STMicroelectronics B-G474E-DPOW1, Руководство пользователя

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15 Jumpers and solder bridges
15.1 Jumpers
The jumper functions and their default status are described in Table 21
Table 21. Jumper configuration
Reference Jumper (1) Function Comment
JP1
[1-2] VIN connected to USBPD
Connect buck
‑
boost VIN to the V
BUS
from USB Type-
C
®
when the double switch is activated
OFF VIN free for use
Enable the use of an external power supply as
buck
‑
boost VIN input voltage
[2-3] VIN connected to GND Deactivate buck
‑
boost function, VIN not accessible
JP4
ON 3V3 connected to VDD
3.3 V powers VDD. It is impossible to measure the
current.
OFF
3V3 not connected to
VDD
VDD is not powered. Add an ammeter to measure the
current.
JP5
STLK
5 V is supplied from USB
STLK CN3
• 5 V (+/- 5 %),
• 700 mA embedded overcurrent protection
• Up to 500 mA capable
CHGR
5 V is supplied from USB
STLK CN3
• 5 V (+/- 5 %)
• No embedded current protection
• Up to 1.5 A current recommended
USBC
5 V is supplied from
LTC3114-1 5 V converter
(Power source connected
to USB Type-C
®
CN2
connector)
• 5 V (+/- 3 %)
• Embedded selectable current protection (Up to
950 mA on 5 V, up to 1.5 A on USB Type-C
®
V
BUS
)
• USB Type-C
®
V
BUS
nominal voltage from 5 V to
15 V
E5V
5 V is supplied from 5V_I
pin of CN9 extension
connector
• 5 V (+/- 5 %)
• No embedded current protection
• Up to 1.5 A current recommended
JP6 (2)
OFF STLINK-V3E Active state STLINK-V3E detects USBSTLK plug on CN3
ON STLINK-V3E Reset state
Set STLINK-V3E in Reset mode (All input/outputs in
high impedance)
JP7
(2)
ON
T_NRST (PA6)
STLINK-V3E output reset connected to T_NRST of
STM32
OFF
STLINK-V3E output reset isolated from T_NRST of
STM32
1. The default setting is in bold.
2. JP6 and JP7 must not be ON together
UM2577
Jumpers and solder bridges
UM2577 - Rev 2
page 40/54