What is setup for minimal current for LCD on STM32L073

[MŁask.1]

I have LCD connected to Nucleo with STM32L073. I have configured the clocks and low power mode so with EVERYTHING turned off I get 1uA of current.

Now using cube ide I have added configuration for LCD:

  hlcd.Instance = LCD;
  hlcd.Init.Prescaler = LCD_PRESCALER_1;
  hlcd.Init.Divider = LCD_DIVIDER_31;
  hlcd.Init.Duty = LCD_DUTY_1_4;
  hlcd.Init.Bias = LCD_BIAS_1_3;
  hlcd.Init.VoltageSource = LCD_VOLTAGESOURCE_INTERNAL;
  hlcd.Init.Contrast = LCD_CONTRASTLEVEL_5;
  hlcd.Init.DeadTime = LCD_DEADTIME_0;
  hlcd.Init.PulseOnDuration = LCD_PULSEONDURATION_4;
  hlcd.Init.HighDrive = LCD_HIGHDRIVE_0;
  hlcd.Init.BlinkMode = LCD_BLINKMODE_OFF;
  hlcd.Init.BlinkFrequency = LCD_BLINKFREQUENCY_DIV8;
  hlcd.Init.MuxSegment = LCD_MUXSEGMENT_DISABLE;

And after that I get 15 uA of current. Datasheet on page 86 says that I should have 2.6uA of additional current for LCD driver.

How to initialize LCD display to achive what is in documentation?

[Walid ZRELLI]

Hello @Maciej �?aski​ ,

You can refer to the following example provided under the L0 Firmware Package:

• Path: Projects\STM32L073Z-EVAL\Examples\LCD\LCD_Blink_Frequency

I hope this helps.

BeST Regards,

Walid

[Mvill.17]

Before entering the STOP you've to deinit the LCD. In the function which deinit the low level skip the function that disable the LCD and reconfig the pins as analog.

I did this and achieved exacly 2,6uA

Bye