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STM32L4P5CE Datasheet(PDF) 188 Page - STMicroelectronics

Part # STM32L4P5CE
Description  Ultra-low-power Arm® Cortex®-M4 32-bit MCUFPU, 150 DMIPS, up to 1-MB Flash memory, 320-KB SRAM, LCD-TFT, ext. SMPS
PDF  311 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L4P5CE Datasheet(HTML) 188 Page - STMicroelectronics

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Electrical characteristics
STM32L4P5xx
188/311
DS12903 Rev 2
Note:
For information on selecting the crystal, refer to the application note AN2867 “Oscillator
design guide for ST microcontrollers” available from the ST website www.st.com.
Figure 32. Typical application with a 32.768 kHz crystal
Note:
An external resistor is not required between OSC32_IN and OSC32_OUT and it is forbidden
to add one.
Table 58. LSE oscillator characteristics (fLSE = 32.768 kHz)(1)
1. Guaranteed by design.
Symbol
Parameter
Conditions(2)
2. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator
design guide for ST microcontrollers”.
Min
Typ
Max
Unit
IDD(LSE) LSE current consumption
LSEDRV[1:0] = 00
Low drive capability
-250
-
nA
LSEDRV[1:0] = 01
Medium low drive capability
-315
-
LSEDRV[1:0] = 10
Medium high drive capability
-500
-
LSEDRV[1:0] = 11
High drive capability
-630
-
Gmcritmax
Maximum critical crystal
gm
LSEDRV[1:0] = 00
Low drive capability
--
0.5
µA/V
LSEDRV[1:0] = 01
Medium low drive capability
--
0.75
LSEDRV[1:0] = 10
Medium high drive capability
--
1.7
LSEDRV[1:0] = 11
High drive capability
--
2.7
tSU(LSE)(3)
3.
tSU(LSE) is the startup time measured from the moment it is enabled (by software) to a stabilized
32.768 kHz oscillation is reached. This value is measured for a standard crystal and it can vary significantly
with the crystal manufacturer
Startup time
VDD is stabilized
-
2
-
s
MS30253V2
OSC32_IN
OSC32_OUT
Drive
programmable
amplifier
fLSE
32.768 kHz
resonator
Resonator with integrated
capacitors
CL1
CL2



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