Datasheet

333
8272A–AVR–01/10
164A/164PA/324A/324PA/644A/644PA/1284/1284P
27.2 Speed Grades
Maximum frequency is depending on V
CC.
As shown in Figure 27-1, the Maximum Frequency vs.
V
CC
curve is linear between 1.8V < V
CC
< 2.7 and between 2.7V < V
CC
< 4.5.
Figure 27-1. Maximum Frequency vs. V
CC
, ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P
4 MHz
1.8V 2.7V 4.5V
10 MHz
20 MHz
5.5V
Safe Operating Area