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Liquid Crystal Display Controller (LCDC)
22-34
Freescale Semiconductor
Figure 22-32. Gray-Scale Pixel Generation
22.4.7
Color Generation
The value corresponding to each color pixel on the screen is represented by a 4-, 8-, 12-, 16- or 18-bit code
in the display memory.
For 4- and 8-bit modes the LCDC’s color mapping RAM is used to map the data to a 12-bit and 18-bit
RGB code for passive and active matrix color displays respectively. For 4-bit and 8-bit passive matrix
color displays, the 12-bit RGB code from the mapping RAM is output to the FRC blocks that
independently process the code corresponding to the red, green, and blue components of each pixel to
generate the required shade and intensity.
For 4-bit and 8-bit active matrix display, the 18-bit output from the mapping RAM is output to the panel.
For 12-bit mode for passive matrix color display, the mapping RAM is bypassed and output directly to the
FRC block.
For 12-, 16- and 18-bit active matrix color display, pixel data is simply moved from display memory to the
LCDC output bus.
illustrate passive matrix and active matrix color pixel generation.
1 0
1 1 0 0
7 6 5 4 3 2 1 0
2 bpp Data
4 bpp Data
1 0
1
1
-
-
-
-
-
-
-
-
FRC
1
To Panel
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...