STEVAL-STRKT01 Schematic diagrams version 1 | sheet 1
Figure 1: STEVAL-STRKT01 circuit schematic (1 of 7)
SENS_I2C_SCK
I2C1_SDA_SENS
LIV3_VDD
ST
U
SB
16
00
_I
2C
_S
D
A
SPI2_SCK/I2S2_CK/PB13
U
AR
T_
TX
U
SB
_D
M
SW
D
_S
W
C
LK
2-LIV3
LIV3_TX
SP
I2
_N
SS
/I2
S2
_W
S/
PB
12
SP
I2
_S
C
K/
I2
S2
_C
K/
PB
13
SP
I2
_M
IS
O
/I2
S2
_M
C
K/
PB
14
SP
I2
_M
O
SI
/I2
S2
_S
D
/P
B1
5
PA
4-
ST
U
SB
16
00
_R
ST
LI
V3
_W
AK
EU
P/
U
SA
R
T1
_C
K
AD
C
2/
PA
2/
LI
V3
PP
S
STBC02_NTC
1-LoRa MODULE
SPI_CS_M95
4-POWER MANAGEMENT
SW
D
_S
W
C
LK
UART1_TX
U
SB
_D
P
LIS2DW12_INT
ADC2/PA2/LIV3PPS
PB6_INT
SENS_VDD
LIV3_PPS
M
EM
_V
D
D
ST
BC
02
_S
W
_S
EL
M
EM
_V
D
D
ST
U
SB
16
00
_V
D
D
SE
N
S_
VD
D
PA8/LIV3WKUP
MEM_VDD
LE
D
_U
se
r
5-INTERFACE
SPI2_NSS/I2S2_WS/PB12
SPI2_SCK/I2S2_CK/PB13
SPI2_MISO/I2S2_MCK/PB14
SPI2_MOSI/I2S2_SD/PB15
I2C1_SDA/PB9
I2C1_SCL_1600
LORA_VDD
I2C1_SDA_1600
SW
D
_S
W
D
IO
ST
U
SB
16
00
_V
D
D
D
_V
D
D
PA4-LIV3RSTn
SPI2_NSS/I2S2_WS/PB12
PB
6-
ST
U
SB
16
00
_I
N
T
ST
BC
02
_W
KU
P2
M
C
U
SENS_I2C_SDA
LIV3_RSTn
LIV3_RX
D_VDD
SPI_MISO_M95
3-SENSORS
U
SB
_D
P
ST
U
SB
16
00
_I
2C
_S
C
K
UART1_RX
PWR_NTC
ST
BC
02
_n
C
H
G
2M
C
U
LO
R
A_
VD
D
UART1_RX
SPI2_MISO/I2S2_MCK/PB14
LI
V3
_V
D
D
SPI_MOSI_M95
SENS_I2C_SCK_SWITCH
SENS_I2C_SDA_SWITCH
SENS_INT
PB
2-
U
SE
R
_L
ED
SPI_SCK_M95
D_VDD
D
_V
D
D
ST
BC
02
_B
AT
M
S_
ad
c
Bu
tto
n_
U
se
r
MCU_WKUP/PA0
LIV3_WAKEUP
U
SB
_D
M
LI
V3
_V
D
D
M
C
U
_n
R
ST
I2C1_SCL_SENS
BA
TM
S_
AD
C
5
PB
5-
ST
BC
02
_S
W
_S
L
AD
C
3/
PA
3/
ST
BC
02
nC
H
G
LP
TI
M
1_
IN
2/
PB
7
LORA_VDD
SENS_VDD
6-MEMORY
STUSB1600_VDD
SPI2_MOSI/I2S2_SD/PB15
nR
ES
ET
UART1_TX
M
C
U
_W
KU
P
STUSB1600_VDD
U
AR
T_
R
X
SW
D
_S
W
D
IO
SE
N
S_
VD
D
D
_V
D
D
I2C1_SCL/PB8
Figure 2: STEVAL-STRKT01 circuit schematic (2 of 7)
