Datasheet

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STM32F21xxx Electrical characteristics
174
6.1.7 Current consumption measurement
Figure 18. Current consumption measurement scheme
6.2 Absolute maximum ratings
Stresses above the absolute maximum ratings listed in Table 10: Voltage characteristics,
Table 11: Current characteristics, and Table 12: Thermal characteristics may cause
permanent damage to the device. These are stress ratings only and functional operation of
the device at these conditions is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
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V
BAT
V
DD
V
DDA
I
DD
_V
BAT
I
DD
Table 10. Voltage characteristics
Symbol Ratings Min Max Unit
V
DD
–V
SS
External main supply voltage (including V
DDA
, V
DD
)
(1)
1. All main power (V
DD
, V
DDA
) and ground (V
SS
, V
SSA
) pins must always be connected to the external power
supply, in the permitted range.
–0.3 4.0
V
V
IN
Input voltage on five-volt tolerant pin
(2)
2. V
IN
maximum value must always be respected. Refer to Table 11 for the values of the maximum allowed
injected current.
V
SS
–0.3 V
DD
+4
Input voltage on any other pin V
SS
–0.3 4.0
|ΔV
DDx
| Variations between different V
DD
power pins - 50
mV
|V
SSX
− V
SS
| Variations between all the different ground pins - 50
V
ESD(HBM)
Electrostatic discharge voltage (human body model)
see Section 6.3.14:
Absolute maximum
ratings (electrical
sensitivity)