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STM32F405 Fiches technique(PDF) 137 Page - STMicroelectronics

No de pièce STM32F405
Description  Arm® Cortex®-M4 32b MCUFPU, 210DMIPS, up to 1MB Flash/1924KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera
PDF  204 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F405 Fiches technique(HTML) 137 Page - STMicroelectronics

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DS8626 Rev 9
137/203
STM32F405xx, STM32F407xx
Electrical characteristics
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 51 or Figure 52,
depending on whether VREF+ is connected to VDDA or not. The 10 nF capacitors should be
ceramic (good quality). They should be placed them as close as possible to the chip.
Figure 51. Power supply and reference decoupling (VREF+ not connected to VDDA)
1. VREF+ and VREF– inputs are both available on UFBGA176. VREF+ is also available on LQFP100, LQFP144,
and LQFP176. When VREF+ and VREF– are not available, they are internally connected to VDDA and VSSA.
STM32F
1 μF // 10 nF
1 μF // 10 nF
VREF+
(1)
VDDA
VSSA/VREF-
(1)
ai17535b



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