STLUX datasheet(96/126 Pages) STMICROELECTRONICS

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Electrical characteristics

STLUX

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DocID027870 Rev 1

Low power mode wake-up time

Table 76 shows the wake-up time to resume the normal operating mode from the different

low power state.

12.3.3

External clock sources and timing characteristics

HSE user external clock

Subject to general operating conditions for VDD and TA.

Table 76. Wake-up times

Symbol

Parameter

Conditions

Typ.(1) Max.(1) Unit

tWU(WFI)

Wake-up

time from

wait mode to

run mode(2)

fCPU  fMASTER = 0 to 16 MHz

Ref.(3)

s

fCPU = fMASTER = 16 MHz

0.56

tWU(AH)

Wake-up

time active

halt mode to

run mode(2)

MVR voltage regulator

on(4)

Flash in operating mode(5)

HSI

(after

wake-up)

4(6)

Flash in power- down mode(5)

6(6)

MVR voltage regulator

off(4)

Flash in operating mode(5)

47(6)

Flash in power- down mode(5)

49(6)

tWU(H)

Wake-up

time from halt

mode to run

mode(2)

Flash in operating mode(5)

Flash in power-down mode(5)

1. Data based on characterization results, not tested in production.

2. Measured from the interrupt event to interrupt vector fetch.

3. tWU(WFI) = 2 x 1/fMASTER + 7 x 1/fCPU.

4. Configured by the REGAH bit in the CLK_ICKR register.

5. Configured by the AHALT bit in the FLASH_CR1 register.

6. Plus 1 LSI clock depending on synchronization (fLSI = 153.6 kHz).

Table 77. HSE user external clock characteristics

Symbol

Parameter

Conditions

Min.

Max.

Unit

fHSE_ext

User external clock source frequency

-40 °C

 TA  105 °C

16(1)

MHz

VHSEH(2)

HSEOSCIN input pin high level voltage

0.7 x VDD

VDD

VHSEL(2)

HSEOSCIN input pin low level voltage

VSS

0.3 x VDD

ILEAKHSE(2)

HSEOSCIN input pin leakage

VSS  VIN  VDD

-1

µA

1. In case fHSE is configured as a direct clock for the SMED logics the maximum frequency can be 24 MHz.

2. Data based on characterization results, not tested in production.

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