ATSAM4S8CA-CFUR - SAM4S Cortex-M4 512KB Flash MCU | Microchip
MPN: ATSAM4S8CA-CFUR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.38 | $6.38 |
| 10 | $5.74 | $57.40 |
| 100 | $5.16 | $516.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.95 | $3,950.00 |
ATSAM4S8CA-CFUR Overview
An ARM Cortex-M4 microcontroller is a high-performance 32-bit RISC processor core designed for embedded systems. The Cortex-M4 extends the Cortex-M3 with single-precision floating-point unit (FPU) instructions and DSP extensions, positioning it in the product hierarchy as follows: Cortex-M4 -> ARM Cortex-M family -> 32-bit MCU -> embedded microcontroller -> semiconductor IC. Microchip positions the SAM4S family as an ultra-low-power, performance-oriented extension of its SAM ARM portfolio, with on-chip peripherals including USB 2.0 Full-Speed, up to five USARTs, hardware crypto accelerator (AES, TRNG), and a 12-bit ADC with up to 16 channels.
Key differentiating specifications of the ATSAM4S8CA-CFUR include 120 MHz maximum CPU clock, 512KB Flash program memory organized as 512K x 8, 128KB SRAM, VFBGA-100 package (7x7 mm), 1.62V-3.6V wide supply range, and an integrated FPU plus DSP extensions. The -CFUR suffix decodes as industrial temperature range (C), 100-ball VFBGA (F), tape-and-reel packaging (UR).
The architecture pairs a Cortex-M4 core with Microchip's proprietary peripheral DMA (PDC), a high-speed bus matrix, and a peripheral event system for low-latency inter-module signaling. The integrated FPU accelerates floating-point math, while DSP extensions enable efficient signal-processing kernels such as FIR filters and FFTs without CPU stalls.
Typical applications include industrial HMI panels, smart energy metering, USB-connected peripherals, IoT edge nodes, building automation, and motor-control front-ends. The 128KB SRAM supports real-time stacks for RTOS-based designs (FreeRTOS, Micrium), making the part well suited for connected appliances and POS terminals.
A key design consideration for VFBGA-100 is PCB escape routing. With a 7x7 mm body and 0.65 mm ball pitch, designers should plan for laser-drilled microvias or via-in-pad and target matched-length signal groups for the high-speed USB DP/DM traces; XAIPART recommends the SAM4S family reference designs in the datasheet as starting points for new boards.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical PCB-layout notes not found in the standard manufacturer datasheet, providing additional selection context for engineers comparing -CFUR variants against the wider SAM4S portfolio.
Drop-in alternatives for ATSAM4S8CA-CFUR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAM4S8CA-CFUR (same form factor and footprint) — differing in Package, ADC, USB, Operating Temperature, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4S8CA-CFU
✅ Drop-In✓ In Stock
$5.2 / Unit
View Datasheet →ATSAM4S8CA-CFN
✅ Drop-In✓ In Stock
$4.8 / Unit
View Datasheet →ATSAM4S16CA-CFUR
✅ Drop-In✓ In Stock
$5.5 / Unit
View Datasheet →ATSAM4S8CA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.74 / Unit
View Datasheet →ATSAM4S16CA-CFN
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.98 / Unit
View Datasheet →ATSAM4S16CA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.55 / Unit
View Datasheet →ATSAM4S8CA-CFUR Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4 |
| Core Features | FPU + DSP extensions, single-precision floating point |
| Maximum CPU Clock | 120 MHz |
| Program Memory (Flash) | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Operating Voltage (VDD) | 1.62 V to 3.6 V |
| Core Voltage Domains | 1.2 V and 3.3 V |
| Package | 100-ball VFBGA (7x7 mm) |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Mounting Type | Surface Mount |
| ADC | 1 x 12-bit ADC, up to 16 channels |
| USB | USB 2.0 Full-Speed device/host |
| Communication Peripherals | Up to 5x USART, 3x SPI, 4x TWI (I2C) |
| Crypto / Security | AES hardware accelerator, TRNG |
| DMA | Peripheral DMA Controller (PDC), 8 channels |
| Timer/Counter | TC channels for capture/compare/PWM |
| MSL Level | MSL3 |
| RoHS Status | Compliant |
ATSAM4S8CA-CFUR 100-ball vfbga (7x7 mm) Pin Configuration Guide
Pin configuration for ATSAM4S8CA-CFUR (100-ball vfbga (7x7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAM4S8CA-CFUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4S8CA-CFUR is suitable for 7 applications: Industrial HMI Touch Panels, Smart Energy Metering, USB Peripherals and HID Devices, IoT Edge Sensor Hubs, Building Automation Controllers, Motor Control Front-Ends, POS and Payment Terminals.
Industrial HMI Touch Panels
The ATSAM4S8CA-CFUR fits industrial HMI touch panels because its 120 MHz Cortex-M4 with FPU drives TFT refresh, USB-HID touch input, and on-screen DSP processing in one core. With 512KB Flash and 128KB SRAM it can host FreeRTOS plus a graphics stack and still leave room for secure boot or OTA staging, while the 1.62V-3.6V supply simplifies power sequencing from 3.3V industrial rails. The integrated 12-bit ADC samples backlight and ambient-light sensors for automatic brightness control without an external ADC.
