Samsung S3C2440A User Manual

Page 410

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LCD CONTROLLER

S3C2440A RISC MICROPROCESSOR

15-42

Example 1:

160 x 160, 4-level gray, 80 frame/sec, 4-bit single scan display, HCLK frequency is 60 MHz WLH = 1, WDLY = 1.

Data transmission rate = 160 x 160 x 80 x 1/4 = 512 kHz
CLKVAL = 58,

VCLK = 517KHz

HOZVAL = 39,

LINEVAL = 159

LINEBLANK =10

LCDBASEL = LCDBASEU + 3200

Note

The higher the system load is, the lower the CPU performance.

Example 2 (Virtual screen register):

4 -level gray, Virtual screen size = 1024 x 1024, LCD size = 320 x 240, LCDBASEU = 0x64, 4-bit dual scan.

1 halfword = 8 pixels (4-level gray),
Virtual screen 1 line = 128 halfword = 1024 pixels,
LCD 1 line = 320 pixels = 40 halfword,
OFFSIZE = 128 - 40 = 88 = 0x58,
PAGEWIDTH = 40 = 0x28

LCDBASEL = LCDBASEU + (PAGEWIDTH + OFFSIZE) x (LINEVAL +1) = 100 + (40 +88) x 120 = 0x3C64