Описание
The Microchip | SMART SAM4E series of Flash microcontrollers is based on thehigh-performance 32-bit ARM Cortex -M4 RISC processor and includes afloating point unit (FPU). It operates at a maximum speed of 120 MHz andfeatures up to 1024 Kbytes of Flash, 2 Kbytes of cache memory and up to128 Kbytes of SRAM.The SAM4E offers a rich set of advanced connectivity peripherals including10/100 Mbps Ethernet MAC supporting IEEE 1588 and dual CAN. With a singleprecisionFPU, advanced analog features, as well as a full set of timing andcontrol functions, the SAM4E is the ideal solution for industrial automation, homeand building control, machine-to-machine communications, automotiveaftermarket and energy management applications.The peripheral set includes a full-speed USB device port with embeddedtransceiver, a 10/100 Mbps Ethernet MAC supporting IEEE 1588, a high-speedMCI for SDIO/SD/MMC, an external bus interface featuring a static memorycontroller providing connection to SRAM, PSRAM, NOR Flash, LCD Module andNAND Flash, a parallel I/O capture mode for camera interface, hardwareacceleration for AES256, 2 USARTs, 2 UARTs, 2 TWIs, 3 SPIs, as well as a 4-channel PWM, 3 three-channel general-purpose 32-bit timers (with stepper motorand quadrature decoder logic support), a low-power RTC, a low-power RTT, 256-bit General Purpose Backup Registers, 2 Analog Front End interfaces (16-bitADC, DAC, MUX and PGA), one 12-bit DAC (2-channel) and an analogcomparator.The SAM4E devices have three software-selectable low-power modes: Sleep,Wait and Backup. In Sleep mode, the processor is stopped while all otherfunctions can be kept running. In Wait mode, all clocks and functions are stoppedbut some peripherals can be configured to wake up the system based onpredefined conditions.The Real-time Event Managment allows peripherals to receive, react to and sendevents in Active and Sleep modes without processor intervention.
- Core
- ARM Cortex-M4 with 2 Kbytes Cache running at up to 120 MHz(1)
- Memory Protection Unit (MPU)
- DSP Instruction
- Floating Point Unit (FPU)
- Thumb®-2 Instruction Set
- Memories
- Up to 1024 Kbytes Embedded Flash
- 128 Kbytes Embedded SRAM
- 16 Kbytes ROM with Embedded Boot Loader Routines (UART) and IAP Routines ?
- Static Memory Controller (SMC): SRAM, NOR, NAND Support
- NAND Flash Controller
- System
- Embedded Voltage Regulator for Single Supply Operation
- Power-on-Reset (POR), Brown-out Detector (BOD) and Dual Watchdog for Safe Operation
- Quartz or Ceramic Resonator Oscillators: 3 to 20 MHz Main Power with Failure Detection and Optional Lowpower 32.768 kHz for RTC or Device Clock
- RTC with Gregorian and Persian Calendar Mode, Waveform Generation in Backup mode
- RTC counter calibration circuitry compensates for 32.768 kHz crystal frequency inaccuracy
- High Precision 4/8/12 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
- One PLL up to 240 MHz for Device Clock and for USB ?
- Temperature Sensor ?
- Low-power tamper detection on two inputs, anti-tampering by immediate clear of general-purpose backup registers (GPBR)
- Up to 2 Peripheral DMA Controllers (PDC) with up to 33 Channels ?
- One 4-channel DMA Controller
- Low-power Modes
- Sleep, Wait and Backup modes, down to 0.9 µA in Backup mode with RTC, RTT, and GPBR
- Peripherals
- Two USARTs with USART1 (ISO7816, IrDA®, RS-485, SPI, Manchester and Modem Modes)
- USB 2.0 Device: Full Speed (12 Mbits), 2668 byte FIFO, up to 8 Endpoints. On-chip Transceiver
- Two 2-wire UARTs
- Two 2-wire Interfaces (TWI)
- High-speed Multimedia Card Interface (SDIO/SD Card/MMC)
- One Master/Slave Serial Peripheral Interface (SPI) with Chip Select Signals
- Three 3-channel 32-bit Timer/Counter blocks with Capture, Waveform, Compare and PWM Mode. Quadrature Decoder Logic and 2-bit Gray Up/Down Counter for Stepper Motor
- 32-bit low-power Real-time Timer (RTT) and low-power Real-time Clock (RTC) with calendar and alarm features
- 256-bit General Purpose Backup Registers (GPBR)
- One Ethernet MAC (GMAC) 10/100 Mbps in MII mode only with dedicated DMA and Support for IEEE1588, Wake-on-LAN
- Two CAN Controllers with eight Mailboxes
- 4-channel 16-bit PWM with Complementary Output, Fault Input, 12-bit Dead Time Generator Counter for Motor Control
- Real-time Event Management
