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(38D5) What is the state of COM when MCU enters STOP mode while LCD operates?

Latest Updated:01/09/2009

Question:

(LCD)  What is the state of the COM pins when the MCU enters STOP mode while the LCD module is in an operating state? [2009/01/09]

Answer:

When the MCU enters STOP mode, the LCD enable bit (bit 4 of the LCD mode register 1 (0x13h address)) is forcibly set to 0.
At the same time, when the VL3 connection bit (bit 1 of the LCD mode register 2 (0x14h address)) = 0, both SEG pins and COM pins output VCC level.
When the VL3 connection bit = 1, both SEG pins and COM pins output VL3 level. (#107243)
Suitable Products
38D5