ST72311R datasheet(135/164 Pages) STMICROELECTRONICS

135 / 164 page

ST72311R, ST72511R, ST72512R, ST72532R

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12.4 SUPPLY CURRENT CHARACTERISTICS

The following 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 for which the clock

is stopped).

12.4.1 RUN and SLOW Modes

Figure 69. Typical IDD in RUN vs. fCPU

Figure 70. Typical IDD in SLOW vs. fCPU

Notes:

1. Typical data are based on TA=25°C, VDD=5V (4.5V≤VDD≤5.5V range) and VDD=3.3V (3V≤VDD≤3.6V range).

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

3. CPU running with memory access, all I/O pins in input mode with a static value at VDD or VSS (no load), all peripherals

switched off; clock input (OSC1) driven by external square wave, LVD disabled.

4. SLOW mode selected with fCPU based on fOSC divided by 32. All I/O pins in input mode with a static value at VDD or

VSS (no load), all peripherals switched off; clock input (OSC1) driven by external square wave, LVD disabled.

Symbol

Parameter

Conditions

Max

Unit

∆I

DD(

∆Ta)

Supply current variation vs. temperature

Constant VDD and fCPU

Symbol

Parameter

Conditions

Typ 1)

Max 2)

Unit

IDD

Supply current in RUN mode 3)

(see Figure 69)

fOSC=1MHz, fCPU=500kHz

fOSC=4MHz, fCPU=2MHz

fOSC=16MHz, fCPU=8MHz

2.5

6.5

14.5

Supply current in SLOW mode 4)

(see Figure 70)

fOSC=1MHz, fCPU=31.25kHz

fOSC=4MHz, fCPU=125kHz

fOSC=16MHz, fCPU=500kHz

0.3

0.8

1.8

0.5

2.0

3.0

Supply current in RUN mode 3)

(see Figure 69)

fOSC=1MHz, fCPU=500kHz

fOSC=4MHz, fCPU=2MHz

fOSC=16MHz, fCPU=8MHz

1.6

3.6

2.4

5.4

Supply current in SLOW mode 4)

(see Figure 70)

fOSC=1MHz, fCPU=31.25kHz

fOSC=4MHz, fCPU=125kHz

fOSC=16MHz, fCPU=500kHz

0.15

0.45

0.3

0.9

1.5

3.5

4.5

5.5

VDD [V]

IDD [mA]

8MHz

4MHz

2MHz

500kHz

3.5

4.5

5.5

VDD [V]

0.5

1.5

2.5

IDD [mA]

500kHz

125kHz

31.25kHz

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