
El
ec
tri
ca
l s
ch
em
at
ic
s
S
T
M
32
F
4D
IS
C
O
VE
R
Y
32
/3
D
oc
ID
0
22
256
R
ev
2
Figur
e 1
2.
S
T-LINK/V2
(SW
D
o
n
ly
)
STMicroelectronics
Title:
Number:
Rev:
Sheet of
B.2(PCB.SCH)
Date:
1/9/2012
C6
20pF
C9
20pF
1
2
X1
8MHz
3V
USB_DM
USB_DP
STM_RST
T_J
TC
K
T_JTCK
T_J
TD
O
T_J
TD
I
T_JTMS
STM_JTMS
ST
M_
JT
CK
OSC_IN
OSC_OUT
T_N
R
S
T
R19
4K7
R20
4K7
AIN_1
C11
100nF
R18
100K
R7
100K
3V
3V
3V
SW
IM
_I
N
SW
IM
_I
N
SW
IM
_I
N
SW
IM
SW
IM
SW
IM
_R
ST
_I
N
SW
IM
_R
ST
MB997
2
6
STM32F4DISCOVERY ST-LINK/V2 (SWD only)
USB_DM
USB_DP
3V
R9
1K5
R10
0
USB
R8
100K
VCC
1
D-
2
D+
3
ID
4
GND
5
SHELL
0
CN1
5075BMR-05-SM
U5V
COM
5V
U5V
3V
R14
1K
PWR
LD2
RED
5V
JP3
Wired on Solder Side
JP2
C8
100nF
C12
100nF
C10
100nF
C7
100nF
3V
Jumpers ON --> DISCOVERY Selected
Jumpers OFF --> ST-LINK Selected
VBAT
1
PA
7
17
PC13
2
PA12
33
PC14
3
PB0
18
PC15
4
JTMS/SWDIO
34
OSCIN
5
PB1
19
OSCOUT
6
VSS_2
35
NRST
7
PB2
/BO
O
T
1
20
VSSA
8
VDD_2
36
VDDA
9
PB1
0
21
PA0
10
JT
C
K
/SW
C
L
K
37
PA1
11
PB1
1
22
PA2
12
PA
15
/JTD
I
38
PA
3
13
VS
S
_
1
23
PA
4
14
PB3
/JTD
O
39
PA
5
15
VD
D_
1
24
PA
6
16
PB4
/JN
T
R
ST
40
PB12
25
PB5
41
PB13
26
PB6
42
PB14
27
PB7
43
PB15
28
BO
OT
0
44
PA8
29
PB8
45
PA9
30
PB9
46
PA10
31
VS
S
_
3
47
PA11
32
VD
D_
3
48
U2
STM32F103C8T6
Board Ident: PC13=0
T_JTCK
T_JTMS
SWD
3V
1
2
3
4
CN3
SB3
SB2
SB5
SB4
SB7
SB6
SB9
SB8
STM_JTMS
STM_JTCK
SWCLK
SWDIO
SWD
RE
S
ERV
ED
DE
FA
ULT
3V
T_SWDIO_IN
T_SWO
LED_STLINK
LED_STLINK
3V
R4
100
R3
100
R1
0
Red
_Green
2
1
3
4
LD1
LD_BICOLOR_CMS
R12
22
R15
22
R5
10K
R6
10K
PA13
PA14
TCK/SWCLK
TMS/SWDIO
VDD
SB17
3V
R13
10K
R11
0
Not Fitted
MCO
C1
1µF_X5R_0603
C5
10nF_X7R_0603
C3
1µF_X5R_0603
C2
100nF
C4
100nF
MCO
Not Fitted
T_
JR
S
T
R69
100
1
2
3
4
5
6
CN2
Header 6
R2
100
AIN_1
T_NRST
T_SWO
NRST
PB3
R16
22
R17
22
SB11
SB12
T_NRST
T_SWO
Not Fitted
SB10
RC Must be very close to STM32F103 pin 29
2V5
C20
1µF_X5R_0603
C13
10nF_X7R_0603
C17
1µF_X5R_0603
C19
100nF
C18
100nF
5
1
2
GND
3
4
BYPASS
INH
Vin
Vout
U3
LD3985M25R
JP1
5
1
2
GND
3
4
BYPASS
INH
Vin
Vout
U1
LD3985M33R
D1
BAT60JFILM
D3
BAT60JFILM
D2
BAT60JFILM
R68
100
C61
20pF
SB on Solder Side under JP
Idd
5V
EXT_5V, Input or Output
OUT_3V, Only Output