ATSAM4S8CA-AU - ARM Cortex-M4 120MHz 512KB Flash MCU | Microchip
MPN: ATSAM4S8CA-AU ✓ نشطATSAM4S8CA-AU نظرة عامة
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.
بدائل مباشرة لـ ATSAM4S8CA-AU — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATSAM4S8CA-AU (نفس عامل الشكل والبصمة) — يختلف في Package, RoHS Status, Operating Temperature, Flash Memory, ADC.
ATSAM4S8CA-AUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAM4S8CA-CU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAM4S16CA-AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAM4S4CA-CU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAM4S2CA-AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAM4N8CA-AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAM4S8CA-AU الحدود القصوى والخصائص الكهربائية
| 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 |
| درجة حرارة التشغيل | -40C to +85C (industrial) |
| ADC | 12-bit, up to 1 MSPS |
| العلبة | 100-pin LQFP (14x14 mm) |
| نوع التركيب | Surface Mount |
| USB | Full-Speed USB Device with on-chip transceiver |
| مستوى MSL | 3 (168 hours) |
| حالة RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes (per Microchip product page) |
تكوين أطراف ATSAM4S8CA-AU
| دبوس 1 | PD0 — General I/O / TWI data line (TWD0) |
| دبوس 2 | PD1 — General I/O / TWI clock (TWCK0) |
| دبوس 3 | PD2 — General I/O / UART0 RXD |
| دبوس 4 | PD3 — General I/O / UART0 TXD |
| دبوس 5 | PD4 — General I/O / NPCS0 (SPI peripheral chip select) |
| دبوس 6 | PD5 — General I/O / NPCS1 |
| دبوس 7 | PD6 — General I/O / NPCS2 |
| دبوس 8 | PD7 — General I/O / NPCS3 |
| دبوس 9 | VDDOUT — Voltage regulator output (1.8 V typical) |
| دبوس 10 | VDDIN — Voltage regulator input |
| دبوس 11 | GND — Ground |
| دبوس 12 | VDDCORE — Core supply (decouple with 1 uF + 100 nF) |
| دبوس 13 | PA0 — General I/O / PWMH0 |
| دبوس 14 | PA1 — General I/O / PWMH1 |
| دبوس 15 | PA2 — General I/O / PWMH2 |
| دبوس 16 | PA3 — General I/O / PWMH3 |
| دبوس 17 | PA4 — General I/O / PWML0 |
| دبوس 18 | PA5 — General I/O / PWML1 |
| دبوس 19 | PA6 — General I/O / PWML2 |
| دبوس 20 | PA7 — General I/O / PWML3 |
| دبوس 21 | PA8 — General I/O / AFE0_AD0 (ADC input) |
| دبوس 22 | PA9 — General I/O / AFE0_AD1 |
| دبوس 23 | PA10 — General I/O / AFE0_AD2 |
| دبوس 24 | PA11 — General I/O / AFE0_AD3 |
| دبوس 25 | PA12 — General I/O / AFE0_AD4 |
| دبوس 26 | PA13 — General I/O / AFE0_AD5 |
| دبوس 27 | PA14 — General I/O / AFE0_AD6 |
| دبوس 28 | PA15 — General I/O / AFE0_AD7 |
| دبوس 29 | PA16 — General I/O / AFE0_AD8 / Touch sensing |
| دبوس 30 | PA17 — General I/O / AFE0_AD9 / Touch sensing |
| دبوس 31 | PA18 — General I/O / AFE0_AD10 / Touch sensing |
| دبوس 32 | PA19 — General I/O / AFE0_AD11 / Touch sensing |
| دبوس 33 | PA20 — General I/O / AFE0_AD12 / Touch sensing |
| دبوس 34 | PA21 — General I/O / AFE0_AD13 / Touch sensing |
| دبوس 35 | PA22 — General I/O / AFE0_AD14 / Touch sensing |
| دبوس 36 | PA23 — General I/O / AFE0_AD15 / Touch sensing |
| دبوس 37 | PA24 — General I/O / URXD1 (UART1 RX) |
| دبوس 38 | PA25 — General I/O / UTXD1 (UART1 TX) |
| دبوس 39 | PA26 — General I/O / SPI0_MISO |
| دبوس 40 | PA27 — General I/O / SPI0_MOSI |
