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S3C8248/C8245/P8245/C8247/C8249/P8249
14
OVERVIEW
The S3C8248/C8245/C8247/C8249 micro-controller can directly drive an up-to-16-digit (32-segment) LCD panel.
The LCD module has the following components:
— LCD controller/driver
— Display RAM (00H–0FH) for storing display data in page 4
— 32 segment output pins (SEG0–SEG31)
— Four common output pins (COM0–COM3)
— Three LCD operating power supply pins (V
— LCD bias by voltage booster
— LCD bias by voltage dividing resistors
Bit settings in the LCD mode register, LMOD, determine the LCD frame frequency, duty and bias, and the
segment pins used for display output. When a subsystem clock is selected as the LCD clock source, the LCD
display is enabled even during stop and idle modes.
The LCD control register LCON turns the LCD display on and off and switches current to the charge-pump
circuits for the display. LCD data stored in the display RAM locations are transferred to the segment signal pins
automatically without program control.
LCD CONTROLLER/DRIVER
8
Figure 14-1. LCD Function Diagram
V
)
LC0–
LC2
2
LCD
3
Controller/
Driver
4
32
LCD CONTROLLER/DRIVER
CA-CB
V
-V
LC0
LC2
COM0-COM3
SEG0-SEG31
14-1
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