| AT91M42800A |
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| The AT91M42800A features 8K bytes of on-chip SRAM, an External Bus Interface, a 6-channel Timer/Counter, 2 USARTs, 2 Master/Slave SPI Interfaces, 3 System Timers and an advanced Power Management Controller. |
| Status |
Production |
| SRAM (Bytes) |
8K |
| External Bus Interface |
1 |
| RTC/RTT |
-/1 |
| Peripheral DMA Channels |
8 |
| Max. Clock Speed (MHz) |
33 |
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LBGA 144
LQFP 144
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More |
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|  Check Distributor Inventory |
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ARM7TDMI Technical Reference Manual
(284 pages, updated 04/01)
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AT91M42800A Summary
(27 pages, revision E, updated 04/06)
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AT91M42800A
(224 pages, revision D, updated 04/06)
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AT91M42800A Electrical Characteristics
(22 pages, updated 6/02)
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AT91M42800A Errata Sheet V1.0 Errata
(6 pages, updated 1/02)
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AT91 Assembler Code Startup Sequence for C Code Applications Software
(16 pages, revision A, updated 6/02)
Provides a C startup sequence written in assembler code and based on the C startup sequence for the AT91 Evaluation Board working with the ARM ADS V1.1 Development Tools.
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AT91-AN01: Using the Two-wire interface (TWI) in Master Mode on AT91SAM Microcontrollers
(32 pages, revision B, updated 08/07)
This application note is an aid for developers in the
design of a system using the Two-wire Interface (TWI) of Atmel's AT91SAM family of microcontroller products with Atmel's Two-wire Interface slave devices and I2C-Bus compatible slave devices.
It describes the connection with a digital temperature sensor (LM75), a Real Time Clock (DS1337), a Graphic LCD Module(PCF8558) and a 1Mbit Two-wire Serial EEPROM (AT24C1024).
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Connecting an I2S-Compatible Audio DAC to the AT91x40 Series Microcontroller
(13 pages, revision A, updated 5/02)
Provides the procedure to construct the interface between a stero audio digital-to-analog converter and an AT91x40 Series Microcontroller.
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Software DMA Implementation
(8 pages, revision A, updated 10/98)
Describes two different ways to implement a DMA function in software using the ARM Fast Interrupt (FIQ) as the external event.
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AT91 Reset Considerations
(19 pages, updated 7/02)
Describes the reset state of an AT91 in order to help the user in the initial configuration of an AT91-based system.
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AT91 Timing Calculator User Notes
(6 pages, revision B, updated 02/06)
Describes the use of a spreadsheet to calculate all the timing parameters of specific AT91 devices.
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 Other Related Application Notes |
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Evaluation Kit:
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AT91EB42
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Software Files:
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AT91M42800A_bsd.zip
Boundary-Scan Description files (BSD) for the AT91M42800A in TQFP and BGA package.
IBIS Model software not available. |
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ATMEL_PLL_LFT_Filter_CALCULATOR_AT91_2v9.zip
Excel spreadsheet allowing calculation of the best R-C-C component values on the PLL Loop Back Filter.
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PLL Filter Calculator for AT91M42800A
Excel spreadsheet allowing calculation of the best R-C-C component values on the PLL Loop Back Filter. |
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AT91EB42 |
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AT91SAM Product Guide
(Brochure, 2 pages, revision F, updated 5/09)
Product selection guide to Atmel's AT91SAM microcontrollers that give immediate access to market-leading ARM processors. |
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Atmel's ARM-based Microcontroller - Low Power for Portable Systems
(White Paper, 7 pages, revision A, updated 4/01)
In the hand-held systems market, the lowest power consumption is mandatory. Atmel has responded to this challenge with the numerous advanced power-saving features in its AT91 range of ARM-based Microcontrollers. |
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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. |
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