AT91SAM7S256-MU 32位ARM单片机QFN-64封装

Status	Production
Flash (Bytes)	256K
SRAM (Bytes)	64K
RTC/RTT	-/1
10-bit ADC Channels	8
Peripheral DMA Channels	11
Max. Clock Speed (MHz)	55
I/O Pins	32
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
I/O Voltage Domain (V)	3.3
In-System Programming	Y
Single Supply	Y
Pb-Free Packages	LQFP 64 QFN 64

AT91SAM7S256-MU 描述

TheAT91SAM7S256 is a low pincount Flash microcontroller 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 64K bytes of SRAM. The integrated proprietary SAM-BA Boot Assistant enables in-system programming of the embedded 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 55MHz. Typical core supply is 1.8V, I/Os are supplied at 1.8V or 3.3V and are 5V tolerant. An integrated Voltage Regulator permits single supply at 3.3V. The AT91SAM7S256 is supplied in a 64-lead LQFP or QFN Green package. It is supported by an Evaluation Board and extensive application development tools. TheAT91SAM7S256 is a general-purpose microcontroller, providing an ideal migration path for 8-bit applications requiring additional performance, USB connectivity and extended memory.

• 512KB 系统内可编程Flash存储器: AT91SAM7S512
• 256KB 系统内可编程Flash存储器: AT91SAM7S256
• 128KB 系统内可编程Flash存储器: AT91SAM7S128
• 64KB 系统内可编程Flash存储器: AT91SAM7S64
• 32KB 系统内可编程Flash存储器: AT91SAM7S321
• 32KB 系统内可编程Flash存储器: AT91SAM7S32
• 16KB 系统内可编程Flash存储器: AT91SAM7S161
• 16KB 系统内可编程Flash存储器: AT91SAM7S16

AT91SAM7S256-MU 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 (AT91SAM7S512) Organized in Two Contiguous Banks of 1024 Pages of 256 Bytes (Dual Plane)
  – 256 kbytes(AT91SAM7S256) Organized in 1024 Pages of 256 Bytes (Single Plane)
  – 128 Kbytes (AT91SAM7S128) Organized in 512 Pages of 256 Bytes (Single Plane)
  – 64 Kbytes (AT91SAM7S64) Organized in 512 Pages of 128 Bytes (Single Plane)
  – 32 Kbytes (AT91SAM7S321/32) Organized in 256 Pages of 128 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 (AT91SAM7S512/256)
  – 32 kbytes (AT91SAM7S128)
  – 16 kbytes (AT91SAM7S64)
  – 8 kbytes (AT91SAM7S321/32)
• Memory Controller (MC)
  – Embedded Flash Controller, Abort Status and Misalignment Detection
• Reset Controller (RSTC)
  – Based on Power-on Reset and Low-power Factory-calibrated Brown-out 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)
  – Software 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 (AT91SAM7S512/256/128/64/321) or One (AT91SAM7S32) External Interrupt
  Source(s) 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
• 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
• One Parallel Input/Output Controller (PIOA)
  – Thirty-two (AT91SAM7S512/256/128/64/321) or twenty-one (AT91SAM7S32) 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
• Eleven (AT91SAM7S512/256/128/64/321) or Nine (AT91SAM7S32) Peripheral DMA Controller (PDC) Channels
• One USB 2.0 Full Speed (12 Mbits per Second) Device Port (Except for the AT91SAM7S32).
  – On-chip Transceiver, 328-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 (AT91SAM7S512/256/128/64/321) or One (AT91SAM7S32) 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 (AT91SAM7S512/256/128/64/321)
• One Master/Slave Serial Peripheral Interface (SPI)
  – 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
• One Three (AT91SAM7S512/256/128/64/321)-channel or Two (AT91SAM7S32)-channel 16-bit Timer/Counter (TC)
  – Three (AT91SAM7S512/256/128/64/321) or One (AT91SAM7S32) External Clock Input(s), 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 Mode Support Only, All Two-wire Atmel EEPROMs Supported
• One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os
  SAM-BA™ Boot Assistant
  – Default Boot program
  – Interface with SAM-BA Graphic User Interface
• IEEE® 1149.1 JTAG Boundary Scan on All Digital Pins
• 5V-tolerant I/Os, including 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
  – 3.3V or 1.8V VDDIO I/O Lines Power Supply, Independent 3.3V VDDFLASH Flash Power Supply
  – 1.8V VDDCORE Core Power Supply with Brown-out Detector
• Fully Static Operation: Up to 55 MHz at 1.65V and 85°C Worst Case Conditions
• Available in 64-lead LQFP Green or 64-pad QFN Green Package (AT91SAM7S512/256/128/64/321) and 48-lead LQFP Green or
  48-pad QFN Green Package (AT91SAM7S32)

AT91SAM7S256-MU 订购型号

Ordering Code	Package	Package Type	Operating Temperature Range
AT91SAM7S256-AU-001	LQFP 64	Green	Industrial (-40° C to 85° C)
AT91SAM7S256-MU	QFN 64	Green	Industrial (-40° C to 85° C)

AT91SAM7S256-MU 应用技术支持与电子电路设计开发资源下载

1. AT91SAM7S256数据手册DataSheet 下载. PDF(简洁版)
2. AT91SAM7S256英文数据手册DataSheet 下载. PDF(完整版)
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.