ST72C171 datasheet(118/152 Pages) STMICROELECTRONICS

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ST72C171

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SUPPLY CURRENT CHARACTERISTICS (Cont’d)

9.4.3 HALT Mode

9.4.4 Supply and Clock Managers

The previous current consumption specified for

the ST7 functional operating modes over tempera-

ture range does not take into account the clock

source current consumption. To get the total de-

vice consumption, the two current values must be

added (except for HALT mode).

9.4.5 On-Chip Peripherals

Notes:

1. Typical data are based on TA=25°C.

2. All I/O pins in input mode with a static value at VDD or VSS (no load), CSS and LVD disabled. Data based on charac-

terization results, tested in production at VDD max. and fCPU max.

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

4. Data based on characterization results done with the external components specified in Section 9.5.3 and Section 9.5.4,

not tested in production.

5. As the oscillator is based on a current source, the consumption does not depend on the voltage.

6. Data based on a differential IDD measurement between reset configuration (timer counter running at fCPU/4) and timer

counter stopped (selecting external clock capability). Data valid for one timer.

7. Data based on a differential IDD measurement between reset configuration and a permanent SPI master communica-

tion (data sent equal to 55h).

8. Data based on a differential IDD measurement between reset configuration and I2C peripheral enabled (PE bit set).

9. Data based on a differential IDD measurement between reset configuration and continuous A/D conversions.

Symbol

Parameter

Conditions

Typ 1)

Max

Unit

IDD

Supply current in HALT mode 2)

VDD=5.5V

-40°C

≤T

A≤+85°C

µA

VDD=3.6V

-40°C

≤T

A≤+85°C

Symbol

Parameter

Conditions

Typ 1)

Max 3)

Unit

IDD(CK)

Supply current of internal RC oscillator

500

750

µA

Supply current of external RC oscillator 4)

525

750

Supply current of resonator oscillator 4) & 5)

LP: Low power oscillator

MP: Medium power oscillator

MS: Medium speed oscillator

HS: High speed oscillator

200

300

450

700

400

550

750

1000

Clock security system supply current

150

350

IDD(LVD)

LVD supply current

HALT mode

100

150

Symbol

Parameter

Conditions

Typ

Unit

IDD(TIM)

16-bit Timer supply current 6)

fCPU=8MHz

VDD=3.4V

µA

VDD=5.0V

150

IDD(SPI)

SPI supply current 7)

fCPU=8MHz

VDD=3.4V

250

VDD=5.0V

350

IDD(I2C)

I2C supply current 8)

fCPU=8MHz

VDD=3.4V

250

VDD=5.0V

350

IDD(ADC)

ADC supply current when converting 9)

fADC=4MHz

VDD=3.4V

800

VDD=5.0V

1100

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