KS57C2308/P2308/C2316/P2316

LCD CONTROLLER/DRIVER

 

 

12 LCD CONTROLLER/DRIVER

OVERVIEW

The KS57C2308/C2316 microcontroller can directly drive an up-to-128-dot (32 segments x 4 commons) LCD panel. Its LCD block has the following components:

LCD controller/driver

Display RAM for storing display data

32 segment output pins (SEG0–SEG31)

4 common output pins (COM0–COM3)

Four LCD operating power supply pins (VLC0–VLC2)

The frame frequency, duty and bias, and the segment pins used for display output, are determined by bit settings in the LCD mode register, LMOD.

The LCD control register, LCON, is used to turn the LCD display on and off, to switch current to the dividing resistors for the LCD display, and to output LCD clock (LCDCK) and synchronizing signal (LCDSY) for LCD display expansion. Data written to the LCD display RAM can be transferred to the segment signal pins automatically without program control.

When a subsystem clock is selected as the LCD clock source, the LCD display is enabled even during main clock stop and idle modes.

DATA BUS

8

LCD

CONTROLLER /

DRIVER

VLC0VLC2

3

COM0–COM3

4

SEG0–SEG23 24

SEG24–SEG31/

8 P8.0–P8.7

Figure 12-1. LCD Function Diagram

12-1

Page 249
Image 249
Samsung KS57C2308 manual Lcd Controller/Driver, Data BUS LCD Controller Driver