mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 1026

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

LCD Controller
18.4.7.4 PASSIVE FOUR AND EIGHT BITS PER PIXEL COLOR MODE. This mode
operates the same way for 4- or 8-bits per pixel and the color RAM is loaded similarly. You
provide a 4- or 8- bit data word that the DMA controller retrieves from display memory and
that value is indexed into the color RAM as shown below. For 4-bits per pixel mode, you can
choose one of 16 colors from the 4,096 possible colors. For 8-bits per pixel mode, you can
choose one of 256 colors from the 4,096 possible colors. See Figure 18-9 for more
information.
Bits 0–3—Reserved
These bits are reserved and must be set to 0.
R—Red Level
This field is a 4-bit code that represents the red color level. The frame rate control dictates
when this color pixel is on or off.
G—Green Level
This field is a 4-bit code that represents the green color level. The frame rate control dictates
when this color pixel is on or off.
B—Blue Level
This field is a 4-bit code that represents the blue color level. The frame rate control dictates
when this color pixel is on or off.
NOTE: — = Undefined.
RESET
FIELD
ADDR
R/W
BIT
0
RESERVED
1
R/W
—
2
(IMMR &
Freescale Semiconductor, Inc.
For More Information On This Product,
3
0x
FFFF0000) +
MPC823 REFERENCE MANUAL
4
Go to: www.freescale.com
5
R/W
(DPR) 0xE00—0xE1F (4-BIT) OR 0xE00—0xFFF (8-BIT)
—
R
6
7
8
9
R/W
—
G
10
11
12
13
R/W
—
B
MOTOROLA
14
15