STMicroelectronics 32L4R9IDISCOVERY - Page 51

UM2271 Solder bridges
DocID030906 Rev 2 51/78
SB5 (RESERVED) ON Reserved, do not modify (PSRAM)
SB14 (RESERVED) ON Reserved, do not modify (STLINK)
SB9, SB10, SB11, SB12
(RESERVED)
ON Reserved, do not modify (display)
SB15 (RESERVED) ON Reserved, (USB OTG FS)
SB30 (RESERVED) ON Reserved, (Audio Codec VL)
SB29 (RESERVED) ON Reserved, (Audio Codec VD)
SB31 (RESERVED) ON Reserved, do not modify (MFX, IDD_VDD_MCU)
SB22 (RESERVED) ON Reserved, do not modify (STMod+/PMOD)
SB26 (RESERVED) ON Reserved, (OCTOSPI Flash)
SB37 (RESERVED) ON Reserved, (EXT_I2C)
SB28 (RESERVED) OFF Reserved, (MCO to HSE input)
SB38 (RESERVED) ON Reserved, (for U5 PSRAM)
SB39 (RESERVED) OFF Reserved, (for U6 PSRAM)
Table 30. 32L4R9IDISCOVERY solder bridges (continued)
Solder bridges State Description