AT91M42800A 32位ARM单片机

AT91M42800A 产品描述

The AT91M42800A is a member of theAtmel AT91 16/32-bit microcontroller 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 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.

TheAT91M42800A 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 theAT91M42800A to reduce power requirements to an absolute minimum.

TheAT91M42800A 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.

AT91M42800A 参数

1. Status:Production
2. SRAM (Bytes):8K
3. USART/DBGU:2/-
4. Max. Clock Speed (:33
5. I/O Pins:54
6. External Bus Inter:1
7. Peripheral DMA Cha:8
8. SPI:2
9. 16-bit Timers:6
10. Period Interval Ti :1
11. Watchdog Timer :1
12. RTC/RTT :-/1
13. Crystal Oscillator :1/2
14. ARM Core :7TDMI
15. I/O Voltage Domain: 3.3/5.0
16. Single Supply : Y
17. 绿色封装: LBGA 144 LQFP 144

AT91M42800A 特点

• 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 Reque
• 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 LQFP Package (Green) and a 144-ball BGA Package (RoHS  compliant)

AT91M42800A 订购型号

AT91M42800A 技术支持

1. AT91M42800A 英文数据手册DataSheet 下载. PDF (完整版)
2. ARM7TDMI 技术白皮书
3. AT91SAM 系列产品选型指南(Brochure, 2 pages, revision E, updated 2/09)
   Product selection guide to Atmel's AT91SAM microcontrollers that give immediate access to market-leading ARM processors.
4. Atmel's ARM-based Microcontroller Excels in Real-Time (White Paper, 6 pages, revision A, updated 3/01)
   Applications such as mobile communicators, PDAs, solid-state music players and internet appliances demand the best possible real-time performance. Atmel's AT91 series of ARM-based microcontrollers incorporates a number of advanced features that enhance the real-time performance of the ARM7TDMI core, making it ideal for applications of this nature.