AT91SAM7X512B-AUR - 512KB Flash ARM7 MCU 100-LQFP | Microchip
MPN: AT91SAM7X512B-AUR ✗ סוף ייצורAT91SAM7X512B-AUR סקירה
What is an ARM7-based flash microcontroller? An ARM7TDMI MCU is a 32-bit RISC processor with Thumb 16-bit compressed instruction support, integrating flash program memory, SRAM, peripherals, and often connectivity blocks such as Ethernet MAC and CAN on a single die. In the broader taxonomy it sits below ARM Cortex-M parts but above 8/16-bit 8051/AVR devices, occupying the industrial/embedded connectivity tier where deterministic 32-bit performance and integrated wired networking matter more than ultra-low power.
Key features of the AT91SAM7X512B-AUR include an integrated 10/100 Ethernet MAC with MII/RMII interface, a CAN 2.0B controller, a USB 2.0 Full-Speed Device port, an 8-channel 10-bit ADC, four 16-bit timers, an 8-bit RTC, and a peripheral DMA controller that offloads data movement from the core. The embedded flash controller supports in-system programming and bootloader operation from USB or UART.
Architecturally, the SAM7X512B uses a three-layer AHB bus matrix connecting the core, flash controller, peripheral DMA, and a bridge to APB peripherals, allowing parallel bus transactions that improve sustained throughput for Ethernet and USB traffic. The ARM7TDMI core's three-stage pipeline delivers roughly 0.9 MIPS/MHz, giving ~49 Dhrystone MIPS at 55 MHz.
Typical applications include industrial gateways, building-automation controllers, point-of-sale terminals, CAN-based sensor nodes, and embedded Ethernet bridges. Integrated Ethernet plus CAN makes the part especially suitable for protocol-conversion bridges between factory-floor CAN networks and IP backhaul.
When designing with the AT91SAM7X512B-AUR, verify the dual-rail supply (1.8V VDDCORE plus 3.3V VDDIO) and provide bulk decoupling near each power pin. Microchip designates the SAM7X family as not recommended for new designs (NRND); the AT91SAM7XC512B is the pin-compatible successor with optional AES/TDES crypto accelerators.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, including a v3.9-aligned alternatives list of same-brand and cross-brand drop-in options verified for package and pin compatibility.
חלופות תחליף ישיר עבור AT91SAM7X512B-AUR — 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 AT91SAM7X512B-AUR (אותו גורם צורה וטביעת רגל) — שונים ב CAN, Ethernet, Package, Operating Temperature, RoHS Status.
AT91SAM7XC512B-AUR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
AT91SAM7X512B-AU
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AT91SAM7X256C-AUR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
ATSAM3X8E-AU
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LPC2468FBD100
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
STR912FAW44X6
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←AT91SAM7X512B-AUR דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | ARM7TDMI 32-bit RISC |
| Core / System Frequency | Up to 55 MHz |
| Instruction Set | ARM / Thumb (16-bit compressed) |
| Program Flash | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Supply Voltage - Core (VDDCORE) | 1.65 V to 1.95 V (typ. 1.8 V) |
| Supply Voltage - I/O (VDDIO) | 3.0 V to 3.6 V (typ. 3.3 V) |
| Ethernet | 10/100 MAC with MII / RMII interface |
| CAN | CAN 2.0B controller |
| USB | USB 2.0 Full-Speed Device |
| ADC | 8-channel, 10-bit |
| Timers | Four 16-bit timer/counters |
| מארז | 100-pin LQFP, 14x14 mm, 0.5 mm pitch |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40 C to +85 C (industrial) |
| סטטוס RoHS | Compliant |
| Shipping Media | Tape & Reel (AUR suffix) |
| סטטוס מחזור חיים | Not Recommended for New Designs (NRND) |
תצורת פינים של AT91SAM7X512B-AUR
| פין 1 | ADVREF — ADC reference voltage input |
| פין 2 | PA0 — GPIO / peripheral A line 0 |
| פין 3 | PA1 — GPIO / peripheral A line 1 |
| פין 4 | PA2 — GPIO / peripheral A line 2 |
