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ATMEGA1281-16AU Datasheet(PDF) 29 Page - ATMEL Corporation

Part No. ATMEGA1281-16AU
Description  8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
Download  37 Pages
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA1281-16AU Datasheet(HTML) 29 Page - ATMEL Corporation

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21
2549LS–AVR–08/07
ATmega640/1280/1281/2560/2561
2.
High current consumption in sleep mode.
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
9.4
ATmega2560 rev. E
No known errata.
9.5
ATmega2560 rev. D
Not sampled.
9.6
ATmega2560 rev. C
High current consumption in sleep mode
1.
High current consumption in sleep mode.
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
9.7
ATmega2560 rev. B
Not sampled.
9.8
ATmega2560 rev. A
Non-Read-While-Write area of flash not functional
Part does not work under 2.4 volts
Incorrect ADC reading in differential mode
Internal ADC reference has too low value
IN/OUT instructions may be executed twice when Stack is in external RAM
EEPROM read from application code does not work in Lock Bit Mode 3
1.
Non-Read-While-Write area of flash not functional
The Non-Read-While-Write area of the flash is not working as expected. The problem is
related to the speed of the part when reading the flash of this area.
Problem Fix/Workaround
- Only use the first 248K of the flash.
- If boot functionality is needed, run the code in the Non-Read-While-Write area at maximum
1/4th of the maximum frequency of the device at any given voltage. This is done by writing
the CLKPR register before entering the boot section of the code
2.
Part does not work under 2.4 volts
The part does not execute code correctly below 2.4 volts


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