40. Siliziumfehler

40.1 Errata ATmega48A

The revision letter in this section refers to the revision of the ATmega48A device.

40.1.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Changed device ID

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Changed device ID

The device ID has been modified according to the to the following:

	Any die revision			Previous die revision	Revision K
	Signature byte address ID (Unchanged)			Device ID read via debugWIRE	Device ID read via debugWIRE
Part	0x000	0x001	0x002	Device ID read via debugWIRE	Device ID read via debugWIRE
ATmega48A	0x1E	0x92	0x05	0x920A	0x920A

40.1.2 Rev. E to J

Not Sampled

40.1.3 Rev. D

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

When running the device as a TWI slave with a system clock above 2MHz, the data setup time for the first bit after ACK may in some cases be too short. This may cause a false start or stop condition on the TWI line.

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.2 Errata ATmega48PA

The revision letter in this section refers to the revision of the ATmega48PA device.

40.2.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

40.2.2 Rev. E to J

Not sampled.

40.2.3 Rev. D

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MU Xes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.2.4 Rev B to C

Not Sampled

1. Power consumption in power save modes

Power consumption in power save modes will be higher due to improper control of internal power management.48

Problem Fix / Workaround

This problem will be corrected in Rev B.

2. Startup time for the device

Due to implementation of a different NVM structure, the startup sequence for the device will require longer startup time.

Problem Fix / Workaround

There is no fix for this problem.

40.3 Errata ATmega88A

The revision letter in this section refers to the revision of the ATmega88A device.

40.3.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Changed device ID
Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Changed device ID

The device ID has been modified according to the to the following:

	Any die revision			Previous die revision	Revision K
	Signature byte address ID (Unchanged)			Device ID read via debugWIRE	Device ID read via debugWIRE
Part	0x000	0x001	0x002	Device ID read via debugWIRE	Device ID read via debugWIRE
ATmega88A	0x1E	0x93	0x0A	0x930F	0x930F

5. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MU Xes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

6. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.3.2 Rev. G to J

Not sampled.

40.3.3 Rev. F

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MU Xes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.3.4 Rev. A to E

Not Sampled.

40.4 Errata ATmega88PA

The revision letter in this section refers to the revision of the ATmega88PA device.

40.4.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MU Xes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

5. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.4.2 Rev. G to J

Not sampled

40.4.3 Rev. F

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.4.4 Rev B to E

Not sampled.

40.4.5 Rev. A

Power consumption in power save modes
Startup time for the device

1. Power consumption in power save modes

Power consumption in power save modes will be higher due to improper control of internal power management.48

Problem Fix / Workaround

This problem will be corrected in Rev B.

2. Startup time for the device

Due to implementation of a different NVM structure, the startup sequence for the device will require longer startup time.

Problem Fix / Workaround

There is no fix for this problem.

40.5 Errata ATmega168A

The revision letter in this section refers to the revision of the ATmega168A device.

40.5.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Changed device ID
Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Changed device ID

The device ID has been modified according to the to the following:

	Any die revision			Previous die revision	Revision K
	Signature byte address ID (Unchanged)			Device ID read via debugWIRE	Device ID read via debugWIRE
Part	0x000	0x001	0x002	Device ID read via debugWIRE	Device ID read via debugWIRE
ATmega168A	0x1E	0x94	0x06	0x940B	0x940B

5. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MU Xes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

6. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.5.2 Rev. F to J

Not sampled.

40.5.3 Rev. E

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.5.4 Rev. A to D

Not sampled.

40.6 Errata ATmega168PA

The revision letter in this section refers to the revision of the ATmega168PA device.

40.6.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MU Xes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

5. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.6.2 Rev. F to J

Not sampled.

40.6.3 Rev E

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.6.4 Rev A to D

Not sampled.

40.7 Errata ATmega328

The revision letter in this section refers to the revision of the ATmega328 device.

