Samsung C8278X ユーザーズマニュアル

The common signal output pin selection (COM pin selection) varies according to the selected duty cycle. 

•  In 1/4 duty mode, COM0-COM3 pins are selected 
•  In 1/3 duty mode, COM0-COM2 pins are selected 
•  In 1/2 duty mode, COM0-COM1 pins are selected 

The 32 LCD segment signal pins are connected to corresponding display RAM locations at page 2. Bits of the 
display RAM are synchronized with the common signal output pins. 

When the bit value of a display RAM location is "1", a select signal is sent to the corresponding segment pin. 
When the display bit is "0", a 'no-select' signal to the corresponding segment pin. 

1 Frame

Select

Non-Select

FR

COM

SEG

COM-SEG

V

LC0

V

SS

V

LC0

V

SS

V

LC0

V

SS

-V

LC0