
LH77790B User’s Guide
Table of Contents
ix
LCD Panel Signals Description................................................................................10-3
VD[7:0] .................................................................................................................10-3
CP2 ......................................................................................................................10-4
CP1 ......................................................................................................................10-4
S...........................................................................................................................10-4
MCLK ...................................................................................................................10-4
LCDCNTL.............................................................................................................10-5
Register MAP...........................................................................................................10-5
Description of Registers...........................................................................................10-6
Mode Register (LCD_MODE)...............................................................................10-6
Bit 7 – DISP......................................................................................................10-6
Bit 6 – REV.......................................................................................................10-6
Bit 5 – SCAN ....................................................................................................10-6
Bit 4 – OR.........................................................................................................10-7
Bit 3 – GRAY....................................................................................................10-7
Bit 2 - XSIZE.....................................................................................................10-7
Bit 1 - LCDC .....................................................................................................10-8
Bit 0 – LCDA.....................................................................................................10-8
LCD_MODE Register Summary...........................................................................10-9
Line Display Byte Count Register (LCD_BC).....................................................10-10
Example – 320 pixel wide display ..................................................................10-11
Example - 24 pixel wide display .....................................................................10-11
Line Pulse Width Register (LCD_CP1W)...........................................................10-12
Duty Cycle Registers (LCD_DUTY) ...................................................................10-13
Examples........................................................................................................10-14
Screen #1 Frame Buffer Start Address Registers (LCD_SADR1[31:0]) ............10-15
Screen #2 Frame Buffer Start Address Registers (LCD_SADR2) .....................10-16
Screen #1 Vertical Line Count Registers (LCD_VLC1)......................................10-17
Virtual Display Delta Register (LCD_VDLT).......................................................10-18
Example 1 ......................................................................................................10-19
Example 2 ......................................................................................................10-20
Gray Shade Registers (LCD_GRAY1, LCD_GRAY2)........................................10-20
Example 1 ......................................................................................................10-22
Clock Frequency Divider (LCD_CLKDIV)...........................................................10-23
Example 2 ......................................................................................................10-23
MCLK Width (LCD_MCLKW) .............................................................................10-24
LCD Bit Control (LCD_BITCTL) .........................................................................10-25
Example .........................................................................................................10-25
Shift Operations on the Displayed Data .............................................................10-27
Color Support.........................................................................................................10-28
Basic Timing...........................................................................................................10-28
Timing Equations................................................................................................10-29
Frame Rate Calculations........................................................................................10-32