Definition Solder Bridge
Setting
(1)
Comment
PH0 SB66
ON PH0 is connected to ST morpho CN11 pin29.
OSC_OUT
PH1
SB67
OFF PH1 is disconnected from ST morpho CN11 pin29.
ON PH1 is connected to ST morpho CN11 pin29.
I2S_B_CK/
SPI_B_SCK and
SWO
PB3
SB45
ON
PB3 is used as an I
2
S/SPI signal on Zio CN7 pin15,
but is also connected to STLINK as the SWO signal
through SB21.
OFF
PB3 is not used as an I
2
S/SPI signal on Zio CN7 pin15,
can be used as the SWO.
RMII REF CLK
PB6
SB52
ON
PB6 is connected to Ethernet as the RMII reference
clock and ST morpho CN12 pin 17: Ethernet signal
quality can be impacted.
OFF
PB6 is not connected to ST morpho CN12 pin 17 to
avoid stub on Ethernet.
1. The default configuration is in bold.
UM3276
Expansion connectors
UM3276 - Rev 1
page 31/40
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