| פין 5 | PA3 — GPIO / peripheral A line 3 |
| פין 6 | PA4 — GPIO / peripheral A line 4 |
| פין 7 | PA5 — GPIO / peripheral A line 5 |
| פין 8 | PA6 — GPIO / peripheral A line 6 |
| פין 9 | PA7 — GPIO / peripheral A line 7 |
| פין 10 | PA8 — GPIO / peripheral A line 8 |
| פין 11 | PA9 — GPIO / peripheral A line 9 |
| פין 12 | PA10 — GPIO / peripheral A line 10 |
| פין 13 | PA11 — GPIO / peripheral A line 11 |
| פין 14 | PA12 — GPIO / peripheral A line 12 |
| פין 15 | PA13 — GPIO / peripheral A line 13 |
| פין 16 | PA14 — GPIO / peripheral A line 14 |
| פין 17 | PA15 — GPIO / peripheral A line 15 |
| פין 18 | PA16 — GPIO / peripheral A line 16 |
| פין 19 | PA17 — GPIO / peripheral A line 17 |
| פין 20 | PA18 — GPIO / peripheral A line 18 |
| פין 21 | PA19 — GPIO / peripheral A line 19 |
| פין 22 | PA20 — GPIO / peripheral A line 20 |
| פין 23 | PA21 — GPIO / peripheral A line 21 |
| פין 24 | PA22 — GPIO / peripheral A line 22 |
| פין 25 | PA23 — GPIO / peripheral A line 23 |
| פין 26 | PA24 — GPIO / peripheral A line 24 |
| פין 27 | PA25 — GPIO / peripheral A line 25 |
| פין 28 | PA26 — GPIO / peripheral A line 26 |
| פין 29 | PA27 — GPIO / peripheral A line 27 |
| פין 30 | PA28 — GPIO / peripheral A line 28 |
| פין 31 | PA29 — GPIO / peripheral A line 29 |
| פין 32 | PA30 — GPIO / peripheral A line 30 |
| פין 33 | PA31 — GPIO / peripheral A line 31 |
| פין 34 | PB0 — GPIO / peripheral B line 0 |
| פין 35 | PB1 — GPIO / peripheral B line 1 |
| פין 36 | PB2 — GPIO / peripheral B line 2 |
| פין 37 | PB3 — GPIO / peripheral B line 3 |
| פין 38 | PB4 — GPIO / peripheral B line 4 |
| פין 39 | PB5 — GPIO / peripheral B line 5 |
| פין 40 | PB6 — GPIO / peripheral B line 6 |
| פין 41 | PB7 — GPIO / peripheral B line 7 |
| פין 42 | PB8 — GPIO / peripheral B line 8 |
| פין 43 | PB9 — GPIO / peripheral B line 9 |
| פין 44 | PB10 — GPIO / peripheral B line 10 |
| פין 45 | PB11 — GPIO / peripheral B line 11 |
| פין 46 | PB12 — GPIO / peripheral B line 12 |
| פין 47 | PB13 — GPIO / peripheral B line 13 |
| פין 48 | PB14 — GPIO / peripheral B line 14 |
| פין 49 | PB15 — GPIO / peripheral B line 15 |
| פין 50 | PB16 — GPIO / peripheral B line 16 |
| פין 51 | PB17 — GPIO / peripheral B line 17 |
| פין 52 | PB18 — GPIO / peripheral B line 18 |
| פין 53 | PB19 — GPIO / peripheral B line 19 |
| פין 54 | PB20 — GPIO / peripheral B line 20 |
| פין 55 | PB21 — GPIO / peripheral B line 21 |
| פין 56 | PB22 — GPIO / peripheral B line 22 |
| פין 57 | PB23 — GPIO / peripheral B line 23 |
| פין 58 | PB24 — GPIO / peripheral B line 24 |
| פין 59 | PB25 — GPIO / peripheral B line 25 |
| פין 60 | PB26 — GPIO / peripheral B line 26 |
| פין 61 | PB27 — GPIO / peripheral B line 27 |
| פין 62 | PB28 — GPIO / peripheral B line 28 |
| פין 63 | PB29 — GPIO / peripheral B line 29 |
| פין 64 | PB30 — GPIO / peripheral B line 30 |
| פין 65 | PB31 — GPIO / peripheral B line 31 |
| פין 66 | VDDCORE — 1.8V core supply |
| פין 67 | VDDIO — 3.3V I/O supply |
| פין 68 | GND — Ground |
| פין 69 | XIN — Main oscillator input (3-20 MHz) |
| פין 70 | XOUT — Main oscillator output |
| פין 71 | NRST — Active-low reset input |
| פין 72 | JTAGSEL — JTAG selection pin |
| פין 73 | TCK — JTAG test clock |
| פין 74 | TDI — JTAG test data in |
| פין 75 | TDO — JTAG test data out |
| פין 76 | TMS — JTAG test mode select |
| פין 77 | ERASE — Flash erase pin |
| פין 78 | DDP — USB D+ line |
| פין 79 | DDM — USB D- line |
| פין 80 | VDDPLL — PLL supply (1.8V) |
| פין 81 | PLLRC — PLL filter RC network |
| פין 82 | CANRX — CAN receive input |
| פין 83 | CANTX — CAN transmit output |
| פין 84 | ERX0 — Ethernet RMII/MII receive data 0 |
| פין 85 | ERX1 — Ethernet RMII/MII receive data 1 |
| פין 86 | ERXER — Ethernet receive error |
| פין 87 | ECRS — Ethernet carrier sense |
| פין 88 | ECOL — Ethernet collision detect |
| פין 89 | ETX0 — Ethernet transmit data 0 |
