Samsung KS57C2308 Manual page 256

LCD CONTROLLER/DRIVER
COMMON (COM) SIGNALS
The common signal output pin selection (COM pin selection) varies according to the selected duty cycle. You
must therefore be open any unused COM pins according to this guideline:
— In static mode, be open the COM1, COM2, and COM3 pins
— In 1/2 duty mode, be open the COM2 and COM3 pin
— In 1/3 duty mode, be open the COM3 pin
Display Mode
Static
1/2 duty
1/3 duty
1/4 duty
NOTE: "NC" means that no connection is required.
12-8
Table 12-6. Common Signal Pins Used Per Duty Cycle
COM0 Pin
Selected
Selected
Selected
Selected
COM0
T = T
f
T: LCDCK
T : Frame frequency
f
Figure 12-5. LCD Common Signal Waveform (Static)
COM1 Pin COM2 Pin
N/C
Selected
Selected
Selected
KS57C2308/P2308/C2316/P2316
COM3 Pin
N/C
N/C
Selected
Selected Selected
V
LC0
V
LCD
V
SS
N/C
N/C
N/C