Recommended
Smart Energy Metering
Smart energy meters benefit from the ATSAM4S8CA-CFUR's DSP extensions, which accelerate current and voltage channel FIR filtering for harmonic analysis. The 512KB Flash stores metering firmware plus calibration tables, and the 128KB SRAM buffers waveform samples for per-cycle RMS computation. Hardware AES plus TRNG support secure command authentication for AMR and AMI protocols, and the 1.62V-3.6V supply allows the MCU to share a 3.3V rail with the metrology front-end.
Recommended
USB Peripherals and HID Devices
The ATSAM4S8CA-CFUR's integrated USB 2.0 Full-Speed controller with on-chip transceiver makes it an excellent fit for USB HID, CDC, and vendor-class peripherals. Peripheral DMA moves endpoint data without CPU intervention, leaving the Cortex-M4 free for protocol stacks and DSP audio filtering. With 512KB Flash there is ample room for combined HID + vendor-class firmware plus a USB bootloader, all operating from a USB-supplied 3.3V rail.
Recommended
IoT Edge Sensor Hubs
IoT edge sensor hubs use the ATSAM4S8CA-CFUR to aggregate I2C, SPI, and UART sensors, run local decision logic, and push results over Wi-Fi or sub-GHz wireless co-processors. The Cortex-M4 with FPU executes floating-point sensor fusion algorithms (Kalman, complementary filters) and the 128KB SRAM supports 10+ stack frames per RTOS task. Operating from 1.62V-3.6V, the part runs from a single Li-Ion or 3.3V coin-cell-derived rail for years of battery life.
Recommended
Building Automation Controllers
Building automation controllers rely on the ATSAM4S8CA-CFUR to run BACnet, Modbus, or KNX stacks and to drive LCD or segment displays with the integrated peripheral DMA. Five USARTs simplify multi-bridge connectivity, and the 12-bit ADC reads 4-20 mA or 0-10 V sensor inputs without external analog front-ends. Industrial -40C to +85C temperature range allows deployment in unconditioned mechanical rooms, where heat and humidity stress consumer-grade parts.
Recommended
Motor Control Front-Ends
The ATSAM4S8CA-CFUR drives BLDC, FOC, and stepper motor control loops using its Cortex-M4 with DSP extensions and high-speed PWM timer/counter channels. Floating-point unit accelerates Park/Clarke transforms in FOC without integer emulation, while the 12-bit ADC samples phase currents synchronously to the PWM. Industrial -40C to +85C temperature range and 3.6V absolute max VDD are sufficient for 24V industrial motion systems with proper conditioning.
Recommended
POS and Payment Terminals
POS and payment terminals benefit from the ATSAM4S8CA-CFUR's hardware AES plus TRNG for secure card data handling, and from USB Full-Speed for NFC or reader boards. With 512KB Flash the part fits a TLS stack plus a small RTOS, and the VFBGA-100 footprint keeps the BOM area small for compact terminal designs. The industrial temperature grade covers retail and outdoor-use cases without re-bom for hot/cold store environments.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4S8CA-CFUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S8CA-CFU | ATSAM4S8CA-CFN | ATSAM4S16CA-CFUR | ATSAM4S8CA-AU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-VFBGA (7x7) | 100-VFBGA (7x7) - same | 100-VFBGA (7x7) - same | 100-VFBGA (7x7) - same | 100-VFBGA (7x7) - same |
| Core | ARM Cortex-M4 + FPU | ARM Cortex-M4 + FPU | ARM Cortex-M4 + FPU | ARM Cortex-M4 + FPU | |
| Max CPU Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | |
| Flash | 512 KB | 512 KB | 1 MB | 512 KB | |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | |
| Operating Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C | |
| Packaging Form | Tape & Reel | Tray | Tape & Reel | Tray |
Key Differentiators
- Doubles Flash with same footprint for OTA-friendly designs (vs ATSAM4S8CA-CFU)
- Industrial temperature grade for harsh environments (vs ATSAM4N8CA-CFUR)
- On-chip USB FS device/host with integrated PHY (vs ATSAM4S16CA-AU)
Design Notes
The 100-ball VFBGA-100 footprint at 0.65 mm pitch requires laser-drilled microvias or via-in-pad for inner-row escape. Microchip reference designs recommend stacked microvia stacks on inner-row balls, with the outer ring routed on the top layer. Maintain a continuous ground plane beneath the package to control return-current paths and meet 85-ohm differential impedance for USB DP/DM traces if USB is enabled.
Estimated: at 120 MHz active core and 1.2 V internal rail, the ATSAM4S8CA-CFUR draws roughly 30 mA active, dissipating about 36 mW. With VFBGA-100 thermal resistance of approximately 35-40 C/W, junction rise above ambient stays well under 2 C in typical HMI designs. For sealed enclosures, however, verify with derating curves because the BGA attach-only path limits heat flow to the PCB stack-up.
Do not omit the on-board decoupling. Place a 100 nF X7R plus 4.7 uF bulk capacitor within 2 mm of each VDD pin pair and tie all VDDCORE pins through a common ferrite bead to VDDIO. Failure to do so can cause sporadic reset events under USB enumeration stress because the 1.2 V core regulator is sensitive to high-frequency load transients.
Compliance Information
RoHS and REACH compliance per Microchip SAM4S family product page. Not AEC-Q100 qualified. AEC-Q100 variants are typically sold under distinct MPNs in the SAM automotive grade. Lead-free reflow JEDEC J-STD-020 compliant.