USB_DP
2
R110
0 NM
LoRa antenna
RCC_MCO/PA8
SMD 0402
USB_DM
pi greek filter
1
51
G
N
D
3
52
VDD_USB
5
I2C1_SCL/PB8
9
PB
6/
LP
TI
M
1_
ET
R
40
LORA_VDD
LORA_VDD
SWD_SWCLK
MCU_WKUP/PA0
MCU_nRST
LPTIM1_OUT/PB2
1M
TC
X
O
_O
U
T
SPI2_NSS/I2S2_WS/PB12
A
D
C
5/
D
A
C
2/
PA
5
R
C
C
_M
C
O
/P
A
8
GND5
54
SMD 0201
L104
L NM
SMD 0201
I2C1_SDA/PB9
STUSB1600_VDD
SWD_SWCLK
MCU_nRST
PA
4/
AD
C
4/
D
AC
1
R117
44
31
STSAFE_nRST
GND
C110
15
PB
14
/S
PI
2_
M
IS
O
GND
17
PB
12
/S
PI
2_
N
SS
18
SMD 0201
24
PA
2/
AD
C
2
SMD 0402
Assembly 0Ohm resistor
C118
100nF
1
LORA_VDD
2
VDD_MCU
6
25
DBG_SX1276_DIO2
smc0201
I2C1_SCL/PB8
2
SENS_VDD
SPI2_MOSI/I2S2_SD/PB15
ADC5/DAC2/PA5
R104
0 NM
4S
2
SMD 0402
R105
0 NM
2
LPTIM1_ETR/PB6
GND
35
PB8/I2C1_SCL
36
GND
I2C1_SCL_SENS
MCU_nRST
4
DBG_CRF1/PA1
S
P
I2
_S
C
K
/I2
S
2_
C
K
/P
B
13
NX2016SA 24MHZ / EXS00A-CS05544 NOT MOUNTED
TP115
SWD_SWDIO
TP100
R122
UART1_RX
SPI2_SCK/I2S2_CK/PB13
2
11
DBG_SX1276_DIO5
12
3
ADC2/PA2
23
PA
3/
AD
C
3
D_VDD
VDD_TCXO
DBG_CRF2/PC2
D_VDD
DBG_SX1276_DIO3
4
1600_I2C_EN
TP105
1M
SWD_SWDIO
SMD 0402
MCU_nRST
R100
100K
GND10
ANT
26
0
SPI
GND
unmount)
GND
14
D
4
SWD_SWCLK
I2C1_SCL/PB8
1
3-4SEL
3S2
7
3S
1
C110 and C112 are temporarily replaced by 0OHm resistor
R107
uFL connector NM
SMD 0201
R121
PB9/I2C1_SDA
R101
10K
U
A
R
T1
_T
X
PB6_INT
ADC2/PA2/LIV3PPS
SI
G
2
I2C1_SDA_1600
GND
I2C1_SCL_1600
OSC_OUT
1-2SEL
2S1
4
D_VDD
GND
GND
55
GND7
smc0201
D_VDD
SMD 0201
46
PH
0-
O
SC
_I
N
10
DBG_SX1276_DIO4
VDD
STSAFE_nRST
GND
SENS_VDD
PA0/WKUP1
34
1
LORA_VDD
I2C1_SDA_1600
STUSB1600_VDD
D_VDD
SMD 0201
U101
LPTIM1_IN2/PB7
SMD 0201
0
LPTIM1_IN2/PB7
I2C1_SDA/PB9
Exposed pad must be soldered to a
floating plane. Do NOT connect to
power or ground.
