ST7232A datasheet(116/157 Pages) STMICROELECTRONICS

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ST7232A

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12.4 SUPPLY CURRENT CHARACTERISTICS

The following current consumption specified for the ST7 functional operating modes over temperature

range does not take into account the clock source current consumption. To get the total device consump-

tion, the two current values must be added (except for HALT mode for which the clock is stopped).

12.4.1 CURRENT CONSUMPTION

Notes:

1. Data based on characterization results, tested in production at VDD max. and fCPU max.

2. Measurements are done in the following conditions:

- Progam executed from RAM, CPU running with RAM access. The increase in consumption when executing from Flash

is 50%.

- All I/O pins in input mode with a static value at VDD or VSS (no load)

- All peripherals in reset state.

- Clock input (OSC1) driven by external square wave.

- In SLOW and SLOW WAIT mode, fCPU is based on fOSC divided by 32.

To obtain the total current consumption of the device, add the clock source (Section 12.5.3) and the peripheral power

consumption (Section 12.4.3).

3. All I/O pins in push-pull 0 mode (when applicable) with a static value at VDD or VSS (no load). Data based on charac-

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

4. Data based on characterisation results, not tested in production. All I/O pins in push-pull 0 mode (when applicable) with

a static value at VDD or VSS (no load); clock input (OSC1) driven by external square wave. To obtain the total current

consumption of the device, add the clock source consumption (Section 12.5.3).

Symbol

Parameter

Conditions

Flash Devices

ROM Devices

Unit

Typ

Max 1)

Typ

Max 1)

IDD

Supply current in RUN mode 2)

fOSC=2MHz, fCPU=1MHz

fOSC=4MHz, fCPU=2MHz

fOSC=8MHz, fCPU=4MHz

fOSC=16MHz, fCPU=8MHz

1.4

2.4

4.4

2.3

3.5

5.3

7.0

1.3

2.0

3.6

7.1

2.0

3.0

Supply current in SLOW mode 2)

fOSC=2MHz, fCPU=62.5kHz

fOSC=4MHz, fCPU=125kHz

fOSC=8MHz, fCPU=250kHz

fOSC=16MHz, fCPU=500kHz

0.48

0.53

0.63

0.80

1.1

1.2

1.4

0.6

0.7

0.8

1.1

1.8

2.1

2.4

3.0

Supply current in WAIT mode 2)

fOSC=2MHz, fCPU=1MHz

fOSC=4MHz, fCPU=2MHz

fOSC=8MHz, fCPU=4MHz

fOSC=16MHz, fCPU=8MHz

0.6

0.9

1.3

2.3

1.8

2.2

2.6

3.6

1.5

2.5

4.5

1.3

2.0

3.3

Supply current in SLOW WAIT

mode 2)

fOSC=2MHz, fCPU=62.5kHz

fOSC=4MHz, fCPU=125kHz

fOSC=8MHz, fCPU=250kHz

fOSC=16MHz, fCPU=500kHz

430

470

530

660

950

1000

1050

1200

100

200

350

200

300

600

1200

µA

Supply current in HALT mode 3)

-40°C

≤T

A≤+85°C

µA

-40°C

≤T

A≤+125°C

Supply current in ACTIVE-HALT

mode 4)

fOSC=2MHz

fOSC=4MHz

fOSC=8MHz

fOSC =16MHz

100

180

340

160

200

300

500

170

120

300

µA

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