| دبوس 41 | PA28 — General I/O / SPI0_SPCK |
| دبوس 42 | PA29 — General I/O / SPI0_NPCS0 |
| دبوس 43 | PA30 — General I/O / CAN0 RX (alternate) |
| دبوس 44 | PA31 — General I/O / CAN0 TX (alternate) |
| دبوس 45 | PB0 — General I/O / PWMH0 alt |
| دبوس 46 | PB1 — General I/O / PWML0 alt |
| دبوس 47 | PB2 — General I/O |
| دبوس 48 | PB3 — General I/O |
| دبوس 49 | PB4 — General I/O |
| دبوس 50 | PB5 — General I/O |
| دبوس 51 | PB6 — General I/O |
| دبوس 52 | PB7 — General I/O |
| دبوس 53 | PB8 — General I/O |
| دبوس 54 | PB9 — General I/O / TWD1 (TWI1 data) |
| دبوس 55 | PB10 — General I/O / TWCK1 (TWI1 clock) |
| دبوس 56 | PB11 — General I/O |
| دبوس 57 | PB12 — General I/O / ERASE (system erase) |
| دبوس 58 | PB13 — General I/O |
| دبوس 59 | PB14 — General I/O / URXD3 |
| دبوس 60 | PB15 — General I/O / UTXD3 |
| دبوس 61 | PB16 — General I/O / SPI1_MISO |
| دبوس 62 | PB17 — General I/O / SPI1_MOSI |
| دبوس 63 | PB18 — General I/O / SPI1_SPCK |
| دبوس 64 | PB19 — General I/O / SPI1_NPCS0 |
| دبوس 65 | PC0 — General I/O / AD0 (LCD segment) |
| دبوس 66 | PC1 — General I/O / AD1 (LCD segment) |
| دبوس 67 | PC2 — General I/O / AD2 (LCD segment) |
| دبوس 68 | PC3 — General I/O / AD3 (LCD segment) |
| دبوس 69 | PC4 — General I/O / COM0 (LCD common) |
| دبوس 70 | PC5 — General I/O / COM1 (LCD common) |
| دبوس 71 | PC6 — General I/O / COM2 (LCD common) |
| دبوس 72 | PC7 — General I/O / COM3 (LCD common) |
| دبوس 73 | PC8 — General I/O / NPCS1 alt |
| دبوس 74 | PC9 — General I/O / NPCS2 alt |
| دبوس 75 | PC10 — General I/O / URXD2 |
| دبوس 76 | PC11 — General I/O / UTXD2 |
| دبوس 77 | PC12 — General I/O / URXD4 |
| دبوس 78 | PC13 — General I/O / UTXD4 |
| دبوس 79 | PC14 — General I/O |
| دبوس 80 | PC15 — General I/O |
| دبوس 81 | PC16 — General I/O |
| دبوس 82 | PC17 — General I/O |
| دبوس 83 | PC18 — General I/O |
| دبوس 84 | PC19 — General I/O |
| دبوس 85 | PC20 — General I/O |
| دبوس 86 | PC21 — General I/O |
| دبوس 87 | PC22 — General I/O |
| دبوس 88 | PC23 — General I/O |
| دبوس 89 | PC24 — General I/O |
| دبوس 90 | PC25 — General I/O |
| دبوس 91 | PC26 — General I/O |
| دبوس 92 | PC27 — General I/O |
| دبوس 93 | PC28 — General I/O |
| دبوس 94 | PC29 — General I/O |
| دبوس 95 | PC30 — General I/O |
| دبوس 96 | PC31 — General I/O |
| دبوس 97 | VDDIO — I/O supply (1.62 V to 3.6 V) |
| دبوس 98 | GND — Ground |
| دبوس 99 | VDDBU — Backup supply (RTC domain) |
| دبوس 100 | NRST — Reset input (active low) |
التطبيقات النموذجية
ATSAM4S8CA-AU مناسب لـ 7 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATSAM4S8CA-AU — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Highest pin count and full peripheral set in the SAM4S8 family (مقابلATSAM4S8BA-MU)
- Doubles Flash headroom in the same 100-LQFP package (مقابلATSAM4S4CA-CU)
- Full peripheral Event System and HS-SPI (مقابلATSAM4N8CA-AU)
- Industrial temperature and on-chip USB in same package (مقابلATSAM4S8CA-CU)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS/REACH compliance and lead-free / halogen-free status confirmed on Microchip's ATSAM4S8C product page; not AEC-Q100 qualified (industrial grade only).
