STM32L162VC-A datasheet(73/128 Pages) STMICROELECTRONICS

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STM32L162xC/C-A

Electrical characteristics

111

6.3.6

External clock source characteristics

High-speed external user clock generated from an external source

In bypass mode the HSE oscillator is switched off and the input pin is a standard GPIO.The

external clock signal has to respect the I/O characteristics in Section 6.3.12. However, the

recommended clock input waveform is shown in Figure 13.

Table 25. Low-power mode wakeup timings

Symbol

Parameter

Conditions

Typ

Max(1)

1. Guaranteed by characterization, unless otherwise specified

Unit

tWUSLEEP

Wakeup from Sleep mode

fHCLK = 32 MHz

0.4

µs

tWUSLEEP_LP

Wakeup from Low-power sleep

mode, fHCLK = 262 kHz

fHCLK = 262 kHz

Flash enabled

fHCLK = 262 kHz

Flash switched OFF

tWUSTOP

Wakeup from Stop mode,

regulator in Run mode

ULP bit = 1 and FWU bit = 1

fHCLK = fMSI = 4.2 MHz

8.2

Wakeup from Stop mode,

regulator in low-power mode

ULP bit = 1 and FWU bit = 1

fHCLK = fMSI = 4.2 MHz

Voltage range 1 and 2

7.7

8.9

fHCLK = fMSI = 4.2 MHz

Voltage range 3

8.2

13.1

fHCLK = fMSI = 2.1 MHz

10.2

13.4

fHCLK = fMSI = 1.05 MHz

fHCLK = fMSI = 524 kHz

fHCLK = fMSI = 262 kHz

fHCLK = fMSI = 131 kHz

112

123

fHCLK = MSI = 65 kHz

221

236

tWUSTDBY

Wakeup from Standby mode

ULP bit = 1 and FWU bit = 1

fHCLK = MSI = 2.1 MHz

104

Wakeup from Standby mode

FWU bit = 0

fHCLK = MSI = 2.1 MHz

2.6

3.25

Table 26. High-speed external user clock characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fHSE_ext

User external clock source

frequency

CSS is on or

PLL is used

MHz

CSS is off, PLL

not used

MHz

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