
UM1690 Rev 3
11/27
UM1690
Hardware layout
26
Figure 4. Bottom layout
MSv33269V2
SB5
STM_RST
JP2
SB1, 3, 6, 8
Reserved
P2
connector
SB11,12
RX, TX
SB2, 4, 7, 9
Default
SB16
VDDIO2
SB19
MCO
SB20, 23
USB-USER
SB22
B2-RESET
P1
connector
SB10
NRST
SB15
VBAT
SB13, 14
X2 crystal
SB17, 18
X3 crystal
SB21
B1-USER
SB24, 25
GND, VDD
SB26
VDDA
SB27-32
Touch sensor