ATmega640/1280/1281/2560/2561
37. Errata
37.1 ATmega640 rev. A
• Inaccurate ADC conversion in differential mode with 200x gain
• High current consumption in sleep mode
1. Inaccurate ADC conversion in differential mode with 200x gain
With AVCC < 3.6V, random conversions will be inaccurate. Typical absolute accuracy may
reach 64 LSB.
Problem Fix/Workaround
None
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.
37.2 ATmega1280 rev. A
• Inaccurate ADC conversion in differential mode with 200x gain
• High current consumption in sleep mode
1. Inaccurate ADC conversion in differential mode with 200x gain
With AVCC < 3.6V, random conversions will be inaccurate. Typical absolute accuracy may
reach 64 LSB.
Problem Fix/Workaround
None
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.
37.3 ATmega1281 rev. A
• Inaccurate ADC conversion in differential mode with 200x gain
• High current consumption in sleep mode
1. Inaccurate ADC conversion in differential mode with 200x gain
With AVCC < 3.6V, random conversions will be inaccurate. Typical absolute accuracy may
reach 64 LSB.
Problem Fix/Workaround
None
431
2549L–AVR–08/07
ATMEL [ ATMEL ]
