HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 967

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

26.4.3
(1)
This LCDC has a color palette which outputs 24 bits of data per entry and is able to
simultaneously hold 256 entries. The color palette thus allows the simultaneous display of 256
colors chosen from among 16-M colors.
The procedure below may be used to set up color palettes at any time.
1. The PALEN bit in the LDPALCR is 0 (initial value); normal display operation
2. Access LDPALCR and set the PALEN bit to 1; enter color-palette setting mode after three
3. Access LDPALCR and confirm that the PALS bit is 1.
4. Access LDPR00 to LDPRFF and write the required values to the PALD00 to PALDFF bits.
5. Access LDPALCR and clear the PALEN bit to 0; return to normal display mode after a cycle
A 0 is output on the LCDC display data output (LCD_DATA) while the PALS bit in LDPALCR is
set to 1.
PALDnn color and gradation data should be set as above.
For a color display, PALDnn[23:16], PALDnn[15:8], and PALDnn[7:0] respectively hold the R,
G, and B data. Although the bits PALDnn[18:16], PALDnn[9:8], and PALDnn[2:0] exist, no
memory is associated with these bits. PALDnn[18:16], PALDnn[9:8], and PALDnn[2:0] are thus
not available for storing palette data. The numbers of valid bits are thus R: 5, G: 6, and B: 5. A 24-
bit (R: 8 bits, G: 8 bits, and B: 8 bits) data should, however, be written to the palette-data registers.
When the values for PALDnn[23:19], PALDnn[15:10], or PALDnn[7:3] are not 0, 1 or 0 should
be written to PALDnn[18:16], PALDnn[9:8], or PALDnn[2:0], respectively. When the values of
PALDnn[23:19], PALDnn[15:10], or PALDnn[7:3] are 0, 0s should be written to
PALDnn[18:16], PALDnn[9:8], or PALDnn[2:0], respectively. Then 24 bits are extended.
Color
Monochrome
cycles of peripheral clock.
of peripheral clock.
Color Palette Register
Color Palette Specification
31
Figure 26.3
R7
23
R6
R5
R4
Color-Palette Data Format
R3
R2
R1
R0
G7
15
G6
Rev. 3.00 Jan. 18, 2008 Page 905 of 1458
G5
G4
G3
Section 26
G2
G1
G0
M7
B7
7
LCD Controller (LCDC)
M6
B6
M5
B5
REJ09B0033-0300
M4
B4
M3
B3
M2
B2
M1
B1
M0
B0
0