40.7.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Changed device ID
Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Changed device ID

The device ID has been modified according to the to the following:

	Any die revision			Previous die revision	Revision K
	Signature byte address ID (Unchanged)			Device ID read via debugWIRE	Device ID read via debugWIRE
Part	0x000	0x001	0x002	Device ID read via debugWIRE	Device ID read via debugWIRE
ATmega328	0x1E	0x95	0x14	0x9514	0x9516

5. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUX es are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

6. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.7.2 Rev E to J

Not sampled.

40.7.3 Rev D

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUX es are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.7.4 Rev C

Not sampled.

40.7.5 Rev B

Analog MUX can be turned off when setting ACME bit
Unstable 32kHz Oscillator

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. Unstable 32kHz Oscillator

The 32kHz oscillator does not work as system clock. The 32kHz oscillator used as asynchronous timer is inaccurate.

Problem Fix / Workaround

None.

40.7.6 Rev A

Analog MUX can be turned off when setting ACME bit
Unstable 32kHz Oscillator

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. Unstable 32kHz Oscillator

The 32kHz oscillator does not work as system clock. The 32kHz oscillator used as asynchronous timer is inaccurate.

Problem Fix / Workaround

None.

40.8 Errata ATmega328P

The revision letter in this section refers to the revision of the ATmega328P device.

40.8.1 Rev K

Full swing crystal oscillator not supported
Parallel programming timing modified
Write wait delay for NVM is increased
Changed device ID
Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Full swing crystal oscillator not supported

The full swing crystal oscillator functionality is not available in revision K.

Problem Fix / Workaround

Use alternative clock sources available in the device.

2. Parallel programming timing modified

		Previous die revision				Revision K
Symbol	Parameter	Min	Typ.	Max	Units	Min	Typ.	Max	Units
t_{WLRH_CE}	/WR Low to RDY/BSY High for Chip Erase	7,5		9	ms	9,8		10,5	ms
t_BVDV	/BS1 Valid to DATA valid	0		250	ns	0		335	ns
t_OLDV	/OE Low to DATA Valid			250	ns			335	ns

3. Write wait delay for NVM is increased

The write delay for non-volatile memory (NVM) is increased as follows:

	Other revisions	Revision K
Symbol	Minimum Wait Delay	Minimum Wait Delay
t_{WD_ERASE}	9 ms	10,5 ms

4. Changed device ID

The device ID has been modified according to the to the following:

	Any die revision			Previous die revision	Revision K
	Signature byte address ID (Unchanged)			Device ID read via debugWIRE	Device ID read via debugWIRE
Part	0x000	0x001	0x002	Device ID read via debugWIRE	Device ID read via debugWIRE
ATmega328P	0x1E	0x95	0x0F	0x950F	0x9516

5. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUX es are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

6. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.8.2 Rev E to J

Not sampled.

40.8.3 Rev D

Analog MUX can be turned off when setting ACME bit
TWI Data setup time can be too short

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. TWI Data setup time can be too short

Problem Fix / Workaround

Insert a delay between setting TWDR and TWCR.

40.8.4 Rev C

Not sampled.

40.8.5 Rev B

Analog MUX can be turned off when setting ACME bit
Unstable 32kHz Oscillator

1. Analog MUX can be turned off when setting ACME bit

If the ACME (Analog Comparator Multiplexer Enabled) bit in ADCSRB is set while MUX3 in ADMUX is '1' (ADMUX[3:0]=1xxx), all MUXes are turned off until the ACME bit is cleared.

Problem Fix / Workaround

Clear the MUX3 bit before setting the ACME bit.

2. Unstable 32kHz Oscillator

The 32kHz oscillator does not work as system clock. The 32kHz oscillator used as asynchronous timer is inaccurate.

Problem Fix / Workaround

None.

40.8.6 Rev A

Unstable 32kHz Oscillator

1. Unstable 32kHz Oscillator

The 32kHz oscillator does not work as system clock. The 32kHz oscillator used as asynchronous timer is inaccurate.

Problem Fix / Workaround

None.