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STM32L4 Datasheet(PDF) 22 Page - STMicroelectronics

Part # STM32L4
Description  This module presentation presents the key differences between the STM32L4 and the STM32L476/L486 devices.
PDF  33 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L4 Datasheet(HTML) 22 Page - STMicroelectronics

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Power Supply
• DSI power supply for STM32L4R9xx/S9xx
• DSI (Display Serial Interface) power supply pins
• VDDDSI an independent DSI power supply dedicated to
the DSI regulator and MIPI DPHY
•
It must be connected to VDD
•
VCAPDSI the DSI regulator (1.2V) output
•
It must be connected to VDD12DSI.
• VDD12DSI used to supply the MIPI D-PHY, clock and
data lanes
•
A 2.2 µF must be connected to VDD12DSI
• VSSDSI is an isolated ground supply used for DSI sub-
system
• If DSI is not used:
• VDDDSI must be connected to VDD
• VCAPDSI and VDD12DSI can be left floating
• VSSDSI must be grounded
21
VDDIO2
VDDA
VDDA domain
Core
SRAMs
Digital
peripherals
VDDIO2 domain
LSE crystal 32K osc
BKP registers
RCC BDCR registers
RTC
Backup domain
VSSA
VSS
I/O ring
PG[15:2]
VDDIO2
VSS
DSI
Voltage regulator
VDDDSI
VCAPDSI
DSI PHY
VDD12DSI
VDDUSB
VCORE domain
VDD domain
I/O ring
VDDIO1
Reset block
Temp. sensor
3 x PLL, HIS, MSI
Standby circuitry
(Wakeup logic, IWDG)
Voltage regulator
Flash memory
VCORE
VDD
VSS
VBAT
Low voltage detector
USB transceivers
A/D converter
D/A converter
Comparators
OPAMP
Voltage reference
buffer
The STM32L4R9xx/S9xx devices feature the DSI (Display
Serial Interface) sub-system and it uses several power
supply pins which are independent from the other supply
pins: VDDDSI, VCAPDSI and VDD12DSI.
If DSI peripheral is not used, the VDDDSI must be
connected to VDD while VCAPDSI and VDD12DSI can be
left floating.
21



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