AT91SAM7S256D-AU ARM Microcontrollers MCU 256K Flash SRAM 64K ARM based MCU
♠ Product Description
| Product Attribute | Attribute Value |
| Manufacturer: | Microchip |
| Product Category: | ARM Microcontrollers - MCU |
| RoHS: | Details |
| Series: | SAM7S/SE |
| Mounting Style: | SMD/SMT |
| Package / Case: | LQFP-64 |
| Core: | ARM7TDMI |
| Program Memory Size: | 256 kB |
| Data Bus Width: | 32 bit/16 bit |
| ADC Resolution: | 10 bit |
| Maximum Clock Frequency: | 55 MHz |
| Number of I/Os: | 32 I/O |
| Data RAM Size: | 64 kB |
| Supply Voltage - Min: | 1.65 V |
| Supply Voltage - Max: | 1.95 V |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 85 C |
| Packaging: | Tray |
| Analog Supply Voltage: | 3.3 V |
| Brand: | Microchip Technology / Atmel |
| Data RAM Type: | RAM |
| Height: | 1.6 mm |
| I/O Voltage: | 1.65 V to 3.6 V |
| Interface Type: | I2C, SPI, USART, USB |
| Length: | 7 mm |
| Moisture Sensitive: | Yes |
| Number of ADC Channels: | 8 Channel |
| Number of Timers/Counters: | 3 Timer |
| Processor Series: | SAM7S |
| Product: | MCU |
| Product Type: | ARM Microcontrollers - MCU |
| Program Memory Type: | Flash |
| Factory Pack Quantity: | 160 |
| Subcategory: | Microcontrollers - MCU |
| Watchdog Timers: | Watchdog Timer |
| Width: | 7 mm |
| Unit Weight: | 0.012088 oz |
♠ AT91SAM ARM-based Flash MCU
Atmel’s SAM7S is a series of low pincount Flash microcontrollers based on the 32-bit ARM RISC processor. It features a high-speed Flash and an SRAM, a large set of peripherals, including a USB 2.0 device (except for the SAM7S32 and SAM7S16), and a complete set of system functions minimizing the number of external components.
The device is an ideal migration path for 8-bit microcontroller users looking for additional performance and extended memory. 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. Built-in lock bits and a security bit protect the firmware from accidental overwrite and preserves its confidentiality.
The SAM7S Series 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.
The SAM7S Series are general-purpose microcontrollers. Their integrated USB Device port makes them ideal devices for peripheral applications requiring connectivity to a PC or cellular phone. Their aggressive price point and high level of integration pushes their scope of use far into the cost-sensitive, high-volume consumer market.
• 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 (SAM7S512) Organized in Two Contiguous Banks of 1024 Pages of 256 Bytes (Dual Plane)
– 256 Kbytes (SAM7S256) Organized in 1024 Pages of 256 Bytes (Single Plane)
– 128 Kbytes (SAM7S128) Organized in 512 Pages of 256 Bytes (Single Plane)
– 64 Kbytes (SAM7S64) Organized in 512 Pages of 128 Bytes (Single Plane)
– 32 Kbytes (SAM7S321/32) Organized in 256 Pages of 128 Bytes (Single Plane)
– 16 Kbytes (SAM7S161/16) Organized in 256 Pages of 64 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 (SAM7S512/256)
– 32 Kbytes (SAM7S128)
– 16 Kbytes (SAM7S64)
– 8 Kbytes (SAM7S321/32)
– 4 Kbytes (SAM7S161/16)
• 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 (SAM7S512/256/128/64/321/161) or One (SAM7S32/16) 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
– 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
– 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 (SAM7S512/256/128/64/321/161) or twenty-one (SAM7S32/16) 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 (SAM7S512/256/128/64/321/161) or Nine (SAM7S32/16) Peripheral DMA Controller (PDC) Channels
• One USB 2.0 Full Speed (12 Mbits per Second) Device Port (Except for the SAM7S32/16).
– 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 (SAM7S512/256/128/64/321/161) or One (SAM7S32/16) 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 (SAM7S512/256/128/64/321/161)
• One Master/Slave Serial Peripheral Interface (SPI)
– 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
• One Three-channel 16-bit Timer/Counter (TC)
– Three External Clock Input and Two Multi-purpose I/O Pins per Channel (SAM7S512/256/128/64/321/161)
– One External Clock Input and Two Multi-purpose I/O Pins for the first Two Channels Only (SAM7S32/16)
– 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 and I2 C Compatible Devices Supported (SAM7S512/256/128/64/321/32)
– Master, Multi-Master and Slave Mode Support, All Two-wire Atmel EEPROMs and I2 C Compatible Devices Supported (SAM7S161/16)
• 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 (SAM7S161/16 I/Os Not 5V-tolerant)
• 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 (SAM7S512/256/128/64/321/161) and 48-lead LQFP Green or 48-pad QFN Green Package (SAM7S32/16)
