42.6.1.9 Contrast Adjustment

The contrast of the LCD is determined by the value of VLCD voltage. The higher the VLCD voltage, the higher is the contrast. The software contrast adjustment is only possible in internal supply mode.

In internal supply mode, VLCD is in the range of 2.5V to 3.5V. VLCD can be adjusted in 16 steps of 60mV by writing a value to the Contrast bits in the Control B register (CTRLB.CTST), see also the according Electrical Characteristics section.

The contrast value can be written at any time, even if SLCD is enabled and running.