Det är INTE så, visst är de bra men det är även AVR´s datablad.
Säkerligen är även övriga processorfamiljers datablad också helt ok, inget jag vet
men jag påstår heller inte att de är sk..t
Att endast PIC har errata och är unikt är helt felaktigt
Kritik av processorer är i sig konstruktivt men det får ju i allafall vara
korrekt och relevant, inte hörsägen.
Swech
31. Errata
The revision letter in this section refers to the revision of the ATmega8A device.
31.1 ATmega8A, rev. L
• First Analog Comparator conversion may be delayed
• Interrupts may be lost when writing the timer registers in the asynchronous timer
• Signature may be Erased in Serial Programming Mode
• CKOPT Does not Enable Internal Capacitors on XTALn/TOSCn Pins when 32 KHz Oscillator is
Used to Clock the Asynchronous Timer/Counter2
• Reading EEPROM by using ST or STS to set EERE bit triggers unexpected interrupt request
1. First Analog Comparator conversion may be delayed
If the device is powered by a slow rising VCC, the first Analog Comparator conversion will
take longer than expected on some devices.
Problem Fix / Workaround
When the device has been powered or reset, disable then enable theAnalog Comparator
before the first conversion.
2. Interrupts may be lost when writing the timer registers in the asynchronous timer
The interrupt will be lost if a timer register that is synchronous timer clock is written when the
asynchronous Timer/Counter register (TCNTx) is 0x00.
Problem Fix / Workaround
Always check that the asynchronous Timer/Counter register neither have the value 0xFF nor
0x00 before writing to the asynchronous Timer Control Register (TCCRx), asynchronous
Timer Counter Register (TCNTx), or asynchronous Output Compare Register (OCRx).
3. Signature may be Erased in Serial Programming Mode
If the signature bytes are read before a chiperase command is completed, the signature may
be erased causing the device ID and calibration bytes to disappear. This is critical, especially,
if the part is running on internal RC oscillator.
Problem Fix / Workaround:
Ensure that the chiperase command has exceeded before applying the next command.
