AN3269 Datasheet, PDF (8/19 Pages) STMicroelectronics – This application note introduces some

Application description
Figure 3. Function Change state diagram
34!24
AN3269
(ALT
MODE
)$$
6$$
VALUE
5SER
PUSH BUTTON
PRESSED
2UN
MODE
)$$
,OWPOWER
WITHOUT,#$
)$$
,OWPOWER
WITH,#$
)$$
AI
BAR0 to BAR3 are used by the application to indicate ongoing measurements as shown in
Table 1.
In order to save power during the I_DD measurement in Low power run without LCD and Halt
modes, the LCD is switched off. Once the measurement performed it is then switched on to
display the power consumption value.
Table 1. Bars and LCD display linked to functions
Function
Bars
LCD blinking
VDD
-
Run mode
-
Low power run with LCD
-
Low power run without LCD
X
Halt mode
X
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Doc ID 17904 Rev 1