Datasheet

ATmega48A/PA/88A/PA/168A/PA/328/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002061A-page 643
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
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.
40.2.4 Rev B to C
Not Sampled
40.2.5 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.
Other revisions Revision K
Symbol Minimum Wait Delay Minimum Wait Delay
t
WD_ERASE
9ms 10.5ms