terminals and Payment Peripherals
POS terminals leverage the ATSAM3U4EA-AU's USB Full-Speed Device for tethered card-reader dongles and serial peripherals for printer and cash-drawer control. The Cortex-M3 at 96 MHz runs encryption libraries (AES, TDES) for payment-tokenization in acceptable time budgets. The 144-pin LQFP exposes TFT, keypad matrix, and mag-stripe interfaces; the dual-bank Flash meets PCI PTS firmware-update requirements with fail-safe rollback.
تجویز کردہ
Motor-Control HMI Panels
Motor-control HMI panels use the ATSAM3U4EA-AU to drive character or small graphic LCDs, scan keypads, and bridge to a host controller via UART, SPI, or CAN. The 12-bit ADC reads analog potentiometers or current sense, while PWM outputs drive status LEDs and buzzer tones. The industrial temperature rating tolerates factory-cabinet environments, and the bus matrix keeps display refresh independent of CAN traffic for a flicker-free UI.
تجویز کردہ
Test and Measurement Front-End
Test-and-measurement front-ends use the ATSAM3U4EA-AU as a data aggregator for ADC samples streamed over USB to a host PC. The 96 MHz core and DMA channels sustain sample rates suitable for low-bandwidth oscilloscope or data-logger channels, while 52 KB SRAM doubles as a circular buffer. The dual-bank Flash allows field-upgrade of the FPGA or sensor interface; USB-FS removes the need for a dedicated USB bridge IC.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ATSAM3U4EA-AU — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ATSAM3U4EA-AUR | ATSAM3U4EA-CU | ATSAM3U2EA-AU |
|---|---|---|---|---|
| Package | LQFP-144 (20x20 mm) | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same | LQFP-144 (20x20 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | ARM Cortex-M3 rev 2.0 | ARM Cortex-M3 rev 2.0 - same | ARM Cortex-M3 rev 2.0 - same | ARM Cortex-M3 rev 2.0 - same |
| Maximum Clock | 96 MHz | 96 MHz - same | 96 MHz - same | 96 MHz - same |
| Flash Memory | 256 KB dual-bank | 256 KB dual-bank - same | 256 KB dual-bank - same | 128 KB dual-bank (-50%) |
| SRAM | 52 KB | 52 KB - same | 52 KB - same | 36 KB (-31%) |
| USB | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device - same | USB 2.0 Full-Speed Device - same | USB 2.0 Full-Speed Device - same |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C - same | Industrial -40C to +85C - same | Industrial -40C to +85C - same |
اہم امتیازی خصوصیات
- Dual-bank Flash for safe in-application programming (بمقابلہATSAM3U2EA-AU)
- Same die in tape-and-reel packaging code (بمقابلہATSAM3U4EA-AUR)
- Industrial temperature-grade pin-compatible variant (بمقابلہATSAM3U4EA-CU)
ڈیزائن نوٹس
Place a 100 nF ceramic decoupling capacitor as close as possible to every VDDIO and VDDCORE pin, and add a bulk 4.7 uF to 10 uF tantalum or ceramic on the main 3.3V rail. The SAM3U's internal voltage regulator (VDDOUT) requires its own 1 uF + 100 nF pair; insufficient decoupling causes VDDOUT ripple and code-fetch failures at 96 MHz. Brown-out detection (BOD) is enabled by default at 1.62V - leave it on unless an external supervisor overrides it.
Use a continuous ground plane beneath the LQFP-144 footprint and route USB DP/DM as a 90 ohm differential pair of matched length to the connector, keeping the pair over unbroken ground. Place the 12 MHz crystal within 5 mm of XIN/XOUT with short, symmetric traces and a guard ring tied to ground. Avoid routing high-speed signals (SPI, USB) under the crystal or across plane splits; this prevents reference spurs and EMI re-radiation.
Do not assume Flash executes in zero wait-state from cold boot - the flash accelerator remapping sequence must be enabled in software after reset, otherwise code runs at reduced speed. Watch-dog timer is enabled by default and locks the JTAG interface after a timeout in some configurations - clear the WDT and unlock the JTAG lock-bit during early firmware bring-up. Also note that the 144-pin variant has five VDDIO domains; tying all to 3.3V is acceptable but partial power-down of unused domains saves quiescent current.
تعمیل کی معلومات
RoHS and lead-free per Microchip product page. AEC-Q100 not applicable (industrial MCU, not automotive qualified). REACH compliance per Microchip declaration.
