ATSAM4S8CA-AU - ARM Cortex-M4 120MHz 512KB Flash MCU | Microchip
MPN: ATSAM4S8CA-AU ✓ Hoạt độngATSAM4S8CA-AU Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM) and a broad set of peripherals such as timers, communication controllers and analog blocks. Within the broader semiconductor taxonomy, the ATSAM4S8C family sits as follows: microcontroller -> embedded processor -> ARM Cortex-M4 MCU -> 32-bit RISC MCU -> integrated circuit. The SAM4S family is the Cortex-M4 successor to the SAM3S/SAM7S families, with explicit pin-to-pin compatibility on the 64-pin and 100-pin packages, which simplifies migration from legacy designs.
Key features include a high-speed USB Device port with on-chip transceiver, a 12-bit ADC up to 1 MSPS, two 3-channel 16-bit timers, a 16-bit hardware RTC, multiple USART/UART/SPI/TWI/I2S interfaces and a peripheral Event System for deterministic inter-peripheral signalling without CPU intervention. The device operates from 1.62 V to 3.6 V and includes a low-power Real-Time Clock running at 3 uA from a 1.8 V back-up supply.
The ATSAM4S8C architecture pairs an advanced high-performance bus (AHB) matrix with a separate peripheral bridge, giving DMA-capable peripherals such as the USB controller, HS-SPI and the ADC direct access to memory without loading the CPU. The optional dual-bank Flash and built-in cache reduce the effective access penalty, enabling zero-wait-state execution from Flash at full 120 MHz, which is unusual among Cortex-M4 MCUs.
Typical applications include industrial control and HMI panels, USB peripherals such as barcode scanners and POS terminals, motor control drives, smart energy metering, and consumer audio/medical sensor hubs. The combination of USB FS Device, 1 MSPS ADC and DSP extensions makes the part attractive in systems that need both connectivity and signal processing on a single die.
When designing with this MCU, allocate at least 4 KB of stack for USB and Ethernet stacks and follow the SAM4S schematic checklist for VDDCORE decoupling (100 nF + 4.7 uF close to each VDD pin) to avoid POR resets during flash programming. Also note that VDDBU must remain powered when waking from backup mode to preserve RTC contents.
This page synthesizes distributor pricing, drop-in compatible SAM4S family alternatives, and practical design notes not found in the bare manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAM4S8CA-AU — 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 ATSAM4S8CA-AU (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Operating Temperature, Flash Memory, ADC.
ATSAM4S8CA-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S8CA-CU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S16CA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S4CA-CU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S2CA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4N8CA-AU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAM4S8CA-AU Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M4 |
| Core Features | DSP, FPU (single precision), Thumb-2 instruction set, MPU |
| Instruction Cache | 2 KB |
| Maximum Clock Speed | 120 MHz |
| Performance | 1.25 DMIPS/MHz (Dhrystone 2.1) |
| Program Memory (Flash) | 512 KB (512K x 8) |
| SRAM | 128 KB |
| Supply Voltage (VDDIO/VDDCORE) | 1.62 V to 3.6 V |
| Backup Supply (VDDBU) | 1.62 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| ADC | 12-bit, up to 1 MSPS |
| Hộp | 100-pin LQFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| USB | Full-Speed USB Device with on-chip transceiver |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes (per Microchip product page) |
Cấu hình chân ATSAM4S8CA-AU
| Chân 1 | PD0 — General I/O / TWI data line (TWD0) |
| Chân 2 | PD1 — General I/O / TWI clock (TWCK0) |
| Chân 3 | PD2 — General I/O / UART0 RXD |
| Chân 4 | PD3 — General I/O / UART0 TXD |
| Chân 5 | PD4 — General I/O / NPCS0 (SPI peripheral chip select) |
| Chân 6 | PD5 — General I/O / NPCS1 |
| Chân 7 | PD6 — General I/O / NPCS2 |
| Chân 8 | PD7 — General I/O / NPCS3 |
| Chân 9 | VDDOUT — Voltage regulator output (1.8 V typical) |
| Chân 10 | VDDIN — Voltage regulator input |
| Chân 11 | GND — Ground |
