Wakeup Time From Low-Power Mode; Table 25. Low-Power Mode Wakeup Timings - STMicroelectronics STM32L151RE Manual

STM32L151xE STM32L152xE
3. Data based on a differential I
consumption not included).
4. Data based on a differential I
V /2. DAC is in buffered mode, output is left floating.
DD
5. Including supply current of internal reference voltage.
6 In Low-power sleep and run mode, the Flash memory must always be in power-down mode.
6.3.5

Wakeup time from low-power mode

The wakeup times given in the following table are measured with the MSI RC oscillator. The
clock source used to wake up the device depends on the current operating mode:
•
Sleep mode: the clock source is the clock that was set before entering Sleep mode
•
Stop mode: the clock source is the MSI oscillator in the range configured before
entering Stop mode
•
Standby mode: the clock source is the MSI oscillator running at 2.1 MHz
All timings are derived from tests performed under the conditions summarized in
Symbol
t
WUSLEEP
t
WUSLEEP_LP
t
WUSTOP
t
WUSTDBY
1. Guaranteed by characterization, unless otherwise specified
measurement between ADC in reset configuration and continuous ADC conversion (HSI
DD
measurement between DAC in reset configuration and continuous DAC conversion of
DD

Table 25. Low-power mode wakeup timings

Parameter
Wakeup from Sleep mode
Wakeup from Low-power sleep
mode, f = 262 kHz
HCLK
Wakeup from Stop mode,
regulator in Run mode
ULP bit = 1 and FWU bit = 1
Wakeup from Stop mode,
regulator in low-power mode
ULP bit = 1 and FWU bit = 1
Wakeup from Standby mode
ULP bit = 1 and FWU bit = 1
Wakeup from Standby mode
FWU bit = 0
DocID025433 Rev 8
Electrical characteristics
Conditions
f = 32 MHz
HCLK
f = 262 kHz
HCLK
Flash enabled
f = 262 kHz
HCLK
Flash switched OFF
f = f = 4.2 MHz
HCLK MSI
f = f = 4.2 MHz
HCLK MSI
Voltage range 1 and 2
f = f = 4.2 MHz
HCLK MSI
Voltage range 3
f = f = 2.1 MHz
HCLK MSI
f = f = 1.05 MHz
HCLK MSI
f = f = 524 kHz
HCLK MSI
f = f = 262 kHz
HCLK MSI
f = f = 131 kHz
HCLK MSI
f = MSI = 65 kHz
HCLK
f = MSI = 2.1 MHz
HCLK
f = MSI = 2.1 MHz
HCLK
Table 13.
(1)
Typ Max Unit
0.4 -
46 -
46 -
8.2 -
7.7 8.9
µs
8.2 13.1
10.2 13.4
16 20
31 37
57 66
112 123
221 236
58 104
2.6 3.25 ms
75/134
113