UM1065
Hardware layout and configuration
Doc ID 018640 Rev 4
9/65
2.1 Power
supply
The STM3221G-EVAL evaluation board is designed to be powered by 5 V 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:
●
5 V DC power adapter connected to JP18, the power jack on the board
●
5 V DC power with 500 mA limitation from CN8, the USB OTG FS Micro-AB connector
●
5 V DC power with 500 mA limitation from CN9, the USB OTG HS Micro-AB connector
●
5 V DC power with 500 mA limitation from CN21, the ST-LINK/V2 USB connector
●
5 V 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.
Power related jumpers and solder bridges
Jumper
Description
JP4
Jumper reserved for future use (RFU).
Default setting: Fitted
JP32
MCU_VDD is connected to 3.3 V 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 selects one of the five possible power supply sources.
Selects 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
