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By default, the
2.0 compatibility with all the main microcontroller families. However, for the L4 family (NUCLEO-L412RB-P,
NUCLEO-L433RC-P, NUCLEO-L452RE-P, and NUCLEO-L476RG), you have to remove and replace them with
SH11 and SH13 solder bridges.
D+/- lines are used as data lines (the SH22 solder bridge is opened by default). Short them for source only by
closing the SH22 solder bridge except for 5 V, 0.5 A source in order to ensure compatibility with the USB BC 1.2
standard.
1.2.3
ST morpho and Arduino UNO V3 connectors
The figure below shows the ST morpho and Arduino UNO V3 connectors of the
board. It details the main connections, functions, and configuration settings.
R31
CN7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
ESQ-119-14-T-D
CC lines are connected to the UCPD connection of the ST morpho connectors (CN7 CN10).
Two configurations are possible depending on the CC line connection to ST morpho connectors. To release the
STM32 pins, disconnect unused lines by removing R26/R25 or R24/R27.
An STM32 GPIO manages the
1.2.4
5 V only current capability
When the STM32 does not embed the UCPD peripheral, it is possible to manage a 5 V only source. JP2 and JP3
are then connected to CC1-5V and CC2-5V, respectively.
Resistor table 1 and table 2 indicate the 5 V current capability:
•
R35/R39 mounted (default configuration): 0.5 A max. at 5 V (36 kΩ pullup to 3.3 V);
•
R35/R39 not mounted and SH18/SH20 closed: 1.5 A max. at 5 V (12 kΩ pullup to 3.3 V);
•
R35/R39 not mounted and SH19/SH21 closed: 3.0 A max. at 5 V (4.7 kΩ pullup to 3.3 V).
UM2973 - Rev 1
X-NUCLEO-SRC1M1
expansion board mounts R19 and R20 resistors fitted to guarantee USB
Figure 8.
ST morpho and Arduino UNO V3 connectors
3.3V
5 V
CN6
0
1
2
3
4
5
6
7
8
SSQ-108-03-F-S
GND
NRST
CC1
ADC_Vbusc
R40
2
ADC_Prov
3
100
ADC_Isense
CC1-5V
CN8
1
2
3
4
5
6
SSQ-106-03-G-S
CC2
R41
2
3
100
CC2-5V
TCPP02-M18
CN5
10
9
8
7
6
5
4
3
2
1
SSQ-110-03-F-S
I2C1_SCL
I2C1_SDA
CC1_G4
R24
0
JP2
R25
0
1
CC1_G0
JUMPER_3PIN
DP_XX
FLGN
CN9
8
7
6
5
4
3
2
JP3
1
SSQ-108-03-F-S
1
JUMPER_3PIN
(U1) ENABLE PIN. You can also connect it directly to 3.3 V.
UM2973
Hardware architecture
X-NUCLEO-SRC1M1
expansion
CN10
1
2
ENABLE
3
4
5
6
7
8
9
10
11
12
DP_G4
13
14
DM_G4
15
16
17
18
19
20
21
22
23
24
R26
0
25
26
CC2_G0
27
28
29
30
31
32
33
34
35
36
37
38
ESQ-119-14-T-D
GND
R27 0
CC2_G4
page 7/25
GND
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