Freescale Semiconductor MCF52277 Reference Manual page 461

The graphics window can only be enabled while the clock to the LCD
controller is disabled (MISCCR[LCDCHEN] is cleared). See
"Chip Configuration Module (CCM),"
window can be disabled at any time.
Address: 0xFC0A_C064 (LCD_GWCR)
31 30 29 28 27 26 25 24
R
GWAV
W
Reset 0 0 0 0 0 0 0 0
Figure 21-25. LCD Graphic Window Control Register (LCD_GWCR)
Field
31–24 Graphic window alpha value. Defines the alpha value of graphic window used for alpha blending between the graphic
GWAV window and the background plane
0 Graphic window totally transparent, not displayed on the LCD screen.
1 Graphic window totally opaque, completely visible on the LCD screen.
23 Graphic window color keying enable. Enable or disable graphic window color keying.
GWCKE 0 Disable color keying of graphic window.
1 Enable color keying of graphic window.
22 Graphic window enable. Enable or disable graphic window displayed on screen.
GWE 0 Disable graphic window on screen.
1 Enable graphic window on screen.
21 Graphic window reverse vertical scan. Selects the graphic window vertical scan direction as normal or reverse
GW_RVS (graphic window image flips along the x-axis). The LGWSAR must be changed accordingly.
0 Vertical scan in normal direction.
1 Vertical scan in reverse direction.
20–18 Reserved, must be cleared.
17–12 Graphic window color keying red component. Defines the red component of graphic window color keying.
GWCKR 0x00 No red
...
0x3F Full red
11–6 Graphic window color keying green component. Defines the green component of graphic window color keying.
GWCKG 0x00 No green
...
0x3F Full green
5–0 Graphic window color keying blue component. Defines the blue component of graphic window color keying.
GWCKB 0x00 No blue
...
0x3F Full blue
Freescale Semiconductor
NOTE
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
GW_
0 0 0
GW
RVS
GWE
CKE
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Table 21-26. LCD_GWCR Field Descriptions
Description
MCF52277 Reference Manual, Rev. 1
Liquid Crystal Display Controller (LCDC)
for details on this bit. The graphics
GWCKR GWCKG
Chapter 9,
Access: User read/write
8 7 6 5 4 3 2
GWCKB
1 0
21-25