Laptop User Manual

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