37.3 General Operating Ratings

The device must operate within the ratings listed in this section in order for all other electrical characteristics and typical characteristics of the device to be valid.
Table 37-2. General Operating Conditions
Symbol Description Condition Min. Max. Unit
VDD Operating Supply Voltage 1.8(2) 5.5 V
T Operating temperature range(1) Standard temperature range -40 105 °C
Extended temperature range(3) -40 125
Note:
  1. Refer to the device ordering codes for the device temperature range.
  2. Operation is ensured down to 1.8V or BOD triggering level, VBOD. VBOD may be below minimum Operating Supply Voltage for some devices. Where this is the case, the device is tested down to VDD = VBOD during production.
    • During Chip Erase the BOD is forced ON. If the supply voltage VDD is below the configured VBOD, the Chip Erase will fail. See 33.3.7.1 Chip Erase.
  3. Extended temperature range is only ensured down to 2.7V.
Table 37-3. Operating Voltage and Frequency
Symbol Description Condition Min. Max. Unit
CLK_CPU Operating system clock frequency

VDD=[1.8, 5.5]V
T=[-40, 105]°C(1)

 0 5 MHz

VDD=[2.7, 5.5]V
T=[-40, 105]°C(2)

 0 10

VDD=[4.5, 5.5]V
T=[-40, 105]°C(3)

 0 20

VDD=[2.7, 5.5]V
T=[-40, 125]°C(2)

 0 8

VDD=[4.5, 5.5]V
T=[-40, 125]°C(3)

 0 16
Note:
  1. Operation ensured down to BOD triggering level, VBOD with BODLEVEL0.
  2. Operation ensured down to BOD triggering level, VBOD with BODLEVEL2.
  3. Operation ensured down to BOD triggering level, VBOD with BODLEVEL7.

The maximum CPU clock frequency depends on VDD. As shown in the following figure, the Maximum Frequency vs. VDD is linear between 1.8V < VDD < 2.7V and 2.7V < VDD < 4.5V.

Figure 37-1. Maximum Frequency vs. VDD for [-40, 105]°C