Datasheet

DS9773 Rev 4 51/93
STM32F030x4/x6/x8/xC Electrical characteristics
75
where
I
SW
is the current sunk by a switching I/O to charge/discharge the capacitive load
V
DDIOx
is the I/O supply voltage
f
SW
is the I/O switching frequency
C is the total capacitance seen by the I/O pin: C = C
INT
+ C
EXT
+ C
S
C
S
is the PCB board capacitance including the pad pin.
The test pin is configured in push-pull output mode and is toggled by software at a fixed
frequency.
6.3.6 Wakeup time from low-power mode
The wakeup times given in Table 30 are the latency between the event and the execution of
the first user instruction. The device goes in low-power mode after the WFE (Wait For
Event) instruction, in the case of a WFI (Wait For Interruption) instruction, 16 CPU cycles
must be added to the following timings due to the interrupt latency in the Cortex M0
architecture.
The SYSCLK clock source setting is kept unchanged after wakeup from Sleep mode.
During wakeup from Stop or Standby mode, SYSCLK takes the default setting: HSI 8 MHz.
The wakeup source from Sleep and Stop mode is an EXTI line configured in event mode.
The wakeup source from Standby mode is the WKUP1 pin (PA0).
All timings are derived from tests performed under the ambient temperature and supply
voltage conditions summarized in
Table 21: General operating conditions.
Table 29. Switching output I/O current consumption
Symbol Parameter Conditions
(1)
1. C
S
= 7 pF (estimated value).
I/O toggling
frequency (f
SW
)
Typ Unit
I
SW
I/O current
consumption
V
DDIOx
= 3.3 V
C
EXT
= 0 pF
C = C
INT
+ C
EXT
+ C
S
4 MHz 0.18
mA
8 MHz 0.37
16 MHz 0.76
24 MHz 1.39
48 MHz 2.188
V
DDIOx
= 3.3 V
C
EXT
= 22 pF
C = C
INT
+ C
EXT
+ C
S
4 MHz 0.49
8 MHz 0.94
16 MHz 2.38
24 MHz 3.99
V
DDIOx
= 3.3 V
C
EXT
= 47 pF
C = C
INT
+ C
EXT
+ C
S
C = C
int
4 MHz 0.81
8 MHz 1.7
16 MHz 3.67