UM2179 datasheet(30/48 Pages) STMICROELECTRONICS

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Hardware layout and configuration

UM2179

30/48

UM2179 Rev 9

All the other solder bridges present on the STM32 Nucleo-144 board are used to configure

several I/Os and power supply pins for compatibility of features and pinout with the target

STM32 supported.

STM32 Nucleo-144 boards are delivered with the solder bridges configured according to the

target STM32 supported.

SB158, SB167 (AVDD)

ON, OFF AVDD on STM32 is connected to VDD.

OFF, ON AVDD on STM32 is connected to VDD_MCU.

SB142 (PA11), SB143

(PA12)

These pins are used as D+ and D- on USB connector CN14.

OFF

These pins are used as GPIOs on ST morpho connectors.

SB149 (VREF+)

VREF+ on STM32 is connected to AVDD.

OFF

VREF+ on STM32 is disconnected to AVDD.

SB144 (QSPI_IO1)

These pins are connected to ST morpho connector CN11.

OFF

These pins are disconnected from ST morpho connector CN11

to avoid stub of QSPI_IO1 signals on PCB.

JP2(2) (STM_RST)

OFF

No incidence on ST-LINK STM32F103CBT6 NRST signal.

ST-LINK STM32F103CBT6 NRST signal is connected to GND

(ST-LINK reset to reduce power consumption).

JP3 (NRST)

Board RESET signal (NRST) is connected to ST-LINK reset

control I/O (T_NRST).

OFF

Board RESET signal (NRST) is not connected to ST-LINK reset

control I/O (T_NRST).

SB122, SB121, SB127

(VDD_MCU)

ON,

OFF,OFF

VDD_MCU is connected to VDD directly (3.3 V fixed).

OFF, ON,

VDD_MCU is connected to output of DC-DC (1.8 V fixed).

1. Default SBx state is shown in bold.

2. The jumper JP2 is not mounted on the board by default.

Table 10. Configuration of the solder bridges and jumpers (continued)

Bridge/jumper

State(1)

Description

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