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318
CHAPTER 22
LCD Drivers
Display data RAM organization
SEG
0
Page 0
COM 0
COM 1
COM 2
SEG
2
...
SEG
n
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
...
COM 3
SEG
1
DB0
DB1
Page n
DB2
DB3
DB4
DB5
COM n
DB6
DB7
The picture above shows the relation between the display memory and the SEG and
COM lines of the LCD.
Additional RAM requirements of the driver
This LCD driver may be used with or without a display data cache, containing a complete copy of the contents of the LCD data RAM. If a cache is not used, there are no
additional RAM requirements.
It is recommended to use this driver with a data cache for faster LCD-access. The
amount of memory used by the cache may be calculated as follows:
Size of RAM (in bytes) = (LCD_YSIZE + 7) / 8 * LCD_XSIZE
Additional driver functions
None.
User's & reference manual for µC/GUI
© 2002 Micrium Technologies Corporation