AT91M42800 Datasheet, PDF (1/20 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 RAM
• 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 31.25 kHz and 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 (17 MHz at 1.8V)
• 1.8V to 3.6V Core Operating Voltage Range; 2.7V to 5.5V I/O Operating Voltage Range
• -40°C to +85°C Operating Temperature Range
• Available in a 144-lead TQFP Package and in 144-ball BGA Package
AT91
ARM^® Thumb^®
Microcontrollers
AT91M42800
Summary
Description
The AT91M42800 Microcontroller is a member of the Atmel AT91 16/32-bit Microcon-
troller family, which is based on the ARM7TDMI 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 reg-
isters 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 AT91M42800
has a direct connection to off-chip memory, including Flash, through the External Bus
Interface.
The Power Management Controller allows the user to adjust the device activity
according to system requirements, and, with the 32.768 kHz low-power oscillator,
enables the AT91M42800 to reduce power requirements to an absolute minimum.
The AT91M42800 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 AT91M42800 provides a highly flexible and
cost-effective solution to many compute-intensive applications.
Rev. 1328AS–06/00
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