| פין 90 | ETX1 — Ethernet transmit data 1 |
| פין 91 | ETXEN — Ethernet transmit enable |
| פין 92 | EMDC — Ethernet management clock |
| פין 93 | EMDIO — Ethernet management data |
| פין 94 | MDC — MII management clock (alt) |
| פין 95 | MDIO — MII management data (alt) |
| פין 96 | RXCLK — Ethernet receive clock |
| פין 97 | TXCLK — Ethernet transmit clock |
| פין 98 | VDDIO — 3.3V I/O supply |
| פין 99 | VDDCORE — 1.8V core supply |
| פין 100 | GND — Ground |
יישומים טיפוסיים
AT91SAM7X512B-AUR מתאים עבור 6 יישוםs: Industrial Ethernet-to-CAN Gateway, Building Automation Controller, Point-of-Sale (POS) Terminal, Embedded Web Server / IoT Edge Node, USB Device Firmware Update Station, CAN-Based Sensor Hub.
Industrial Ethernet-to-CAN Gateway
The AT91SAM7X512B-AUR is purpose-built for industrial protocol-conversion gateways bridging Ethernet TCP/IP networks with CAN 2.0B fieldbus segments. Its integrated 10/100 MAC with MII/RMII connects to a standard PHY such as the DP83848, while the on-chip CAN controller pairs with an MCP2551 transceiver for CAN_H/CAN_L physical layer. The 128 KB SRAM buffers full Ethernet frames while the peripheral DMA controller moves data between MAC descriptors and RAM without CPU intervention. Operating from -40 C to +85 C and at industrial 24 VDC rails through a buck regulator, the part sustains wire-speed bridging of Modbus TCP to CANopen in factory automation cells.
מומלץ
Building Automation Controller
In building-automation controllers the AT91SAM7X512B-AUR serves as the supervisory MCU managing HVAC, lighting, and access-control subsystems over Ethernet IP backhaul with local CAN or RS-485 sensor clusters. The 512 KB flash holds BACnet or Modbus stacks alongside application logic, while the 128 KB SRAM keeps TCP/IP and TLS-style session state resident. Four 16-bit timers generate PWM outputs for lighting dimmers and motor-speed control, and the 8-channel 10-bit ADC reads analog temperature and humidity transducers. The integrated USB Full-Speed Device port provides field service and firmware update via a maintenance cable.
מומלץ
Point-of-Sale (POS) Terminal
The AT91SAM7X512B-AUR powers compact point-of-sale terminals requiring Ethernet connectivity for transaction authorization, USB for printer or scanner peripherals, and GPIO for keypad and display interfaces. The ARM7TDMI core at 55 MHz executes encryption routines and TCP/IP stacks with the SRAM acting as a packet buffer, while the 512 KB flash stores the firmware, EMV kernel, and TLS certificates. The dual-rail supply (1.8V core / 3.3V I/O) simplifies power tree design and the industrial temperature range supports retail back-office environments with poor HVAC.
מומלץ
Embedded Web Server / IoT Edge Node
For embedded web-server and IoT-edge applications the AT91SAM7X512B-AUR delivers a single-chip solution combining 10/100 Ethernet, USB, and CAN with sufficient flash and SRAM to run an HTTP server with REST endpoints. The peripheral DMA enables background Ethernet frame handling while the ARM7 core services application logic and CGI handlers. Power consumption is moderate (~30 mA active at 55 MHz) and the LQFP-100 footprint allows reflow assembly on two-layer PCBs, making the part attractive for cost-sensitive edge nodes connecting legacy serial devices to IP networks.
מומלץ
USB Device Firmware Update Station
The integrated USB 2.0 Full-Speed Device port of the AT91SAM7X512B-AUR supports a USB DFU bootloader that allows firmware upgrades without external programming hardware. The on-chip bootloader is invoked at reset by an external pin or by a software command, enumerates as a DFU device, and accepts firmware images over USB. This is widely used in fielded industrial equipment where opening enclosures to access a JTAG header is impractical, and the 512 KB flash supports over-the-air firmware blobs of several hundred kilobytes without external storage.
