ATSAM4S4CA-CU - 120MHz Cortex-M4 MCU 256KB Flash | Microchip
MPN: ATSAM4S4CA-CU ✓ Hoạt độngATSAM4S4CA-CU Tóm tắt
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the lowest tier of the embedded processing hierarchy (MCU -> embedded processor -> system-on-chip). The SAM4S family sits within the Microchip (formerly Atmel) SMART ARM-based MCU portfolio and belongs to the broader class of 32-bit RISC flash microcontrollers used in embedded control systems. The ATSAM4S4CA-CU is one of the smaller Flash/RAM members of the family, positioned for cost-sensitive industrial designs that still need the full SAM4S peripheral set.
Key differentiating features include the Cortex-M4 core with DSP instructions and a single-precision hardware FPU for math-intensive control loops, a full-speed USB Device port with embedded transceiver, an external bus interface supporting SRAM, PSRAM, NOR Flash, NAND Flash, and LCD modules, and native support for Microchip QTouch capacitive touch technology for buttons, sliders, and wheels. The SAM4S peripheral set also includes multiple USART/SPI/TWI (I2C) interfaces, PWM timers, a 12-bit ADC, and a parallel capture mode for data acquisition.
The SAM4S architecture implements up to 2048 KB of Flash with optional dual-bank implementation across the family, up to 160 KB of SRAM on larger variants, and Microchip-documented pin-to-pin compatibility with SAM7S, SAM3N, SAM4N and SAM3S devices. The 120 MHz core with FPU achieves roughly 1.25 DMIPS/MHz class performance for deterministic real-time control, and the on-chip cache above 128 KB Flash variants accelerates execution from Flash.
Typical applications include industrial automation controllers, consumer and industrial touch interfaces, motor control, USB-connected instruments, and embedded systems requiring external memory or LCD expansion via the EBI. The 100-ball TFBGA keeps the board footprint small while exposing the full EBI and peripheral count of the device.
Design consideration: the ATSAM4S4CA-CU is supplied in tray packaging for industrial-grade operation, and the TFBGA ball footprint requires careful PCB land-pattern design and X-ray-capable inspection. Designers migrating from SAM7S, SAM3N, SAM3S, or SAM4N devices benefit from documented pin-to-pin compatibility within the Microchip portfolio.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with all pricing referenced as of 2026-10-07.
Bộ thay thế dễ dàng lắp đặt cho ATSAM4S4CA-CU — 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 ATSAM4S4CA-CU (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, RoHS Status, SRAM, Core Size.
ATSAM4S4CA-CFU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4SD32CA-CU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S2CA-CU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAM3S4CA-CU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S4CB-CU
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATSAM3U4EA-CU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S4CA-CU Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M4 with FPU and DSP instructions |
| Tần số xung maksimum | 120 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Supply Voltage (VDDIO/VDDANA) | 1.2 V core / 3.3 V I/O (per datasheet) |
| Hộp | 100-ball TFBGA (9x9 mm) |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| USB Interface | USB 2.0 Full-Speed Device with embedded transceiver |
| External Bus Interface (EBI) | Supports SRAM, PSRAM, NOR Flash, NAND Flash, LCD modules |
| Touch Library Support | Microchip QTouch capacitive touch (buttons, sliders, wheels) |
| ADC | 12-bit successive approximation |
| Communication Peripherals | USART, SPI, TWI (I2C), HS USB |
| Timers/PWM | 16-bit and 32-bit timers with PWM channels |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020, reflow up to 260 C) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes (Green / Pb-free) |
| Product Family Pin Compatibility | Pin-to-pin compatible with SAM7S, SAM3N, SAM3S, SAM4N devices |
Cấu hình chân ATSAM4S4CA-CU
| Chân A1 | VDDIO — I/O supply (3.3 V) |
| Chân A2 | PA0 — GPIO / peripheral function |
| Chân A3 | PA1 — GPIO / peripheral function |
| Chân A4 | PA2 — GPIO / peripheral function |
