ST STM32H74xI/G User Manual

AN4938 Rev 4 19/46
AN4938 Power supplies
45
Figure 8. NRST circuitry timing example
2.3.7 Bypass mode
The power management unit can be bypassed. This feature can be configured by software.
When bypassed, the core power supply should be provided through VCAPx
pins connected
together.
In Bypass mode, the internal voltage scaling is not managed internally, and the external
volt
age value must be consistent with the targeted maximum frequency (see datasheet for
the actual VOS level).
In Stop mode, the best trade-off between po
wer consumption and performance can be
obtained by preselecting the SVOS level in the PWR_CR1 register (refer to the product
datasheet for details on SVOS level).
In Standby mode the external source will
be switched off and the V
CORE
domains powered
down. The external source will be switched on when exiting Standby mode.
In Bypass mode, the external voltage must be pr
esent before or at the same time as V
DD
. To
avoid conflict with the LDO, the external voltage must be kept above 1.15 V until the LDO is
dis
abled by software.
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ST STM32H74xI/G Specifications

General

Brand	ST
Model	STM32H74xI/G
Category	Microcontrollers
Language	English