מומלץ
CAN-Based Sensor Hub
As a CAN-based sensor hub the AT91SAM7X512B-AUR aggregates data from multiple CAN sensor nodes and exposes it via Ethernet to upstream SCADA systems. The CAN 2.0B controller supports standard 11-bit and extended 29-bit identifiers, and the 8-channel 10-bit ADC adds local analog channels for temperature, pressure, or flow sensors. The 128 KB SRAM holds CAN receive FIFOs and Ethernet TX descriptors, allowing the core to remain free for application logic. Industrial -40 C to +85 C operation supports outdoor and factory-floor installations.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור AT91SAM7X512B-AUR — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | AT91SAM7XC512B-AUR | AT91SAM7X512B-AU | AT91SAM7X256C-AUR | ATSAM3X8E-AU | LPC2468FBD100 | STR912FAW44X6 |
|---|---|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | NXP Semiconductors | STMicroelectronics |
| Core | ARM7TDMI 32-bit | ARM7TDMI 32-bit | ARM7TDMI 32-bit | ARM7TDMI 32-bit | Cortex-M3 | ARM7TDMI-S | ARM966E-S |
| Max Frequency | 55 MHz | 55 MHz | 55 MHz | 55 MHz | 84 MHz | 72 MHz | 96 MHz |
| Flash | 512 KB | 512 KB | 512 KB | 256 KB | 512 KB | 512 KB | 512 KB + 32 KB SRAM boot |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 100 KB | 98 KB | 96 KB |
| Ethernet MAC | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (MII/RMII) | 10/100 (RMII) | 10/100 (MII/RMII) | 10/100 (MII) |
| CAN 2.0B | Yes | Yes | Yes | Yes | Yes (2 channels) | Yes (2 channels) | Yes |
| USB | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device + Host | USB 2.0 FS Device + Host + OTG | USB 2.0 FS Device |
| Lifecycle Status | NRND | Active | NRND | NRND | Active | Active | NRND |
מבדילים עיקריים
- Only 100-LQFP drop-in with integrated Ethernet MAC + CAN 2.0B + USB (לעומתLPC2468FBD100)
- Proven ARM7 toolchain with mature peripheral library (לעומתATSAM3X8E-AU)
- Dual-rail architecture isolates analog and digital noise (לעומתSTR912FAW44X6)
הערות תכנון
The AT91SAM7X512B-AUR requires a dual-rail supply: VDDCORE at 1.65-1.95 V (typically 1.8 V) and VDDIO at 3.0-3.6 V (typically 3.3 V). Decouple each VDDIO pin with a 100 nF X7R ceramic placed within 5 mm of the pin, and add a single 10 uF bulk capacitor near the package. The 1.8V core rail should be generated by a low-noise LDO such as MCP1700 from the 3.3V rail, with its own 10 uF + 100 nF decoupling network. Power-rail sequencing is not strictly required but VDDCORE should not exceed VDDIO by more than 0.3 V to avoid latch-up.
Route the Ethernet MII/RMII signals as a matched-length group with 50 ohm controlled impedance to the RJ45 jack, keeping the traces short and away from switching nodes. Place the 25 MHz Ethernet reference clock source close to the PHY and avoid running it parallel to the USB differential pair. The USB D+/D- lines should be 90 ohm differential, with the 1.5 kohm pull-up on D+ placed near the connector. Place the decoupling capacitors for VDDCORE and VDDIO on the same layer as the MCU to minimize via inductance.
Because the AT91SAM7X512B-AUR is designated NRND by Microchip, do not use it for new designs unless the existing firmware is tied to the SAM7 peripheral library or AEC-Q100 re-certification cost is prohibitive. For new designs prefer the AT91SAM7XC512B-AUR (pin-compatible, added AES/TDES) or migrate to the ATSAM3X8E Cortex-M3 successor. Note also that the SAM7X's 3.3V I/O is not 5V tolerant - external level shifters are required when interfacing to 5V logic peripherals.
When using the Ethernet MAC in MII mode at 25 MHz, the ERXCLK/ETXCLK traces must be length-matched to within 50 mils of the data and control signals to avoid timing violations. In RMII mode the 50 MHz reference clock must be distributed with controlled impedance; use a clock buffer if multiple PHY devices share the reference. The CAN bus requires a 120 ohm termination at each end and a common-mode choke for EMI suppression in industrial installations.
מידע על תאימות
RoHS compliant and lead-free per Microchip substance declaration. Not AEC-Q100 qualified - not recommended for automotive safety-relevant applications. Lifecycle status is NRND (Not Recommended for New Designs) per Microchip product page.
