Renesas SH7781 用户手册

19.   Display Unit (DU) 

Rev.1.00  Jan. 10, 2008  Page 915 of 1658 

REJ09B0261-0100 

 

The color palette 1 registers 000 to 255 (CP1_000R to CP1_255R) are a group of 256 registers 
which set six bits for each of the RGB components of a color, and are used as a color palette 
capable of displaying 256 colors among 260,000 possible colors. Bits 31 to 24 are used as a blend 
ratio. The values are valid for 8 bits/pixel data display.  

For details of color palette operation, refer to section 19.4.8, Color Palettes.  

Values are retained during power-on reset and manual reset. 

R/W:

Internal update:

R/W:

Internal update:

Bit:

Initial value:

Bit:

Initial value:

16

17

18

19

20

21

22

23

24

25

26

27

28

29

31

30

R

R

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

 

 

O

O

O

O

O

O

O

O

O

O

O

O

O

O

0

0

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

CP1_000R to CP1_255R

CP1_000A to CP1_255A

R

R

R/W

R/W

R/W

R/W

R/W

R/W

R

R

R/W

R/W

R/W

R/W

R/W

R/W

 

 

O

O

O

O

O

O

 

 

O

O

O

O

O

O

0

0

—

—

—

—

—

—

0

0

—

—

—

—

—

—

—

—

CP1_000B to CP1_255B

—

—

CP1_000G to CP1_255G

0

1

2

3

4

5

6

7

8

9

10

11

12

13

15

14

 

 

31 to 24 

CP1_000A to 

CP1_255A 

Undefined  R/W 

Yes 

Color Palette 1_000 to 255 Blending Ratio 

To enable this bit, the ABRE bit in DEFR 
should be set to 1. In the initial state, this bit is 
not enabled. 

When the PnBRSL bits in PnALPHAR are 10, 
the value is the alpha value, which is the blend 
ratio. 

23 to 18 

CP1_000R to 

CP1_255R 

Undefined  R/W 

Yes 

Color Palette 1_000 to 255 Red 

Red-color data of color palette 1 should be set.

17, 16 

⎯ All 

0 

R 

⎯ Reserved 

These bits are always read as 0. The write 
value should always be 0. 

15 to 10 

CP1_000G to 

CP1_255G 

Undefined  R/W 

Yes 

Color Palette 1_000 to 255 Green 

Green-color data of color palette 1 should be 
set.