Datasheet

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STM32F745xx STM32F746xx Electrical characteristics
195
5.3.6 Over-drive switching characteristics
When the over-drive mode switches from enabled to disabled or disabled to enabled, the
system clock is stalled during the internal voltage set-up.
The over-drive switching characteristics are given in Table 23. They are sbject to general
operating conditions for T
A
.
5.3.7 Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, ambient temperature, I/O pin loading, device software configuration,
operating frequencies, I/O pin switching rate, program location in memory and executed
binary code.
The current consumption is measured as described in Figure 23: Current consumption
measurement scheme.
All the run-mode current consumption measurements given in this section are performed
with a reduced code that gives a consumption equivalent to CoreMark code.
1. Guaranteed by design.
2. The reset temporization is measured from the power-on (POR reset or wakeup from V
BAT
) to the instant
when first instruction is read by the user application code.
Table 23. Over-drive switching characteristics
(1)
1. Guaranteed by design.
Symbol Parameter Conditions Min Typ Max Unit
Tod_swen
Over_drive switch
enable time
HSI - 45 -
µs
HSE max for 4 MHz
and min for 26 MHz
45 - 100
External HSE
50 MHz
- 40 -
Tod_swdis
Over_drive switch
disable time
HSI - 20 -
HSE max for 4 MHz
and min for 26 MHz.
20 - 80
External HSE
50 MHz
- 15 -
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