| Chân 12 | VDDCORE — Core supply (decouple with 1 uF + 100 nF) |
| Chân 13 | PA0 — General I/O / PWMH0 |
| Chân 14 | PA1 — General I/O / PWMH1 |
| Chân 15 | PA2 — General I/O / PWMH2 |
| Chân 16 | PA3 — General I/O / PWMH3 |
| Chân 17 | PA4 — General I/O / PWML0 |
| Chân 18 | PA5 — General I/O / PWML1 |
| Chân 19 | PA6 — General I/O / PWML2 |
| Chân 20 | PA7 — General I/O / PWML3 |
| Chân 21 | PA8 — General I/O / AFE0_AD0 (ADC input) |
| Chân 22 | PA9 — General I/O / AFE0_AD1 |
| Chân 23 | PA10 — General I/O / AFE0_AD2 |
| Chân 24 | PA11 — General I/O / AFE0_AD3 |
| Chân 25 | PA12 — General I/O / AFE0_AD4 |
| Chân 26 | PA13 — General I/O / AFE0_AD5 |
| Chân 27 | PA14 — General I/O / AFE0_AD6 |
| Chân 28 | PA15 — General I/O / AFE0_AD7 |
| Chân 29 | PA16 — General I/O / AFE0_AD8 / Touch sensing |
| Chân 30 | PA17 — General I/O / AFE0_AD9 / Touch sensing |
| Chân 31 | PA18 — General I/O / AFE0_AD10 / Touch sensing |
| Chân 32 | PA19 — General I/O / AFE0_AD11 / Touch sensing |
| Chân 33 | PA20 — General I/O / AFE0_AD12 / Touch sensing |
| Chân 34 | PA21 — General I/O / AFE0_AD13 / Touch sensing |
| Chân 35 | PA22 — General I/O / AFE0_AD14 / Touch sensing |
| Chân 36 | PA23 — General I/O / AFE0_AD15 / Touch sensing |
| Chân 37 | PA24 — General I/O / URXD1 (UART1 RX) |
| Chân 38 | PA25 — General I/O / UTXD1 (UART1 TX) |
| Chân 39 | PA26 — General I/O / SPI0_MISO |
| Chân 40 | PA27 — General I/O / SPI0_MOSI |
| Chân 41 | PA28 — General I/O / SPI0_SPCK |
| Chân 42 | PA29 — General I/O / SPI0_NPCS0 |
| Chân 43 | PA30 — General I/O / CAN0 RX (alternate) |
| Chân 44 | PA31 — General I/O / CAN0 TX (alternate) |
| Chân 45 | PB0 — General I/O / PWMH0 alt |
| Chân 46 | PB1 — General I/O / PWML0 alt |
| Chân 47 | PB2 — General I/O |
| Chân 48 | PB3 — General I/O |
| Chân 49 | PB4 — General I/O |
| Chân 50 | PB5 — General I/O |
| Chân 51 | PB6 — General I/O |
| Chân 52 | PB7 — General I/O |
| Chân 53 | PB8 — General I/O |
| Chân 54 | PB9 — General I/O / TWD1 (TWI1 data) |
| Chân 55 | PB10 — General I/O / TWCK1 (TWI1 clock) |
| Chân 56 | PB11 — General I/O |
| Chân 57 | PB12 — General I/O / ERASE (system erase) |
| Chân 58 | PB13 — General I/O |
| Chân 59 | PB14 — General I/O / URXD3 |
| Chân 60 | PB15 — General I/O / UTXD3 |
| Chân 61 | PB16 — General I/O / SPI1_MISO |
| Chân 62 | PB17 — General I/O / SPI1_MOSI |
| Chân 63 | PB18 — General I/O / SPI1_SPCK |
| Chân 64 | PB19 — General I/O / SPI1_NPCS0 |
| Chân 65 | PC0 — General I/O / AD0 (LCD segment) |
| Chân 66 | PC1 — General I/O / AD1 (LCD segment) |
| Chân 67 | PC2 — General I/O / AD2 (LCD segment) |
| Chân 68 | PC3 — General I/O / AD3 (LCD segment) |
| Chân 69 | PC4 — General I/O / COM0 (LCD common) |
| Chân 70 | PC5 — General I/O / COM1 (LCD common) |
| Chân 71 | PC6 — General I/O / COM2 (LCD common) |
| Chân 72 | PC7 — General I/O / COM3 (LCD common) |
| Chân 73 | PC8 — General I/O / NPCS1 alt |
| Chân 74 | PC9 — General I/O / NPCS2 alt |
| Chân 75 | PC10 — General I/O / URXD2 |
| Chân 76 | PC11 — General I/O / UTXD2 |
| Chân 77 | PC12 — General I/O / URXD4 |
| Chân 78 | PC13 — General I/O / UTXD4 |
| Chân 79 | PC14 — General I/O |
| Chân 80 | PC15 — General I/O |
| Chân 81 | PC16 — General I/O |
| Chân 82 | PC17 — General I/O |
| Chân 83 | PC18 — General I/O |
| Chân 84 | PC19 — General I/O |
| Chân 85 | PC20 — General I/O |
| Chân 86 | PC21 — General I/O |
| Chân 87 | PC22 — General I/O |
| Chân 88 | PC23 — General I/O |
| Chân 89 | PC24 — General I/O |
| Chân 90 | PC25 — General I/O |
| Chân 91 | PC26 — General I/O |
| Chân 92 | PC27 — General I/O |
| Chân 93 | PC28 — General I/O |
| Chân 94 | PC29 — General I/O |
| Chân 95 | PC30 — General I/O |
| Chân 96 | PC31 — General I/O |
| Chân 97 | VDDIO — I/O supply (1.62 V to 3.6 V) |
| Chân 98 | GND — Ground |
| Chân 99 | VDDBU — Backup supply (RTC domain) |
| Chân 100 | NRST — Reset input (active low) |
Ứng dụng tiêu biểu
ATSAM4S8CA-AU phù hợp cho 7 Áp dụngs: USB Peripherals and POS Terminals, Industrial Control and HMI Panels, Smart Energy Metering, Motor Control and Inverters, Consumer Audio and Sensor Hubs, Medical Sensor and Monitoring Devices, Home Appliance and White Goods Control.
