ATXMEGA128A4_1012 Datasheet, PDF (63/108 Pages) ATMEL Corporation – 8/16-bit XMEGA A4 Microcontroller

34.3 Speed
XMEGA A4
Table 34-2. Operating voltage and frequency
Symbol Parameter
Condition
Min
Typ
Max
Units
V_CC = 1.6V
0
V_CC = 1.8V
0
Clk_CPU
CPU clock frequency
V_CC = 2.7V
0
V_CC = 3.6V
0
12
12
MHz
32
32
The maximum CPU clock frequency of the XMEGA A4 devices is depending on V_CC. As shown
in Figure 34-1 on page 63 the Frequency vs. V_CC curve is linear between 1.8V < V_CC < 2.7V.
Figure 34-1. Operating Frequency vs.Vcc
MHz
32
Safe Operating Area
12
1.6 1.8
2.7
3.6
V
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