Описание
The SAM3S4B is a member of the Microchip SMART 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 256KB of flash memory and 48KB 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, three 16-bit timers, RTC, 10-ch 12-bit ADC, 2-ch 12-bit DAC, and an analog comparator. The QTouch library offers an easy way to implement buttons, wheels, and sliders. 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 and is pin-to-pin compatible with the SAM3N4B and SAM7S64.
- 1.62V to 3.6V supply
- Cortex-M3 rev 2.0 processor running at up to 64MHz
- Memory protection unit (MPU)
- Optional dual-bank Flash
- Native 4-layer AHB bus matrix, 21 DMA channels
- Embedded regulator, power-on reset, brown-out detection and multiple clock sources, including 32kHz oscillator and factory-trimmed RC
- High-speed peripherals, including USB2.0 FS device, HS SD/SDIO/MMC, USART, SPI
- Up to 16-channel 12-bit 1Msps ADC with PGA stage and differential inputs, 2-channel 12-bit 1Msps DAC, analog comparator
- Powerful and flexible 16-bit timers with quadrature decoder and gray counter. Powerful PWM unit, calendar RTC, watchdog timer
- Power consumption 2.3mW@1MHz, 1.3mW@500kHz, backup mode down to 1.8µA
- ECC on flash, independent watchdog, dual-bank flash, clock failure detection. On-the-fly external memory scrambling.
- 8-bit parallel data capture on PIO controller
- Up to 79 I/O lines with integrated serial resistors(on-die termination)
- 48-, 64- and 100-pin packages
