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AT91SAM7S256

Status: Not Recommended for new designs

Features:

  • ARM7TDMI® ARM® Thumb® Processor 32-bit RISC Architecture
  • High-density 16-bit Instruction Set
  • EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support
  • 256 Kbytes, Organized in 1024 Pages of 256 Bytes (Single Plane)
  • 64 Kbytes embedded SRAM, Single-cycle Access at Maximum Speed  
  • Memory Controller (MC)
  • Memory Protection Unit
  • Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components
  • Based on Power-on Reset Cells and Low-power Factory-calibrated Brownout Detector
  • Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and One PLL
  • Power Management Controller (PMC)
  • Advanced Interrupt Controller (AIC)
  • Two-wire UART and Support for Debug Communication Channel interrupt, Programmable ICE Access Prevention
  • 20-bit Programmable Counter plus 12-bit Interval Counter
  • Windowed Watchdog (WDT)
  • Real-time Timer (RTT)
  • 32 Parallel Input/Output Controllers (PIO)
  • Eleven Peripheral DMA Controller (PDC) Channels
  • Four High-current Drive I/O lines, Up to 16 mA Each
  • 64-lead LQFP
  • 64-pad QFN
  • One Synchronous Serial Controller (SSC)
  • Two Universal Synchronous/Asynchronous Receiver Transmitters (USART)
  • One Master/Slave Serial Peripheral Interfaces (SPI)
  • One USB 2.0 Full Speed (12 Mbits per second) Device Port
  • One Three-channel 16-bit Timer/Counter (TC)
  • One Four-channel 16-bit PWM Controller (PWMC)
  • One Two-wire Interface (TWI)
  • One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os
  • 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
  • SAM-BA - Interface with SAM-BA Graphic User Interface
  • IEEE® 1149.1 JTAG Boundary Scan on All Digital Pins
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Overview
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Development Environment
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RoHS Information
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Device Overview

Summary

Microchip's ARM®-based SAM7S256 is a member of the SAM7S series of flash microcontrollers based on the 32-bit ARM7TDMI RISC processor.

It operates at a maximum speed of 55MHz and features 128KB of flash memory and 64KB of SRAM.

The peripheral set includes a Full Speed USB device and Phy at 12Mbps, UART, two USARTs, TWI (I2C), SPI, SSC, two PWM timers, three 16-bit timers, RTT, 8x10-bit ADC and 32 IO lines. It achieves single-cycle instruction access from embedded flash at 27 MIPS.

The multi-layer bus matrix, multiple SRAM banks, PDC, and DMA support parallel tasks and maximize data throughput.

The SAM7S256 operates from 1.65V to 3.6V and is available in 64-pin LQFP and QFN packages.

Additional Features

    Microcontroller Features

    Core

    • ARM7TDMI® ARM® Thumb® Processor 32-bit RISC Architecture

    • High-density 16-bit Instruction Set

    • EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support

    Memories

    • 256 Kbytes, Organized in 1024 Pages of 256 Bytes (Single Plane)

    • 64 Kbytes embedded SRAM, Single-cycle Access at Maximum Speed  

    • Memory Controller (MC)

    • Memory Protection Unit

    System

    • Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components

    • Based on Power-on Reset Cells and Low-power Factory-calibrated Brownout Detector

    • Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and One PLL

    • Power Management Controller (PMC)

    • Advanced Interrupt Controller (AIC)

    • Two-wire UART and Support for Debug Communication Channel interrupt, Programmable ICE Access Prevention

    • 20-bit Programmable Counter plus 12-bit Interval Counter

    • Windowed Watchdog (WDT)

    • Real-time Timer (RTT)

    • 32 Parallel Input/Output Controllers (PIO)

    • Eleven Peripheral DMA Controller (PDC) Channels

    • Four High-current Drive I/O lines, Up to 16 mA Each

    Package

    • 64-lead LQFP

    • 64-pad QFN

    Peripheral Features

    • One Synchronous Serial Controller (SSC)

    • Two Universal Synchronous/Asynchronous Receiver Transmitters (USART)

    • One Master/Slave Serial Peripheral Interfaces (SPI)

    • One USB 2.0 Full Speed (12 Mbits per second) Device Port

    • One Three-channel 16-bit Timer/Counter (TC)

    • One Four-channel 16-bit PWM Controller (PWMC)

    • One Two-wire Interface (TWI)

    Analog Features

    • One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os

    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

    Debugger Development Support

    • SAM-BA - Interface with SAM-BA Graphic User Interface

    • IEEE® 1149.1 JTAG Boundary Scan on All Digital Pins

Parametrics
Name
Value
Part Family
AT91SAM7S256
Max CPU Speed MHz
55
Program Memory Size (KB)
256
SRAM (KB)
64
Temperature Range (C)
-40 to 85
Operating Voltage Range (V)
3 to 3.6
Direct Memory Access Channels
11
SPI
1
I2C
1
Peripheral Pin Select / Pin Muxing
Yes
Number of USB Modules
1
ADC Input
8
Max ADC Resolution (Bits)
10
Max ADC Sampling Rate (ksps)
384
Input Capture
3
Max 16-bit Digital Timers
3
Internal Oscillator
32Khz
Max I/O Pins
32
Pincount
64

Documents

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Data Sheet

Application Notes

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Product Document

01/01/2010
411KB

User Guides

Development Environment

  • Demo & Evaluation Boards
  • Application Examples
Demo & Evaluation Boards
SAM-ICE
SAM-ICE ( AT91SAM-ICE )

SAM-ICE is a JTAG emulator designed for SAMA5, SAM3, SAM4, SAM7 and SAM9 ARM® core-based MCUs and MPUs, including Thumb mode. It supports download speeds up to 720K Bytes per second and maximum JTAG speeds up to 12 MHZ. It also supports Serial Wire Debug (SWD) and Serial Wire Viewer (SWV) from SAM-ICE hardware V6.

Learn More
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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
AT91SAM7S256D-AU
0.166700
1.087500
64
LQFP
10x10x1.4mm
Matte Tin
e3
AT91SAM7S256D-AU-999
0.166700
0.366667
64
LQFP
10x10x1.4mm
Matte Tin
e3
AT91SAM7S256D-MU-999
0.224700
0.225143
64
VQFN
9x9x1mm
Matte Tin
e3
AT91SAM7S256D-MU
0.224700
0.969231
64
VQFN
9x9x1mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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