Application description

AN4102

6/16

Doc ID 023129 Rev 1

Figure 3.

and Halt modes, the LCD is switched off. Once the measurement has been performed, it is

then switched on to display the value of the power consumption.

1.5.2

Bias current record

This operation consists in storing in the memory the value of the bias current inherent to the

operational amplifier A (see Figure 2) of your STM8AL board. The value of the bias current

is taken into account for low-power measurements so as to minimize any measurement

errors.

Press USER1 and

maintain it

pressed

Power supply

STM8AL Board

LD4 ON

Release USER1

button

« ** TEST ** »

displayed on LCD

Measuring

displaying and

checking VDD

Measuring

displaying and

checking Idd RUN

Measuring

displaying and

checking Idd

HALT

Measuring

displaying and

checking Idd LP

without LCD

STM8AL

board is not

powered yet

and JP2 set

to ON

position

« ** TEST OK ** »

displayed on LCD

LD4 set

LD4 OFF

For every step in blue color, if the measurement

is out the specification then the sequence ends

and an error message is displayed on the LCD

panel

Switch to LIN

Demo

START