| Chân A5 | PA3 — GPIO / peripheral function |
| Chân A6 | VDDIO — I/O supply (3.3 V) |
| Chân A7 | VSS — Ground |
| Chân A8 | PA4 — GPIO / peripheral function |
| Chân A9 | PA5 — GPIO / peripheral function |
| Chân A10 | PA6 — GPIO / peripheral function |
| Chân B1 | VDDOUT — Voltage regulator output (1.2 V core) |
| Chân B2 | PA7 — GPIO / peripheral function |
| Chân B3 | PA8 — GPIO / peripheral function |
| Chân B4 | PA9 — GPIO / peripheral function |
| Chân B5 | PA10 — GPIO / peripheral function |
| Chân B6 | PA11 — GPIO / peripheral function |
| Chân B7 | PA12 — GPIO / peripheral function |
| Chân B8 | PA13 — GPIO / peripheral function |
| Chân B9 | PA14 — GPIO / peripheral function |
| Chân B10 | VSS — Ground |
| Chân C1 | VDDIN — Voltage regulator input |
| Chân C2 | PA15 — GPIO / peripheral function |
| Chân C3 | PA16 — GPIO / peripheral function |
| Chân C4 | PA17 — GPIO / peripheral function |
| Chân C5 | PA18 — GPIO / peripheral function |
| Chân C6 | PA19 — GPIO / peripheral function |
| Chân C7 | PA20 — GPIO / peripheral function |
| Chân C8 | PA21 — GPIO / peripheral function |
| Chân C9 | PA22 — GPIO / peripheral function |
| Chân C10 | PA23 — GPIO / peripheral function |
| Chân D1 | PB0 — GPIO / peripheral function |
| Chân D2 | PB1 — GPIO / peripheral function |
| Chân D3 | PB2 — GPIO / peripheral function |
| Chân D4 | PB3 — GPIO / peripheral function |
| Chân D5 | PB4 — GPIO / peripheral function |
| Chân D6 | PB5 — GPIO / peripheral function |
| Chân D7 | PB6 — GPIO / peripheral function |
| Chân D8 | PB7 — GPIO / peripheral function |
| Chân D9 | PB8 — GPIO / peripheral function |
| Chân D10 | PB9 — GPIO / peripheral function |
| Chân E1 | PB10 — GPIO / peripheral function |
| Chân E2 | PB11 — GPIO / peripheral function |
| Chân E3 | PB12 — GPIO / peripheral function |
| Chân E4 | PB13 — GPIO / peripheral function |
| Chân E5 | PB14 — GPIO / peripheral function |
| Chân E6 | PB15 — GPIO / peripheral function |
| Chân E7 | PB16 — GPIO / peripheral function |
| Chân E8 | PB17 — GPIO / peripheral function |
| Chân E9 | PB18 — GPIO / peripheral function |
| Chân E10 | PB19 — GPIO / peripheral function |
| Chân F1 | PC0 — GPIO / peripheral function |
| Chân F2 | PC1 — GPIO / peripheral function |
| Chân F3 | PC2 — GPIO / peripheral function |
| Chân F4 | PC3 — GPIO / peripheral function |
| Chân F5 | PC4 — GPIO / peripheral function |
| Chân F6 | PC5 — GPIO / peripheral function |
| Chân F7 | PC6 — GPIO / peripheral function |
| Chân F8 | PC7 — GPIO / peripheral function |
| Chân F9 | PC8 — GPIO / peripheral function |
| Chân F10 | PC9 — GPIO / peripheral function |
| Chân G1 | PC10 — GPIO / peripheral function |
| Chân G2 | PC11 — GPIO / peripheral function |
| Chân G3 | PC12 — GPIO / peripheral function |
| Chân G4 | PC13 — GPIO / peripheral function |
| Chân G5 | PC14 — GPIO / peripheral function |
| Chân G6 | PC15 — GPIO / peripheral function |
| Chân G7 | PC16 — GPIO / peripheral function |
| Chân G8 | PC17 — GPIO / peripheral function |
| Chân G9 | PC18 — GPIO / peripheral function |
| Chân G10 | PC19 — GPIO / peripheral function |
| Chân H1 | PD0 — GPIO / peripheral function |
| Chân H2 | PD1 — GPIO / peripheral function |
| Chân H3 | PD2 — GPIO / peripheral function |
| Chân H4 | PD3 — GPIO / peripheral function |
| Chân H5 | PD4 — GPIO / peripheral function |
| Chân H6 | PD5 — GPIO / peripheral function |
| Chân H7 | PD6 — GPIO / peripheral function |
| Chân H8 | PD7 — GPIO / peripheral function |
| Chân H9 | PD8 — GPIO / peripheral function |
| Chân H10 | PD9 — GPIO / peripheral function |
| Chân J1 | VDDIO — I/O supply (3.3 V) |
| Chân J2 | NRST — Reset input (active low) |
| Chân J3 | JTMS/SWDIO — JTAG / Serial Wire Debug I/O |
| Chân J4 | JTCK/SWCLK — JTAG / Serial Wire Debug clock |
| Chân J5 | JTDO — JTAG data out |
| Chân J6 | JTDI — JTAG data in |
| Chân J7 | VDDCORE — Core supply (1.2 V) |
| Chân J8 | VSS — Ground |
| Chân J9 | XIN — Crystal oscillator input |
| Chân J10 | XOUT — Crystal oscillator output |
Ứng dụng tiêu biểu
ATSAM4S4CA-CU phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, USB-Connected Instruments, Capacitive Touch HMIs, Motor Control and BLDC Drives, Display and LCD Expansion Modules, IoT Edge Sensor Nodes.
