ATSAM4CMS8CA-AU - Dual-Core 120MHz MCU 512KB Flash | Microchip
MPN： ATSAM4CMS8CA-AU ✓ 啟用中ATSAM4CMS8CA-AU 概覽
A microcontroller (MCU) integrates a processor core, program memory, data memory, and peripheral functions onto a single silicon die, serving as the computational heart of an embedded system. Within the power-management hierarchy, the ATSAM4CM family sits in Microchip's high-performance 32-bit MCU portfolio, above the ARM Cortex-M3 based SAM3 and SAM4S families, and is one of the few mainstream MCUs to offer a true dual-core Cortex-M4 configuration for partitioned safety or functional-separation designs.
Key features include a dual-core architecture (one Cortex-M4 with floating-point unit and one Cortex-M4F companion core) for concurrent workloads, 512KB (512K x 8) of Flash program memory, and a rich peripheral set typical of the SAM4CM series. The device operates from a 1.2V core / 3.3V I-O supply domain per FindIC specification data, and is graded for industrial temperature environments.
Technically, the dual Cortex-M4 arrangement allows developers to run a real-time control task on one core while the second core handles communications, user interface, or safety-monitoring firmware, reducing the need for external co-processors. The ARM Cortex-M4 with FPU executes DSP instructions natively, supporting motor control, digital filtering, and sensor-fusion workloads at 120 MHz.
Typical applications include industrial automation controllers, motor drives, battery-management and power-conversion systems, and communication gateways where deterministic dual-core partitioning is valuable.
When designing with this device, verify the core and I/O supply sequencing and allocate Flash headroom for dual-core firmware images, since the 512KB array is shared across both cores.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, adding selection value for engineers comparing SAM4CM options.
直接替換替代品，適用於 ATSAM4CMS8CA-AU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAM4CMS8CA-AU （相同外形與佔位） — 差異在於 RoHS Status, Core Processor, Package, Series, Flash Memory.
ATSAM4CMP8CA-AU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM4CMP16CA-AU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM4CMS16CA-AU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAM4CMP8CB-AUR
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4S16CA-AU
✅ 直接替換聯絡詢價
查看資料表 →ATSAM4CMS8CA-AU 最大額定值與電氣特性
| Core Processor | ARM Cortex-M4/M4F dual-core |
| Core Size | 32-bit |
| 最大時脈頻率 | 120 MHz |
| Program Memory Size | 512KB (512K x 8) Flash |
| RAM Size | 128KB SRAM |
| Series | SAM4CM |
| 供應電壓 | 1.2V core / 3.3V I/O |
| 封裝 | 100-LQFP (14x14 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (industrial grade) |
| Packaging | Tray |
| RoHS 狀態 | Compliant (LQFP GREEN IND per Mouser) |
| Terminal Form | Gull Wing |
| Package Code | LFQFP, Square |
ATSAM4CMS8CA-AU lfqfp, square 腳位配置指南
ATSAM4CMS8CA-AU（lfqfp, square 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATSAM4CMS8CA-AU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATSAM4CMS8CA-AU 適用於 6 應用s: Industrial Motor Control, Industrial Automation Controllers, Battery Management Systems, Communication Gateways, Power Conversion and Inverters, Sensor Fusion and Condition Monitoring.
Industrial Motor Control
The ATSAM4CMS8CA-AU fits motor-drive applications because its 120 MHz dual-core ARM Cortex-M4/M4F executes field-oriented control with hardware floating-point and DSP instructions on one core while a second core independently handles fieldbus communications or safety supervision. The 512KB Flash and 128KB SRAM hold both the control algorithm and a communication stack concurrently, and the 3.3V I/O domain interfaces directly with gate-driver and encoder circuitry. Partitioning control and communications across two cores removes scheduler-induced jitter, improving current-loop bandwidth determinism compared with a single-core MCU running both tasks.
推薦
Industrial Automation Controllers
In PLC I/O modules and automation controllers, the ATSAM4CMS8CA-AU provides dual-core concurrency: one Cortex-M4 runs the deterministic scan/processing loop while the second core services industrial protocols and diagnostics. Its 512KB Flash accommodates firmware plus protocol stacks, and 128KB SRAM buffers process data. The industrial temperature grade and 100-LQFP (14x14 mm) gull-wing package suit dense control boards with standard SMT assembly. Designers benefit from hardware isolation between the real-time layer and the communication layer, reducing certification complexity for systems that require partitioned execution domains.
推薦
Battery Management Systems
Battery-management electronics benefit from the ATSAM4CMS8CA-AU's dual-core split: one core runs periodic cell-voltage/current sampling and state-of-charge estimation with FPU-assisted math at 120 MHz, while the second core manages CAN communications and failsafe cutoff logic independently. The 512KB Flash retains calibration tables and logging code, and 128KB SRAM supports rolling data logs. Because BMS firmware typically requires segregation between measurement-critical and communication tasks, the hardware dual-core architecture of the SAM4CM series maps naturally onto this safety-oriented software structure.
