STM8AF52AATAY datasheet(64/114 Pages) STMICROELECTRONICS

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Electrical characteristics

STM8AF52/62xx, STM8AF51/61xx

64/114

DocID14395 Rev 10

Current consumption for on-chip peripherals

Table 29. Total current consumption in Halt and Active-halt modes. General conditions for VDD

applied. TA = −40 °C to 55 °C unless otherwise stated

Symbol

Parameter

Conditions

Typ

Max

Unit

Main

voltage

regulator

(MVR)(1)

Flash

mode(2)

Clock source and

temperature condition

IDD(H)

Supply current in

Halt mode

Off

Power-

down

Clocks stopped

35(3)

μA

Clocks stopped,

TA = 25 °C

525

IDD(AH)

Supply current in

Active-halt mode

with regulator on

Power-

down

External clock 16 MHz

fMASTER = 125 kHz

770

900(3)

LSI clock 128 kHz

150

230(3)

Supply current in

Active-halt mode

with regulator off

Off

Power-

down

LSI clock 128 kHz

42(3)

LSI clock 128 kHz,

TA = 25 °C

tWU(AH)

Wakeup time from

Active-halt mode

with regulator on

Operating

mode

TA =−40 to 150 °C

30(3)

μs

Wakeup time from

Active-halt mode

with regulator off

Off

80(3)

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

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

3. Data based on characterization results. Not tested in production.

Table 30. Oscillator current consumption

Symbol

Parameter

Conditions

Typ

Max(1)

Unit

IDD(OSC)

HSE oscillator current

consumption(2)

Quartz or

ceramic

resonator,

CL = 33 pF

VDD = 5 V

fOSC = 24 MHz

2.0(3)

fOSC = 16 MHz

0.6

—

fOSC = 8 MHz

0.57

—

IDD(OSC)

HSE oscillator current

consumption(2)

Quartz or

ceramic

resonator,

CL = 33 pF

VDD = 3.3 V

fOSC = 24 MHz

0.5

1.0(3)

fOSC = 16 MHz

0.25

—

fOSC = 8 MHz

0.18

—

1. During startup, the oscillator current consumption may reach 6 mA.

2. The supply current of the oscillator can be further optimized by selecting a high quality resonator with small Rm value. Refer

to crystal manufacturer for more details

3. Informative data.

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