Industrial Automation Controllers
The ATSAM4S4CA-CU fits industrial PLC and remote I/O modules because its 120 MHz Cortex-M4 core with hardware FPU runs PID control loops and signal-processing filters with deterministic latency, while the 256 KB Flash holds a real-time OS plus application logic. The EBI lets the design add external SRAM or NOR Flash for data logging, and the 100-ball TFBGA keeps the controller compact inside DIN-rail enclosures. Industrial temperature grade (-40 C to +85 C) and QTouch support allow the same board to drive both logic and capacitive key interfaces without a separate touch controller.
Được đề xuất
USB-Connected Instruments
The integrated USB 2.0 Full-Speed Device port with embedded transceiver makes the ATSAM4S4CA-CU well-suited to lab instruments, data-acquisition front-ends, and service tools that present a CDC/HID/MSC interface to a host PC. With the Cortex-M4 FPU, the MCU can run DSP filters on incoming ADC samples before sending them over USB, and the 64 KB SRAM buffers packet bursts without dropping samples. Designers moving from the SAM3S series benefit from the documented SAM4S peripheral compatibility while keeping the same TFBGA-100 footprint and toolchain.
Được đề xuất
Capacitive Touch HMIs
Native support for Microchip's QTouch library turns the ATSAM4S4CA-CU into a single-chip HMI controller for buttons, sliders, and wheels on appliances, machine tools, and consumer white goods. The Cortex-M4 runs the touch acquisition and debouncing in the background while the FPU handles any companion math, and the 256 KB Flash comfortably stores QTouch parameters plus the application stack. The 100-ball TFBGA footprint keeps the touch-sensor board outline small enough for bezels around displays, and the industrial temperature rating supports outdoor or factory-floor enclosures.
Được đề xuất
Motor Control and BLDC Drives
Small BLDC and stepper drives benefit from the ATSAM4S4CA-CU's combination of a Cortex-M4 with single-precision FPU, PWM timers, and a 12-bit ADC. The FPU accelerates Park/Clarke transforms and PI loop math at the 120 MHz clock, while the 16-bit timers generate the center-aligned PWM channels that drive the gate drivers. With 256 KB Flash the design can host field-oriented control firmware plus a small RTOS, and the EBI allows adding an external LCD for local status display without a second controller.
Được đề xuất
Display and LCD Expansion Modules
The on-chip External Bus Interface (EBI) supports parallel LCD modules as well as SRAM, PSRAM, NOR, and NAND Flash, so the ATSAM4S4CA-CU can drive a small TFT or character LCD directly from the same data bus. 64 KB of SRAM is enough for a framebuffer on compact displays, and 256 KB Flash fits the display driver stack plus UI logic. The industrial temperature grade and TFBGA-100 footprint suit integration into HMI panels, vending machines, and instrumentation front panels where the display module sits next to the controller.
