Wakeup Time From Low Power Mode; Table 25. Low-Power Mode Wakeup Timings - STMicroelectronics STM32L151CB Manual

STM32L151x6/8/B, STM32L152x6/8/B
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 ambient temperature and V
voltage conditions summarized in
Symbol
t
WUSLEEP
t
WUSLEEP_LP
t
WUSTOP
t
WUSTDBY
1. Based on characterization, not tested in production, unless otherwise specified
Table 13.

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
Wakeup from Stop mode,
regulator in low power
mode
Wakeup from Standby
mode
FWU bit = 1
Wakeup from Standby
mode
FWU bit = 0
DocID17659 Rev 10
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
supply
DD
(1)
Typ Max Unit
0.36 -
32 -
34 -
8.2 -
8.2 9.3
7.8 11.2
µs
10 12
15.5 20
29 35
53 63
105 118
210 237
50 103
2.5 3.2 ms
67/129
103