at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 307

• Manufacturer Part Number: at90pwm81-16se
• Description: 8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
• Manufacturer: ATMEL Corporation

29.3
7734M–AVR–03/10
Errata AT90PWM81 revC
•
•
•
•
•
•
•
•
5. Flash and EEPROM programming failure if CPU clock is switched
6. ADC AMPlifier measurement is unstable
7. ADC measurement reports abnormal values with PSC2-synchronized
8. Over-consumption in power down sleep mode.
If Clock switching is used in the Application, the memory programming is only possible when
the internal RC oscillator is selected as System clock.
If the Application requires a memory programming on a clock source different from the inter-
nal RC oscillator, do not switch to this clock source.
Work around:
- Use internal RC oscillator when programming Flash and EEPROM,
or
- Do not use clock switching.
When switching from a single-ended ADC channel to an Amplified channel, noise can
appear on ADC conversion.
Work around:
After switching from a single ended to an amplified channel, discard the first ADC
conversion.
When using ADC in synchronized mode, an unexpected extra Single ended conversion can
spuriously re-start.This can occur when the End of conversion and the Trigger event occur
at the same time.
Work around:
No workaround
In Power-down mode, an extra power consumption up to 500µA may occur.
Work around:
No workaround
Clock Switch disable
Crystal oscillator control with Clock Switch
BOD disable fuse
PSC output at Reset
Flash and EEPROM programming failure if CPU clock is switched
ADC AMPlifier measurement is unstable
ADC measurement reports abnormal values with PSC2-synchronized conversions
Over-consumption in power down sleep mode.
conversions
AT90PWM81
307