LCD CONTROLLER/DRIVER

KS57C2308/P2308/C2316/P2316

 

 

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

Table 12-6. Common Signal Pins Used Per Duty Cycle

Display Mode

COM0 Pin

COM1 Pin

COM2 Pin

COM3 Pin

 

 

 

 

 

Static

Selected

N/C

N/C

N/C

 

 

 

 

 

1/2 duty

Selected

Selected

N/C

N/C

 

 

 

 

 

1/3 duty

Selected

Selected

Selected

N/C

 

 

 

 

 

1/4 duty

Selected

Selected

Selected

Selected

 

 

 

 

 

NOTE: “NC” means that no connection is required.

COM0

Tf = T

T: LCDCK

Tf: Frame frequency

VLC0

VLCD

VSS

Figure 12-5. LCD Common Signal Waveform (Static)

12-8

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Samsung KS57C2308 manual Common COM Signals, LCD Common Signal Waveform Static