Freescale Semiconductor MCF52277 Reference Manual page 477

3. LCD_VSYNC causes the panel to start a new frame. It always encompasses at least one
LCD_HSYNC pulse.
4. LCD_OE functions as an output enable signal to the CRT. This output enable signal is similar to
the blanking output in a CRT and enables the data to be shifted onto the display. When disabled,
the data is invalid and the trace is off.
In 4- and 8-bit mode, the LCD_D[17:12] bits define red, the LCD_D[11:6] bits define green, and the
LCD_D[5:0] bits define blue. In 12-bit mode, the LCD_D[17:14] bits define red, the LCD_D[11:8] bits
define green, and the LCD_D[5:2] bits define blue. In 16-bit mode, the LCD_D[17:13] bits define red, the
LCD_D[11:6] bits define green, and the LCD_D[5:1] bits define blue.
The actual TFT color channel assignments are shown in
17 16
R5 R4
4 bpp
R5 R4
8 bpp
R3 R2
12 bpp
R4 R3
16 bpp
R5 R4
18 bpp
Freescale Semiconductor
Table 21-34. TFT Color Channel Assignments
15 14 13 12 11
R3 R2 R1 R0 G5
R3 R2 R1 R0 G5
R1 R0 – – G3
R2 R1 R0 – G5
R3 R2 R1 R0 G5
MCF52277 Reference Manual, Rev. 1
Table 21-34. The unused bits are fixed at 0.
LCD_D[17:0]
10 9 8 7 6
G4 G3 G2 G1 G0
G4 G3 G2 G1 G0
G2 G1 G0 – –
G4 G3 G2 G1 G0
G4 G3 G2 G1 G0
Liquid Crystal Display Controller (LCDC)
5 4 3 2 1
B5 B4 B3 B2 B1
B5 B4 B3 B2 B1
B3 B2 B1 B0 –
B4 B3 B2 B1 B0
B5 B4 B3 B2 B1
0
B0
B0
–
–
B0
21-41