Datasheet
DS12110 Rev 5 165/231
STM32H743xI Electrical characteristics
199
General PCB design guidelines
Power supply decoupling should be performed as shown in Figure 41 or Figure 42,
depending on whether V
REF+
is connected to V
DDA
or not. The 100 nF capacitors should be
ceramic (good quality). They should be placed them as close as possible to the chip.
Figure 41. Power supply and reference decoupling (V
REF+
not connected to V
DDA
)
1. V
REF+
input is available on all package whereas the V
REF–
s available only on UFBGA176+25 and
TFBGA240+25. When V
REF-
is not available, it is internally connected to V
DDA
and V
SSA
.
Figure 42. Power supply and reference decoupling (V
REF+
connected to V
DDA
)
1. V
REF+
input is available on all package whereas the V
REF–
s available only on UFBGA176+25 and
TFBGA240+25. When V
REF-
is not available, it is internally connected to V
DDA
and V
SSA
.
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