(Hong Kong)
Product Summary
The AT91SAM7S256-AY is a low pincount Flash microcontroller. The AT91SAM7S256-AY is based on the 32-bit ARM RISC processor. The AT91SAM7S256-AY features a 256 Kbyte high-speed Flash and a 64 Kbyte SRAM, a large set of peripherals, including a USB 2.0 device, and a complete set of system functions minimizing the number of external components. The device of the AT91SAM7S256-AY is an ideal migration path for 8-bit microcontroller users looking for additional performance and extended memory.
Parametrics
AT91SAM7S256-AY absolute maximum ratings: (1)RC Oscillator ranges between 22 KHz and 42 KHz; (2)Main Oscillator frequency ranges between 3 and 20 MHz; (3)Main Oscillator can be bypassed; (4)PLL output ranges between 80 and 200 MHz.
Features
AT91SAM7S256-AY features: (1)Incorporates the ARM7TDMI ARM Thumb Processor; (2)256 Kbytes of Internal High-speed Flash, Organized in 1024 Pages of 256 Bytes; (3)64 Kbytes of Internal High-speed SRAM, Single-cycle Access at Maximum Speed; (4)Memory Controller; (5)Reset Controller; (6)Clock Generator; (7)Power Management Controller; (8)Advanced Interrupt Controller; (9)Debug Unit (DBGU); (10)Periodic Interval Timer (PIT); (11)Windowed Watchdog (WDT); (12)Real-time Timer (RTT); (13)One Parallel Input/Output Controller (PIOA) ; (14)Eleven Peripheral Data Controller (PDC) Channels; (15)One USB 2.0 Full Speed (12 Mbits per second) Device Port; (16)One Synchronous Serial Controller (SSC); (17)Two Universal Synchronous/Asynchronous Receiver Transmitters; (18)One Master/Slave Serial Peripheral Interface (SPI); (19)One Three-channel 16-bit Timer/Counter (TC); (20)One Four-channel 16-bit PWM Controller (PWMC); (21)One Two-wire Interface; (22)One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os; (23)IEEE 1149.1 JTAG Boundary Scan on All Digital Pins; (24)5V-tolerant I/Os, including Four High-current Drive I/O lines, Up to 16 mA Each; (25)Power Supplies; (26)Fully Static Operation: Up to 55 MHz at 1.65V and 85℃ Worst Case Conditions; (27)Available in a 64-lead LQFP Package.
Diagrams
