AT91M42800A

Features:

• Utilizes the ARM7TDMI™ ARM^® Thumb^® Processor Core
High-performance 32-bit RISC Architecture
High-density 16-bit Instruction Set
Leader in MIPS/Watt
Embedded ICE (In-circuit Emulation)
• 8K Bytes Internal SRAM
• Fully Programmable External Bus Interface (EBI)
Maximum External Address Space of 64M Bytes
Up to 8 Chip Selects
Software Programmable 8/16-bit External Data Bus
• 8-channel Peripheral Data Controller
• 8-level Priority, Individually Maskable, Vectored Interrupt Controller
5 External Interrupts, Including a High-priority, Low-latency Interrupt Request
• 54 Programmable I/O Lines
• 6-channel 16-bit Timer/Counter
6 External Clock Inputs, 2 Multi-purpose I/O Pins per Channel
• 2 USARTs
2 Dedicated Peripheral Data Controller (PDC) Channels per USART
Support for up to 9-bit Data Transfers
• 2 Master/Slave SPI Interfaces
2 Dedicated Peripheral Data Controller (PDC) Channels per SPI
8- to 16-bit Programmable Data Length
4 External Slave Chip Selects per SPI
• 3 System Timers:
Period Interval Timer (PIT); Real-time Timer (RTT); Watchdog Timer (WDT)
• Power Management Controller (PMC)
CPU and Peripherals Can be Deactivated Individually
• Clock Generator with 32.768 kHz Low-power Oscillator and PLL
Support for 38.4 kHz Crystals
Software Programmable SystemClock (up to 33 MHz)
• IEEE 1149.1 JTAG Boundary Scan on All Active Pins
• Fully Static Operation: 0 Hz to 33 MHz Internal Frequency Range at VDDCORE = 3.0V, 85°C
• 2.7V to 3.6V Core and PLL Operating Voltage Range; 2.7V to 5.5V I/O Operating Voltage Range
• -40°C to +85°C Temperature Range
• Available in a 144-lead TQFP Package and in 144-ball BGA Package



Pinout




Description

The AT91M42800A is a member of the Atmel AT91 16/32-bit microcontroller family, which is based on the ARM7T-DMI processor core. This processor has a high-performance 32-bit RISC architecture with a high-density 16-bit instruction set and very low power consumption. In addition, a large number of internally banked registers result in very fast exception handling, making the device ideal for real-time control applications. The AT91 ARM-based MCU family also features Atmel's high-density, in-system programmable, nonvolatile memory technology. The AT91M42800A has a direct connection to off-chip memory, including Flash, through the External Bus Interface.

The Power Management Controller allows the user to adjust device activity according to system requirements, and, with the 32.768 kHz low-power oscillator, enables the AT91M42800A to reduce power requirements to an absolute minimum.The AT91M42800A is manufactured using Atmel's high-density CMOS technology.By combining the ARM7TDMI processor core with on-chip SRAM and a wide range of peripheral functions including timers, serial communication controllers and a versatile clock generator on a monolithic chip, the AT91M42800A provides a highly-flexible and cost-effective solution to many compute-intensive applications.