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AT91SAM7SE256 32位ARM单片机

Status	Production
Flash (Bytes)	256K
SRAM (Bytes)	32K
Image Sensor Interface	1
RTC/RTT	-/1
10-bit ADC Channels	8
Peripheral DMA Channels	11
Max. Clock Speed (MHz)	48
I/O Pins	88
SDRAM Interface	1
NAND Flash ECC	1/1
Enhanced USART	2
USART/DBGU	-/1
SPI	1
TWI	1
SSC	1
USB Device	FS
PWM Controller	4
High Current Pads	4
16-bit Timers	3
Period Interval Timer	1
Watchdog Timer	1
Power-On-Reset	1
Brown Out Detection	1
On-chip RC Oscillator	1
Crystal Oscillator/PLL	1/1
ARM Core	7TDMI
MMU/MPU	MPU
I/O Voltage Domain (V)	3.3
In-System Programming	Y
Single Supply	Y
Pb-Free Packages	LQFP 128 LFBGA 144

AT91SAM7SE256 描述

The AT91SAM7SE256 is a Flash microcontroller with external memory bus based on the 32-bit ARM7TDMI RISC processor. It features 256K bytes of embedded high-speed Flash with sector lock capabilities and a security bit, and 32K bytes of SRAM. The integrated proprietary SAM-BA Boot Assistant enables in-system programming of the embedded Flash. The external businterface supports SDRAM and static memories including CompactFlash and ECC-enabled NAND Flash.

Its extensive peripheral set includes a USB 2.0 Full Speed Device Port, USARTs, SPI, SSC, TWI and an 8-channel 10-bit ADC. Its Peripheral DMA Controller channels eliminate processor bottlenecks during peripheral-to-memory transfers. Its System Controller manages interrupts, clocks, power, time, debug and reset, significantly reducing the external chip count and minimizing power consumption. In industrial temperature, worse case conditions the maximum clock frequency is 48MHz. Typical core supply is 1.8V, I/Os are supplied at 1.8V or 3.3V. An integrated Voltage Regulator permits single supply at 3.3V. The AT91SAM7SE256 is supplied in a 128-lead LQFP Green Package, or a 144-ball Green Package. It is supported by an Evaluation Board and extensive application development tools. The AT91SAM7SE256 is a general-purpose microcontroller, particularly suited to applications requiring high performance, USB connectivity and extended on- and off-chip memory.

• 512KB 系统内可编程Flash存储器: AT91SAM7SE512
• 256KB 系统内可编程Flash存储器: AT91SAM7SE256
• 32KB 系统内可编程Flash存储器: AT91SAM7SE32

