Schematics

Voltage Regulator
USB ESD Protection
Micro USB Connector
STM32L1 VCOM Interface
Crystal and Bypass capacitors
STM32L151CBT6
USBLC6-2P6
10u
18p 18p
7A-8.000MAAJ-T
GND GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
GND
100n
1u 100n
GNDGND GND GND
1u
GND
LD39015M33R
GND
47k
100n
GND
BAT54C
0
0
VDDA
9
VDD_1
24
VDD_2
36
VDD_3
48
VLCD
1
BOOT0
44
PA0-WKUP1
10
PA1
11
PA2
12
PA3
13
PA4
14
PA5
15
PA6
16
PA7
17
PA8
29
PA9
30
PH0-OSC_IN
5
PA10
31
PA11
32
PA12
33
PA13
34
PC14-OSC32_IN
3
PA14
37
PA15
38
VSS_1
23
VSS_2
35
VSS_3
47
VSSA
8
PB0
18
PB1
19
PB2
20
PB3
39
PB4
40
PB5
41
PB6
42
PB7
43
PB8
45
PB9
46
PB10
21
PB11
22
PB12
25
PB13
26
PB14
27
PB15
28
NRST
7
PH1-OSC_OUT
6
P-C13_RTC_AF1-WKUP2
2
PC15-OSC32_OUT
4
U1
GND
2
I/O1
6
I/O1.
1
I/O2
4
I/O2.
3
VBUS
5
U2
C1
C2 C3
X1
C4 C5 C6 C7 C8
C9
C10 C11
C12
IN
1
OUT
5
EN
3
GND
2
U3
R3
C13
D1
R15
R16
P1
1
P2
2
P3
3
P4
4
P5
5
G1
M1
G2
M2
G3
S1
G4
S2
G5
S3
G6
S4
USB
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
BOOT
RESETN
VDD_MCU
VDD_MCU
VDD_MCU
VDD_MCU
VDD_MCU
VDD_MCU VDD_MCU VDD_MCU VDD_MCU VDD_MCU
VDD_MCU
VDD_MCU
VDD_MCU
JTMS
JTCK
JTDO
JTDI
USBDM
USBDM
USBDP
USBDP
VUSB
VUSB
VUSB
VUSB
DM
DM
DP
DP
OSC_OUT
OSC_OUT
OSC_IN
OSC_IN
NRST_MCU
NRST_MCU
5V_V3
UART_RX_STM32
UART_TX_STM32
STEVAL-BCN002V1D
7/23/2018 11:02 AM
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Sheet:
A
B
C
D
1 2 3 4 5 6
A
B
C
D
1 2 3 4 5 6
Micro USB