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STM32WB35CC Datasheet(PDF) 28 Page - STMicroelectronics

No. de pieza STM32WB35CC
Descripción Electrónicos  Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5.2 and 802.15.4 radio solution
PDF  193 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32WB35CC Datasheet(HTML) 28 Page - STMicroelectronics

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Functional overview
STM32WB55xx STM32WB35xx
28/193
DS11929 Rev 11
During power up/down, the following power sequence requirements must be respected:
When VDD is below 1 V the other power supplies (VDDA, VDDUSB, VLCD), must remain
below VDD + 300 mV
When VDD is above 1 V all power supplies are independent.
Figure 6. Power-up/down sequence
1. VDDX refers to any power supply among VDDA, VDDUSB and VLCD.
During the power down phase, VDD can temporarily become lower than other supplies only
if the energy provided to the MCU remains below 1 mJ. This allows the external decoupling
capacitors to be discharged with different time constants during the power down transient
phase.
Note:
VDD, VDDRF and VDDSMPS must be wired together, so they can follow the same voltage
sequence.
MSv47490V1
0.3
1
VBOR0
3.6
Operating mode
Power-on
Power-down
time
V
VDDX
(1)
VDD
Invalid supply area
VDDX < VDD + 300 mV
VDDX independent from VDD



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