Описание
The Microchip SAM7X256 is a highly-integrated Flash microcontroller based on the 32-bit ARM RISC processor. It features 512/256/128 Kbytes of high-speed Flash and 128/64/32 Kbytes of SRAM, a large set of peripherals, including an 802.3 Ethernet MAC, and a CAN controller. A complete set of system functions minimizes the number of external components. The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via a parallel interface on a production programmer prior to mounting. Builtin lock bits and a security bit protect the firmware from accidental overwrite and preserve its confidentiality. The SAM7X256 system controller includes a reset controller capable of managing the power-on sequence of the microcontroller and the complete system. Correct device operation can be monitored by a built-in brownout detector and a watchdog running off an integrated RC oscillator.
- Incorporates the ARM7TDMI ARM Thumb® Processor
- High-performance 32-bit RISC Architecture
- High-density 16-bit Instruction Set
- Leader in MIPS/Watt
- EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support
- Internal High-speed Flash
- 256 Kbytes (SAM7X256) Organized in 1024 Pages of 256 Bytes (Single Plane)
- Single Cycle Access at Up to 30 MHz in Worst Case Conditions
- Prefetch Buffer Optimizing Thumb Instruction Execution at Maximum Speed
- Page Programming Time: 6 ms, Including Page Auto-erase, Full Erase Time: 15 ms
- 10,000 Write Cycles, 10-year Data Retention Capability, Sector Lock Capabilities, Flash Security Bit
- Fast Flash Programming Interface for High Volume Production
- Internal High-speed SRAM, Single-cycle Access at Maximum Speed
- 64 Kbytes (SAM7X256)
- Memory Controller (MC)
- Embedded Flash Controller, Abort Status and Misalignment Detection
- Reset Controller (RSTC)
- Based on Power-on Reset Cells and Low-power Factory-calibrated Brownout Detector
- Provides External Reset Signal Shaping and Reset Source Status
- Clock Generator (CKGR)
- Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and one PLL
- Power Management Controller (PMC)
- Power Optimization Capabilities, Including Slow Clock Mode (Down to 500 Hz) and Idle Mode
- Four Programmable External Clock Signals
- Advanced Interrupt Controller (AIC)
- Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
- Two External Interrupt Sources and One Fast Interrupt Source, Spurious Interrupt Protected
- Debug Unit (DBGU)
- 2-wire UART and Support for Debug Communication Channel interrupt, Programmable ICE Access Prevention
- Mode for General Purpose 2-wire UART Serial Communication
- Periodic Interval Timer (PIT)
- 20-bit Programmable Counter plus 12-bit Interval Counter
- Windowed Watchdog (WDT)
- 12-bit key-protected Programmable Counter
