Status: Not Recommended for new designs
The SAM3S8B is a member of the Microchip's SAM3S series microcontrollers based on the high-performance 32-bit ARM® Cortex®-M3 RISC processor. It operates at a maximum speed of 64MHz and features 512KB of flash memory and 64KB of SRAM.
The extensive peripheral set includes a Full Speed USB device port with embedded transceiver, a high-speed multimedia card interface for SDIO/SD/MMC, two USARTs, two UARTs, two TWIs (I2C), three SPIs, I2S, PWM timer, six 16-bit timers, RTC, 11-ch 12-bit ADC, 2-ch 12-bit DAC, and an analog comparator.
The Microchip QTouch Library offers an easy way to implement buttons, sliders, and wheels. The parallel data capture mode on the PIOs collects data from external devices not compliant with standard memory read protocols, such as low-cost image sensors. DMA transfers the data to memory, offloading the CPU.
The device operates from 1.62V to 3.6V and is available in 64-pin QFP and QFN packages.
ARM® Cortex®-M3 revision 2.0 running at up to 64 MHz
Memory Protection Unit (MPU)
DSP Instructions, Thumb®-2 instruction set
512 Kbytes Single Plane embedded Flash, 128-bit wide access, memory accelerator
64 Kbytes embedded SRAM
16 Kbytes ROM with embedded bootloader routines (UART, USB) and IAP routines
Embedded voltage regulator for single-supply operation
Power-on-Reset (POR), Brown-out Detector (BOD) and Watchdog for safe operation
Quartz or ceramic resonator oscillators: 0.6 to 30MHz main power with Failure Detection and low power 32.768 kHz for RTC or device clock
High precision 8/12 MHz factory trimmed internal RC oscillator with 4 MHz default frequency for device startup. In-application trimming access for frequency adjustment
Slow clock internal RC oscillator as permanent low-power mode device clock
Two PLLs up to 130 MHz for device clock and for USB
Up to 22 peripheral DMA (PDC) channels
Low Power Modes
Sleep and Backup modes, down to < 2 μA in Backup mode
Ultra low power RTC
64-lead LQFP, 10 x 10 mm, pitch 0.5 mm
64-lead QFN, 9 x 9 mm, pitch 0.5 mm
Temperature operating range
USB 2.0 Device and Embedded Host: 12 Mbps, up to 8 bidirectional Endpoints and Multi-packet Ping-pong Mode. On-Chip Transceiver
USB 2.0 Device: 12 Mbps, 2668 byte FIFO, up to 8 bidirectional Endpoints. On-Chip Transceiver
2 USARTs with ISO7816, IrDA®, RS-485, SPI, Manchester and Modem Mode
Two 2-wire UARTs
2 Two Wire Interface (I2C compatible), 1 SPI, 1 Serial Synchronous Controller (I2S), 1 High Speed Multimedia Card Interface (SDIO/SD Card/MMC)
two 3-channel 16-bit Timer Counters with capture, waveform, compare and PWM mode. Quadrature Decoder Logic and 2-bit Gray Up/Down Counter for Stepper Motor
4-channel 16-bit PWM with Complementary Output, Fault Input, 12-bit Dead Time Generator Counter for Motor Control
32-bit Real-time Timer and RTC with calendar and alarm features
32-bit Cyclic Redundancy Check Calculation Unit (CRCCU)
47 I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and on-die Series Resistor Termination
Three 32-bit Parallel Input/Output Controllers, Peripheral DMA assisted Parallel Capture Mode
11-channel, 1Msps ADC with differential input mode and programmable gain stage
One 2-channel 12-bit 1Msps DAC
One Analog Comparator with flexible input selection, Selectable input hysteresis
Debugger Development Support
Serial Wire/JTAG Debug Port(SWJ-DP)
Debug access to all memories and registers in the system, including Cortex-M4 register bank when the core is running, halted, or held in reset.
Serial Wire Debug Port (SW-DP) and Serial Wire JTAG Debug Port (SWJ-DP) debug access.
Flash Patch and Breakpoint (FPB) unit for implementing breakpoints and code patches.
Data Watchpoint and Trace (DWT) unit for implementing watchpoints, data tracing, and system profiling.
Instrumentation Trace Macrocell (ITM) for support of printf style debugging.
IEEE1149.1 JTAG Boundary-scan on all digital pins.
Integrated Software Libraries and Tools
ASF-Atmel software Framework – SAM software development framework
Integrated in the Atmel Studio IDE with a graphical user interface or available as standalone for GCC, IAR compilers.
DMA support, Interrupt handlers Driver support
USB, TCP/IP, Wi-Fi and Bluetooth, Numerous USB classes, DHCP and Wi-Fi encryption Stacks
RTOS integration, FreeRTOS is a core component
Atmel-ICE is a powerful development tool for debugging and programming ARM® Cortex®-M based SAM and AVR microcontrollers with on-chip debug capability.
Power Debugger is a powerful development tool for debugging and programming AVR microcontrollers using UPDI, JTAG, PDI, debugWIRE, aWire, TPI or SPI target interfaces and ARM® Cortex®-M based SAM microcontrollers using JTAG or SWD target interfaces.
In addition the Power Debugger has two independent current sensing channels for measuring and optimizing the power consumption of...
SAM-ICE is a JTAG emulator designed for SAMA5, SAM3, SAM4, SAM7 and SAM9 ARM® core-based MCUs and MPUs, including Thumb mode. It supports download speeds up to 720K Bytes per second and maximum JTAG speeds up to 12 MHZ. It also supports Serial Wire Debug (SWD) and Serial Wire Viewer (SWV) from SAM-ICE hardware V6.
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