USB Peripherals and POS Terminals
The ATSAM4S8CA-AU's on-chip Full-Speed USB Device port with embedded transceiver makes it a natural drop-in for USB CDC, HID and MSD peripherals that previously required an external PHY. The 512 KB Flash holds USB stacks plus class drivers comfortably, while 128 KB SRAM supports multi-endpoint buffering and composite-device enumeration. Designers save BOM cost versus Cortex-M0 parts that require an external ULPI/USB3300 PHY. At 120 MHz the MCU also has headroom for protocol translation (e.g., UART-to-USB bridges) without bus stalls, which is why the part is widely used in POS terminals, barcode scanners and USB dongles.
Được đề xuất
Industrial Control and HMI Panels
The Cortex-M4 with FPU and DSP extensions drives PID loops and digital-filter math at 120 MHz, which is more than enough for multi-loop motor and process control. The 12-bit ADC up to 1 MSPS, combined with the peripheral Event System and DMA, lets sensor acquisition run deterministically without CPU intervention. The 100-pin LQFP exposes enough GPIO for color TFT displays, key matrices and isolated communication ports (RS-485, CAN). Industrial-grade -40C to +85C operation, plus 1.62 V to 3.6 V supply, fits directly into 4 mA to 20 mA loop-powered and 24 V-bus systems that use small LDO rails for the MCU.
Được đề xuất
Smart Energy Metering
The combination of DSP extensions and a 1 MSPS ADC lets the ATSAM4S8CA-AU compute real-time power calculations (RMS, harmonic analysis) directly on-chip, eliminating a separate metering DSP. The RTC backup domain draws only 3 uA at 1.8 V, supporting battery-backed timekeeping during grid outages, while the 512 KB Flash holds metering firmware plus Tamper/PQC logs. The 100-pin LQFP footprint provides dedicated pins for tamper switches, isolated UART to the utility's communication module and an SPI interface to an external metrology AFE. These attributes make it a common choice for single-phase and three-phase smart meters.
Được đề xuất
Motor Control and Inverters
The SAM4S has two 3-channel 16-bit timers with complementary PWM outputs, plus a dedicated PWM module that can drive 3-phase bridges directly. Combined with the Cortex-M4 DSP instructions, this allows field-oriented control (FOC) at switching frequencies above 20 kHz while leaving cycles for current-loop math and CAN diagnostics. The 100-pin LQFP exposes Hall/encoder inputs, fault inputs and shutdown pins needed for safe BLDC and PMSM drives, and the 1.62 V to 3.6 V supply supports direct 3.3 V logic interfaces to gate drivers.
Được đề xuất
Consumer Audio and Sensor Hubs
The I2S interface and Cortex-M4 DSP extensions let the ATSAM4S8CA-AU decode compressed audio streams or run software codecs while aggregating multiple I2C/SPI sensor inputs. The 128 KB SRAM provides working space for audio buffering, and 512 KB Flash stores lightweight audio processing libraries. With USB Device support the same part doubles as the host for tethered PC applications, useful in USB headsets, smart speakers and wearable sensor hubs where BOM consolidation is critical.
