STMicroelectronics B-G474E-DPOW1 Manual page 42

SB name
SB16
SB17
SB18
SB19
SB20
SB21
SB22
SB23
SB24
SB25
SB26
SB27
SB28
SB29
SB30
UM2577 - Rev 2
(1) Function
Status
ON
PB3 connection to T_SWO
OFF
ON
VREF+ / VREFP connection to VDDA /
AVDD
OFF
ON
VREF+ / VREFP connection to VREF
PWR
OFF
ON
PD2 connection to
USBPD_550mA_PROTECT
OFF
ON
PC12 connection to
5V_USBPD_1A_PROTECT
OFF
ON
VDDA / AVDD connection to VDD
OFF
ON
VDDA / AVDD connection to 3V3
OFF
ON
PC11 connection to T_VCP_RX
OFF
ON
PC10 connection to T_VCP_TX
OFF
ON
AGND to GND connection near STM32
OFF
ON
PB11 connection to
BUCKBOOST_I_IN_SENSE
OFF
ON
PA14 connection to T_SWCLK
OFF
ON
PA15 connection to T_JTDI
OFF
ON
PA13 connection to T_SWDIO
OFF
ON
3V3 connection to 3V3_OUT
OFF
Comment
Connect PB3 to T_SWO
Isolate PB3 from T_SWO, PB3 can be used for any
other applications at the CN9 extension connector.
Connect VREF+ / VREFP to VDDA / AVDD
Isolate VREF+ / VREFP from VDDA / AVDD
Connect VREF+ / VREFP to VREF PWR
Isolate VREF+ / VREFP from VREF PWR
Connect PD2 to USBPD_550mA_PROTECT
Isolate PD2 from USBPD_550mA_PROTECT, PD2
can be used for any other applications at the CN9
extension connector.
Connect PC12 to 5V_USBPD_1A_PROTECT
Isolate PC12 from 5V_USBPD_1A_PROTECT, PC12
can be used for any other applications at the CN9
extension connector.
Connect VDDA / AVDD to VDD
Isolate VDDA / AVDD from VDD
Connect VDDA / AVDD to 3V3
Isolate VDDA / AVDD from 3V3
Connect PC11 to T_VCP_RX
Isolate PC11 from T_VCP_RX, PC11 can be used for
any other applications at the CN9 extension connector.
Connect PC10 to T_VCP_TX
Isolate PC10 from T_VCP_TX, PC10 can be used for
any other applications at the CN9 extension connector.
Connect AGND to GND plan near STM32
Isolate AGND from GND plan near STM32
Connect PB11 to BUCKBOOST_I_IN_SENSE
Isolate PB11 from BUCKBOOST_I_IN_SENSE, PB11
can be used for any other applications at the CN8
extension connector.
Connect PA14 to T_SWCLK
Isolate PA14 from T_SWCLK, PA14 can be used for
any other applications at the CN9 extension connector.
Connect PA15 to T_JTDI
Isolate PA15 from T_JTDI, PA15 can be used for any
other applications at the CN9 extension connector.
Remove R89 if necessary.
Connect PA13 to T_SWDIO
Isolate PA13 from T_SWDIO, PA13 can be used for
any other applications at the CN9 extension connector.
Connect 3V3 to 3V3_OUT on the CN8 extension
connector.
3V3_OUT is not powered on the CN8 extension
connector.
UM2577
Solder bridges
page 42/54