STM32F303XD Datasheet, PDF (89/173 Pages) STMicroelectronics – ARM Cortex-M4 32b MCU+FPU, up to 512KB Flash, 80KB SRAM, FSMC, 4 ADCs, 2 DAC ch., 7 comp, 4 Op-Amp, 2.0-3.6 V

STM32F303xD STM32F303xE
Electrical characteristics
Table 37. Low-speed external user clock characteristics
Symbol
Parameter
Conditions
Min
Typ
Max Unit
f_{LSE_ext}
User External clock source
frequency⁽¹⁾
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⁽¹⁾
t_r(LSE)
t_f(LSE)
OSC32_IN rise or fall time⁽¹⁾
1. Guaranteed by design, not tested in production.
-
32.768 1000 kHz
0.7V_DD
-
V_DD
V
V_SS
-
0.3V_DD
450
-
-
-
-
ns
50
Figure 16. Low-speed external clock source AC timing diagram
9/6(+
9/6(/


WU/6(
WZ/6(+
WI/6(
7/6(
WZ/6(/
W
069
DocID026415 Rev 5
89/173
151