STM32L162VD Datasheet, PDF (71/115 Pages) STMicroelectronics – AES 128-bit encryption hardware accelerator

STM32L162VD-X
Electrical characteristics
Low-speed external user clock generated from an external source
The characteristics given in the following table result from tests performed using a low-
speed external clock source, and under the conditions summarized in Table 12.
Symbol
Table 26. Low-speed external user clock characteristics⁽¹⁾
Parameter
Conditions
Min
Typ
Max Unit
f_{LSE_ext}
User external clock source
frequency
V_LSEH
OSC32_IN input pin high level
voltage
V_LSEL
OSC32_IN input pin low level
voltage
t_w(LSEH)
t_w(LSEL)
OSC32_IN high or low time
t_r(LSE)
t_f(LSE)
OSC32_IN rise or fall time
C_IN(LSE) OSC32_IN input capacitance
1. Guaranteed by design.
1
32.768 1000 kHz
0.7V_DD
-
V_DD
V
-
V_SS
-
0.3V_DD
465
-
-
-
-
ns
10
-
-
0.6
-
pF
Figure 11. Low-speed external clock source AC timing diagram
WZ/6(+
9/6(+


9/6(/
WU/6(
WI/6(
WZ/6(/
W
7/6(
069
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 1 to 24 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on
characterization results obtained with typical external components specified in Table 27. In
the application, the resonator and the load capacitors have to be placed as close as
possible to the oscillator pins in order to minimize output distortion and startup stabilization
time. Refer to the crystal resonator manufacturer for more details on the resonator
characteristics (frequency, package, accuracy).
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