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UM1461
Hardware layout and configuration
Doc ID 022138 Rev 1
9/65
2.1 Power
supply
STM3240G-EVAL evaluation board is designed to be powered by 5V DC power supply and
to be protected by PolyZen from a wrong power plug-in event. It is possible to configure the
evaluation board to use any of following five sources for the power supply:
●
5V DC power adapter connected to CN18, the Power Jack on the board
●
5V DC power with 500 mA limitation from CN8, the USB OTG FS Micro-AB connector
●
5V DC power with 500 mA limitation from CN9, the USB OTG HS Micro-AB connector
●
5V DC power with 500 mA limitation from CN21, the ST-LINK/V2 USB connector
●
5V DC power from both CN1 and CN3, the extension connector for daughterboard
(DTB for daughterboard on silkscreen)
The power supply is configured by setting the related jumpers JP4, JP32, JP18 and JP19 as
described in
Table 1
.
Table 1.
Power related jumpers and solder bridges
Jumper
Description
JP4
JP4 should be fitted to enable power down reset (PDR). PDR is disabled when JP4
is not fitted.
Default setting: Fitted.
JP32
MCU_VDD is connected to 3.3V power when JP32 is closed and MCU current
consumption measurement can be done manually by multi-meter when JP32 is
open.
Default setting: Fitted.
JP18
JP18 is used to select one of the five possible power supply sources.
To select the ST-LINK/V2 USB connector (CN21) power
supply, set JP18 as shown:
(Default setting)
To select power supply jack (CN18) power supply, set
JP18 as shown:
To select daughterboard connector (CN1 and CN3) power
supply, set JP18 as shown:
HS
FS
DTB
PSU
STlk
HS
FS
DTB
PSU
STlk
HS
FS
DTB
PSU
STlk
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