AT91SAM7SE256 特性

• 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
  – 512 Kbytes, Organized in Two Contiguous Banks of 1024 Pages of 256 Bytes Dual
  Plane (AT91SAM7SE512)
  – 256 Kbytes (AT91SAM7SE256) Organized in One Bank of 1024 Pages of 256 Bytes
  Single Plane (AT91SAM7SE256)
  – 32 Kbytes (AT91SAM7SE32) Organized in One Bank of 256 Pages of 128 Bytes
  Single Plane (AT91SAM7SE32)
  – 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 Erase Cycles, 10-year Data Retention Capability, Sector Lock Capabilities,
  Flash Security Bit
  – Fast Flash Programming Interface for High Volume Production
• 32 Kbytes (AT91SAM7SE512/256) or 8 Kbytes (AT91SAM7SE32) of Internal
  High-speed SRAM, Single-cycle Access at Maximum Speed
• One External Bus Interface (EBI)
  – Supports SDRAM, Static Memory, Glueless Connection to CompactFlash® and
  ECC-enabled NAND Flash
• Memory Controller (MC)
  – Embedded Flash Controller
  – Memory Protection Unit
  – 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
  – Three 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)
  – Two-wire UART and Support for Debug Communication Channel interrupt,
  Programmable ICE Access Prevention
• Periodic Interval Timer (PIT)
  – 20-bit Programmable Counter plus 12-bit Interval Counter
• Windowed Watchdog (WDT)
  – 12-bit key-protected Programmable Counter
  – Provides Reset or Interrupt Signals to the System
  – Counter May Be Stopped While the Processor is in Debug State or in Idle Mode
• Real-time Timer (RTT)
  – 32-bit Free-running Counter with Alarm
  – Runs Off the Internal RC Oscillator
• Three Parallel Input/Output Controllers (PIO)
  – Eighty-eight Programmable I/O Lines Multiplexed with up to Two Peripheral I/Os
  – Input Change Interrupt Capability on Each I/O Line
  – Individually Programmable Open-drain, Pull-up Resistor and Synchronous Output
  – Schmitt Trigger on All inputs
• Eleven Peripheral DMA Controller (PDC) Channels
• One USB 2.0 Full Speed (12 Mbits per second) Device Port
  – On-chip Transceiver, Eight Endpoints, 2688-byte Configurable Integrated FIFOs
• One Synchronous Serial Controller (SSC)
  – Independent Clock and Frame Sync Signals for Each Receiver and Transmitter
  – I²S Analog Interface Support, Time Division Multiplex Support
  – High-speed Continuous Data Stream Capabilities with 32-bit Data Transfer
• Two Universal Synchronous/Asynchronous Receiver Transmitters (USART)
  – Individual Baud Rate Generator, IrDA® Infrared Modulation/Demodulation
  – Support for ISO7816 T0/T1 Smart Card, Hardware Handshaking, RS485 Support
  – Full Modem Line Support on USART1
• One Master/Slave Serial Peripheral Interfaces (SPI)
  – 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
• One Three-channel 16-bit Timer/Counter (TC)
  – Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel
  – Double PWM Generation, Capture/Waveform Mode, Up/Down Capability
• One Four-channel 16-bit PWM Controller (PWMC)
• One Two-wire Interface (TWI)
  – Master, Multi-Master and Slave Mode Support, All Two-wire Atmel EEPROMs Supported
  – General Call Supported in Slave Mode
• One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os
• SAM-BA®
  – Default Boot program
  – Interface with SAM-BA Graphic User Interface
• IEEE® 1149.1 JTAG Boundary Scan on All Digital Pins
• Four High-current Drive I/O lines, Up to 16 mA Each
• Power Supplies
  – Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components
  – 1.8V or 3,3V VDDIO I/O Lines Power Supply, Independent 3.3V VDDFLASH Flash Power Supply
  – 1.8V VDDCORE Core Power Supply with Brownout Detector
• Fully Static Operation:
  – Up to 55 MHz at 1.8V and 85°C Worst Case Conditions
  – Up to 48 MHz at 1.65V and 85°C Worst Case Conditions
• Available in a 128-lead LQFP Green Package, or a 144-ball LFBGA RoHS-compliant Package

AT91SAM7SE256 订购型号

Ordering Code	Package	Package Type	Operating Temperature Range
AT91SAM7SE256-AU	LQFP128	Green	Industrial (-40° C to 85° C)
AT91SAM7SE256-CU	LFBGA144	Green	Industrial (-40° C to 85° C)

AT91SAM7SE256 应用技术支持与电子电路设计开发资源下载

1. AT91SAM7SE256 数据手册DataSheet 下载. PDF（完整版）
2. AT91SAM7SE256 数据手册DataSheet 下载. PDF（简洁版）
3. ARM7TDMI 技术白皮书
4. AT91SAM 系列产品选型指南(Brochure, 2 pages, revision E, updated 2/09)
   Product selection guide to Atmel's AT91SAM microcontrollers that give immediate access to market-leading ARM processors.
5. Atmel's ARM-based Microcontroller Excels in Real-Time (White Paper, 6 pages, revision A, updated 3/01)
   Applications such as mobile communicators, PDAs, solid-state music players and internet appliances demand the best possible real-time performance. Atmel's AT91 series of ARM-based microcontrollers incorporates a number of advanced features that enhance the real-time performance of the ARM7TDMI core, making it ideal for applications of this nature.