AT91M42800A Datasheet, PDF (1/23 Pages) ATMEL Corporation – AT91 ARM Thumb Microcontrollers

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 System Clock (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
AT91
ARM^® Thumb^®
Microcontrollers
AT91M42800A
Summary
Description
The AT91M42800A is a member of the Atmel AT91 16/32-bit microcontroller family,
which is based on the ARM7TDMI processor core. This processor has a high-perfor-
mance 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 pro-
grammable, nonvolatile memor y 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.
Rev. 1779BS–ATARM–02/02
Note: This is a summary document. A complete document is ₁
available on our web site at www.atmel.com.