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STM32WB50CG Datasheet(PDF) 79 Page - STMicroelectronics

Part # STM32WB50CG
Description  Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5.2 or 802.15.4 radio solution
PDF  119 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32WB50CG Datasheet(HTML) 79 Page - STMicroelectronics

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DS13047 Rev 5
79/119
STM32WB50CG STM32WB30CE
Electrical characteristics
110
Note:
For information on selecting the crystal refer to AN2867 “Oscillator design guide for STM8S,
STM8A and STM32 microcontrollers” available from www.st.com.
Figure 16. 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.
6.3.11
Internal clock source characteristics
The parameters given in Table 52 are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 20: General operating
conditions. The provided curves are characterization results, not tested in production.
Gmcritmax Maximum critical crystal gm
LSEDRV[1:0] = 00
Low drive capability
-
-
0.50
µA/V
LSEDRV[1:0] = 01
Medium low drive capability
-
-
0.75
LSEDRV[1:0] = 10
Medium high drive capability
-
-
1.70
LSEDRV[1:0] = 11
High drive capability
-
-
2.70
tSU(LSE)(2) Startup time
VDD stabilized
-
2
-
s
1. Guaranteed by design.
2. tSU(LSE) is the startup time measured from the moment it is enabled (by software) until a stable 32 kHz oscillation is
reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer.
Table 51. Low-speed external user clock characteristics(1) (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
MS30253V2
OSC32_IN
OSC32_OUT
Drive
programmable
amplifier
fLSE
32.768 kHz
resonator
Resonator with integrated
capacitors
CL1
CL2



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