AN3269 datasheet(13/19 Pages) STMICROELECTRONICS

13 / 19 page

AN3269

Software description

Doc ID 17904 Rev 1

13/19

As detailed in the flowchart, after starting the STM8L-DISCOVERY, the initialization of the

peripherals and LCD display is performed and then the application immediately checks

whether the USER push-button is pressed. If pressed, then the application goes to the Bias

current record operation. Otherwise, the Demo mode (IDD measurement) is automatically

selected. If during Demo mode, the user presses the USER key for more than 3 seconds,

then the application enters manufacturing test. To exit manufacturing test, the application

needs to be restarted by pressing the RESET button.

2.3.2

Demo mode (IDD measurement)

When Demo mode is launched, it starts displaying a welcoming message and then, after a

few seconds, the VDD value.

The user then selects one of the IDD measurement functions by pressing successively on

the USER pushbutton (as described in Section 1.5.1).

These functions are mainly divided in 2 steps:

●

Configuring the device according to the selected power mode

●

IDD measurement and display (this part is common for all power modes)

The Demo mode sequence is as follows:

Figure 5.

Demo mode sequence

IDD measurement and display

The following flowchart describes the IDD measurement and display steps:

AN3269 Datasheet(PDF) 13 Page - STMicroelectronics