推薦
Communication Gateways
Gateway products bridging CAN, RS-485, and Ethernet traffic use the ATSAM4CMS8CA-AU's second Cortex-M4F core to run the protocol stack while the first core handles packet filtering and determinism-sensitive forwarding. The 512KB Flash supports multi-protocol images with room for field upgrades, and 128KB SRAM provides frame buffering. The 100-pin LQFP offers sufficient I/O for multiple transceiver interfaces, and the 3.3V domain connects directly to standard PHY and transceiver devices, minimizing external level-shifting logic in industrial network equipment.
推薦
Power Conversion and Inverters
Solar inverters and UPS systems require tight control-loop timing plus supervisory intelligence, matching the ATSAM4CMS8CA-AU's strengths. The 120 MHz Cortex-M4 with FPU executes PWM update and digital control loops with DSP instructions, while the second core implements MPPT algorithms, logging, and user interfaces without perturbing loop timing. The 512KB Flash and 128KB SRAM comfortably host both firmware layers, and industrial temperature qualification suits outdoor power-electronics enclosures. The 100-LQFP gull-wing package simplifies assembly on power-control PCBs alongside standard SMT processes.
推薦
Sensor Fusion and Condition Monitoring
Predictive-maintenance and condition-monitoring nodes use the ATSAM4CMS8CA-AU to fuse accelerometer, temperature, and current sensor data. The FPU-equipped core runs digital filtering and FFT analysis on vibration streams using Cortex-M4 DSP instructions at 120 MHz, while the second core transmits processed results over industrial networks. With 512KB Flash for feature-extraction code and 128KB SRAM for time-series buffers, the device performs edge analytics locally. The dual-core split guarantees that heavy signal processing never delays network responsiveness, which is critical in distributed monitoring deployments.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAM4CMS8CA-AU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAM4CMP8CA-AU | ATSAM4CMP16CA-AU | ATSAM4CMS16CA-AU | ATSAM4CMP8CB-AUR | ATSAM4S16CA-AU |
|---|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | Dual-core ARM Cortex-M4/M4F | SAM4CM companion variant | SAM4CM companion variant | Dual-core ARM Cortex-M4/M4F | SAM4CM companion variant | Single-core ARM Cortex-M4 |
| Max Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash Memory | 512KB | 512KB | 1MB | 1MB | 512KB | 1MB |
| Supply Voltage | 1.2V core / 3.3V I/O | 1.2V / 3.3V domains | 1.2V / 3.3V domains | 1.2V / 3.3V domains | 1.2V core (per Utmel) | 3.3V single domain |
| Packaging | Tray | Tray | Tray | Tray | Tape & Reel | Tray |
主要差異化特點
- True dual-core Cortex-M4/M4F architecture (對比ATSAM4S16CA-AU)
- Cost-optimized 512KB Flash point in the SAM4CM family (對比ATSAM4CMS16CA-AU)
- Same-footprint migration path across the whole SAM4CM family (對比ATSAM4CMP8CA-AU)
設計說明
The ATSAM4CMS8CA-AU uses separate 1.2V core and 3.3V I/O supply domains. Provide independent decoupling for each domain: place 100 nF ceramic capacitors at every VDDIO and VDDCORE pin pair plus at least one 4.7 uF bulk capacitor per rail. Verify power-up sequencing per the SAM4CM datasheet, since the internal regulator requires the correct ramp profile. Estimated: a 120 MHz dual-core run consumes on the order of tens of mA per core domain, so size the 1.2V rail regulator accordingly with margin for peak execution modes.
Use a solid ground plane under the 100-LQFP (14x14 mm, 0.5 mm pitch) footprint and keep high-speed clock traces (main crystal, PLL outputs) short and referenced to ground. Fan out the 100 pins with via-in-park or dogbone patterns to manage the 0.5 mm pitch breakout on two to four layers. Route analog references away from switching I/O. Decouple every other pin on the gull-wing rows to minimize ground bounce in dual-core concurrent operation.
The 512KB Flash and 128KB SRAM are shared by both Cortex-M4 cores. Define a fixed memory partition map at link time for each core image, and use hardware semaphore or inter-processor-communication peripherals for shared-resource access; ad-hoc shared-variable access causes intermittent corruption that is difficult to debug. Also confirm variant compatibility before substituting P-series and C-series parts: peripheral allocation differs between SAM4CM companion and C variants even within the same 100-LQFP footprint.
合規資訊
Mouser lists the part as LQFP GREEN IND, indicating green (halogen-reduced per vendor definition) industrial packaging. REACH and conflict-minerals status not stated in provided data.