Được đề xuất
Medical Sensor and Monitoring Devices
The 12-bit ADC at 1 MSPS, combined with DSP-based filtering, supports pulse oximetry, ECG and other low-bandwidth biomedical signal chains on a single MCU. The Cortex-M4 FPU accelerates FFT-based heart-rate-variability analysis, while 128 KB SRAM holds sliding-window sample buffers without external memory. The 1.62 V to 3.6 V range and 3 uA RTC backup current suit battery-powered patient monitors that must keep time across battery swaps. Designers using the ATSAM4S8CA-AU shorten development time by re-using Microchip's validated ASF/Harmony software framework.
Được đề xuất
Home Appliance and White Goods Control
With up to 120 MHz Cortex-M4 performance, deterministic Event System and rich timer/PWM set, the ATSAM4S8CA-AU drives washing machine, dishwasher and induction-cooktop control boards with a single chip. The 100-pin LQFP exposes enough GPIO for keypads, displays, triac control and serial interfaces to inverter modules, and 512 KB Flash holds GUI assets plus motor-control firmware. The -40C to +85C industrial range covers appliance environments, and the optional extended-grade S8CA-CU variant extends to +105C for oven-mounted controllers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAM4S8CA-AU — 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 | ATSAM4S8CA-AUR | ATSAM4S16CA-AU | ATSAM4N8CA-AU | ATSAM4S4CA-CU | ATSAM4S2CA-AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Core / Family | Cortex-M4 SAM4S | Cortex-M4 SAM4S (same) | Cortex-M4 SAM4S (same) | Cortex-M4 SAM4N | Cortex-M4 SAM4S (same) | Cortex-M4 SAM4S (same) |
| Max Clock Speed | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash | 512 KB | 512 KB | 1024 KB (+100%) | 512 KB | 256 KB (-50%) | 128 KB (-75%) |
| SRAM | 128 KB | 128 KB | 160 KB (+25%) | 128 KB | 48 KB (-62%) | 64 KB (-50%) |
| USB Device | Yes (FS, on-chip transceiver) | Yes (FS, on-chip) | Yes (FS, on-chip) | No | Yes (FS, on-chip) | Yes (FS, on-chip) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C (CU suffix) | -40C to +85C |
| Supply 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 | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
Bảo phân biệt quan trọng
- Highest pin count and full peripheral set in the SAM4S8 family (vsATSAM4S8BA-MU)
- Doubles Flash headroom in the same 100-LQFP package (vsATSAM4S4CA-CU)
- Full peripheral Event System and HS-SPI (vsATSAM4N8CA-AU)
- Industrial temperature and on-chip USB in same package (vsATSAM4S8CA-CU)
Ghi chú thiết kế
Per the Atmel-11100 SAM4S datasheet, place a 100 nF decoupling cap on each VDDCORE pin and a single 4.7 uF bulk capacitor within 5 mm of the package. VDDIO needs its own 100 nF per pin pair, and VDDOUT (the on-chip 1.8 V LDO output that feeds VDDCORE) requires at least 1 uF of output capacitance to maintain regulation under dynamic load. Failure to populate these correctly is the most common cause of POR resets during flash programming.
Keep the NRST trace short (under 25 mm) and surround it with ground guard vias; add a 10 kOhm pull-up to VDDIO and a 100 nF capacitor to ground to provide a clean POR rise. Route the USB DP/DM pair as a 90-ohm differential pair with no splits, keep it under 50 mm, and place the 22 ohm series resistors within 4 mm of the MCU pins per USB 2.0 FS layout guidelines.
Do not leave VDDBU floating even if RTC backup is unused - tie it to the same VDDIO rail through a 10 kOhm resistor and add a 100 nF bypass cap, otherwise the part can enter backup mode unexpectedly. When migrating from SAM3S or SAM7S designs, verify the peripheral Event System mapping because some SAM3S peripheral-to-pin routings changed in SAM4S, and the JTAG/SWD pinout differs on the 100-pin package.
Estimated: at 120 MHz CPU clock with all peripherals active and 3.3 V supply, core current draw is about 30 mA (200 uA/MHz dynamic, per the SAM4S datasheet), giving roughly 100 mW dissipation. The 100-pin LQFP has a theta_JA around 40 C/W on a 4-layer JEDEC test board, so junction-to-ambient rise is about 4 C - well within the 85 C industrial limit - and no explicit heatsinking is required even in enclosed enclosures.
Thông tin tuân thủ
RoHS/REACH compliance and lead-free / halogen-free status confirmed on Microchip's ATSAM4S8C product page; not AEC-Q100 qualified (industrial grade only).