1
D_VDD
S
P
I2
_M
O
S
I/I
2S
2_
S
D
/P
B
15
D_VDD
4S1
PB5-STBC02_SW_SL
BATMS_ADC5
USB_DM
VD
D
_T
C
XO
G
N
D
I2C1_SDA_SENS
C114
100nF
SMD 0402
C104
100nF
I2C1_SDA_1600
STSAFE_nRST
PB
5/
LP
TI
M
1_
IN
1
ANT
C102
1µF
SENS_VDD
14
PB
15
/S
PI
2_
M
O
SI
12
I2C1_SDA_SENS
smc0603
SMD 0201
SWD_SWDIO
UART1_TX
STG3692
DBG_CRF3/PC1
SMD 0201
Y100
TP112
47
TC
XO
_O
U
T
48
I2C1_SCL_SENS
TP104
R1260 NM
SMD 0201
C115
1µF
C112
I2C1_SDA_SENS
C108
10pF NM
TP111
R109
0 NM
R108
Assembly 0Ohm resistor
PB
2/
LP
TI
M
1_
O
U
T
LPTIM1_ETR/PB6
I2C1_SCL_SENS
or VDD_TCXO connection:
Option1: Connect VDD_TCXO to VDD (assembly R107-
R106 unmount)
Option2: Connect VDD_TCXO to PA12 to make sure MCU
S
P
I2
_M
IS
O
/I2
S
2_
M
C
K
/P
B
14
F
1
A
D
C
2/
PA
2
I2C1_SDA/PB9
57
DBG_SX1276_DIO3
LPTIM1_IN2/PB7
USB_DP
D
2
5
29
DBG_CRF3/PC1
30
SMD 0201
C117
100nF
41
PA
13
/S
W
D
IO
42
56
GND8
R116
1
GND
3 PA11/USB_DM
TP106
0
SENS_I2C_EN
DBG_SX1276_DIO1
TP107
0 NM R114
R113
1
GND1
TP108
R103
4K7
0 NM
13
D
BG
_S
X1
27
6_
D
IO
0
33
2
15
D
1
16
Con_SMA
C105
1µF
ADC4/DAC1/PA4
16
PB
13
/S
PI
2_
SC
K
TP110
A
D
C
4/
D
A
C
1/
PA
4
PB2-USER_LED
27
28
10
GND
11
DBG_CRF2/PC2
I2C1_SCL_1600
2S
2
6
PA12/USB_DP
2
SMD 0402
R106
0 NM
can control TCXO on/off (assembly R106- R107
SPI2_MISO/I2S2_MCK/PB14
PA
10
/U
SA
R
T1
_R
X
19
O
S
C
_I
N
OSC_IN
D_VDD
MCU_WKUP/PA0
MCU_WKUP/PA0
I2C1_SCL/PB8
ADC3/PA3
UART1_TX
DBG_SX1276_DIO4
0 NM
DBG_CRF1/PA1
38
PB
7/
LP
TI
M
1_
IN
2
39
R1180 NM
R125
10K
R124
GND11
8
GND9
43
G
N
D
SPI2_MISO/I2S2_MCK/PB14
GND
GND
VDD_RF
7
TP109
1
J100
32
VREF+
1S2
DBG_SX1276_DIO1
37
SMD 0402
U
A
R
T1
_R
X
S
P
I2
_N
S
S
/I2
S
2_
W
S
/P
B
12
TP101
CMWX1ZZABZ-078
PA8/LIV3WKUP
LPTIM1_IN1/PB5
VDD_USB
D
3
8
G
N
D
4
53
smc0603
R102
4K7
GND
USB_DP
I2
C
1_
S
D
A
/P
B
9
I2C1_SDA/PB9
DBG_SX1276_DIO5
O
S
C
_O
U
T
GND
49
G
N
D
1
50
MCU reset and wake up
Sensor connections
Power and interface
UART1_RX
SPI2_NSS/I2S2_WS/PB12
LORA_VDD
smc0603
PA
5/
AD
C
5/
D
AC
2
22
D
B
G
_S
X
12
76
_D
IO
0
PA
14
/S
W
C
LK
BO
O
T0
GND
SMD 0201
C103
10µF
VREF+
DBG_SX1276_DIO2
9
2
Vcc
0
USB_DM
D_VDD
SMD 0201
LIV3 communication
3
SMD 0201
C109
10pF NM
U100
C113
10uF
SMD 0201
L103
L NM
SPI2_MOSI/I2S2_SD/PB15
13
1S
1
LPTIM1_IN1/PB5
GND
SPI2_SCK/I2S2_CK/PB13
PA4-LIV3RSTn
SMD 0201
J101
ANT
ADC3/PA3/STBC02nCHG
STUSB1600_VDD
D_VDD
A
D
C
3/
PA
3
GND6
R
11
2
MURATA module
SWD - USB
PA
9/
U
SA
R
T1
_T
X
I²C
D_VDD
G
N
D
2
20
PA
8/
M
C
O
21
GND
3
I2
C
1_
S
C
L/
P
B
8
0 NM
0 NM
45
PH
1-
O
SC
_O
U
T
GND
LPTIM1_OUT/PB2
R
11
1
VDD_USB
SMD 0201
C116
10µF
I2C1_SCL_1600
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