ST7MC1 datasheet(251/308 Pages) STMICROELECTRONICS

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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 RUN and SLOW Modes (Flash devices)

Figure 131. Typical IDD in RUN vs. fCPU

Figure 132. Typical IDD in SLOW vs. fCPU

Notes:

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

2. Measurements are done in the following conditions:

- Program 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.

- LVD disabled.

- 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.

Symbol

Parameter

Conditions

Typ

Max 1)

Unit

IDD

Supply current in RUN mode 2)

(see Figure 131)

fOSC=16MHz, fCPU=8MHz

Supply current in SLOW mode 2)

(see Figure 132)

fOSC=16MHz, fCPU=500kHz

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

0123

456

Fcpu Mhz

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Fcpu Mhz

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