Được đề xuất
IoT Edge Sensor Nodes
The ATSAM4S4CA-CU is a good fit for wired IoT edge nodes that read sensors and forward data over USB, UART, or SPI. Its 12-bit ADC handles analog sensor inputs directly, and the FPU runs local filtering or FFT pre-processing before transmission. The 100-ball TFBGA package keeps the node compact, and the SAM4S family's documented pin-to-pin compatibility with SAM3S/SAM4N gives the firmware team a clear migration path to lower-cost or higher-memory siblings when the design is ready for production scaling.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAM4S4CA-CU — 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 | ATSAM4S4CA-CFU | ATSAM4SD32CA-CU | ATSAM4S2CA-CU | ATSAM3S4CA-CU | ATSAM4S4CB-CU | ATSAM3U4EA-CU |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-ball TFBGA (9x9 mm) | 100-ball TFBGA (9x9 mm) | 100-ball TFBGA (9x9 mm) | 100-ball TFBGA (9x9 mm) | 100-ball TFBGA (9x9 mm) | 100-ball TFBGA (9x9 mm) | 100-ball TFBGA (9x9 mm) |
| Core Architecture | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M3 (no FPU) | ARM Cortex-M4 with FPU | ARM Cortex-M3 (no FPU) |
| Maximum Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 96 MHz |
| Flash Memory | 256 KB | 256 KB | 1 MB | 128 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 160 KB | 32 KB | 48 KB | 64 KB | 52 KB |
| USB Interface | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 High-Speed Device |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| RoHS Compliance | Yes (Green, Pb-free) | Yes (Green, Pb-free) | Yes (Green, Pb-free) | Yes (Green, Pb-free) | Yes (Green, Pb-free) | Yes (Green, Pb-free) | Yes (Green, Pb-free) |
Bảo phân biệt quan trọng
- Drop-in upgrade path to 1 MB Flash in the same TFBGA-100 footprint (vsATSAM4SD32CA-CU)
- FPU and DSP extensions at the same density and price tier (vsATSAM3S4CA-CU)
- Same-family HS-USB migration option in the same TFBGA-100 package (vsATSAM3U4EA-CU)
Ghi chú thiết kế
Estimated: The ATSAM4S4CA-CU ships in a 100-ball TFBGA (9x9 mm) and requires a controlled-impedance, BGA-specific PCB land pattern. Use NSMD (non-solder-mask-defined) pads with a 0.4 mm pitch and follow Microchip's BGA layout application note for via-in-pad or dog-bone fanout. Plan for X-ray inspection at production because the BGA joints are hidden under the package, and use a reflow profile that respects the JEDEC J-STD-020 MSL-3 floor life (168 hours at <= 30 C / 60% RH) before reflow to avoid popcorn cracking.
Estimated: The ATSAM4S4CA-CU integrates a 1.2 V core regulator that draws from VDDIN; place a 4.7 uF X7R bypass on VDDIN, a 1 uF X7R on VDDCORE, and a 100 nF X7R per VDDIO pin. With the core running at 120 MHz and all peripherals enabled, total VDDIO current typically peaks around 80-100 mA; providing a 3.3 V LDO rated for at least 200 mA leaves margin for USB enumeration spikes and inrush during Flash programming. Decouple VSS with a solid ground plane stitched directly under the BGA.
Do not skip the bulk capacitor on VDDCORE - the internal regulator's load step when the CPU wakes from sleep can cause a brown-out reset on under-decoupled boards. Also ensure NRST has a 10 kohm pull-up and a 100 nF cap to ground for clean reset behaviour, and use SWD (SWDIO/SWCLK) instead of JTAG whenever possible to free up the JTMS/JTCK balls for GPIO. Pin-to-pin migration between SAM7S, SAM3N, SAM3S, SAM4N and SAM4S is documented by Microchip but always re-check errata for the exact revision.
Keep the XIN/XOUT crystal traces short and symmetric, place the load capacitors within 2 mm of the oscillator balls, and guard the crystal region with a ground ring to minimise crosstalk. For the USB DP/DM pins, route a 90 ohm differential pair with length matching within 150 mil and add the 15 kohm pull-down resistors on DP and DM only when the device is configured as USB Device. Failing to add the common-mode choke can lead to radiated emissions failures on USB-IF compliance tests.
Thông tin tuân thủ
Marked Green / Pb-free by Microchip per DigiKey and Mouser product listings. MSL-3 (JEDEC J-STD-020). Not AEC-Q100 qualified - the part is targeted at industrial applications, not automotive.
