AK8825 Datasheet, PDF (37/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(3) RGB 8bit Data Input Format (RGB5:6:5)
[AK8825]
In case of to encode NTSC/PAL composite Video signal or YPbPr component Video signal from RGB data, this mode is used.
Clock rate to CLKIN pin is 27MHz.
DATA7-DATA0 pins are used as Data Input pins. Input data format is RG[7:0] / GB[7:0] shown as following table.
D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
-
-
-
-
-
-
-
-
-
-
R4 R3 R2 R1 R0 G5 G4 G3
G2 G1 G0 B4 B3 B2 B1 B0
D17 - D0 corresponds to DATA17 - DATA0 pins
RG Data = [ R4, R3, R2, R1, R0, G5, G4, G3 ]
GB Data = [ G2, G1, G0, B4, B3, B2, B1, B0 ]
The Register setting is defined as following table.
[I/O Data Fromat Register] Setting
INPFMT[1:0]-bit
DTFMT-bit
00
1
Note
8bit RGB Data Input
Output signal is set CONVMOD[1:0]-bit of I/O Data Format Register (R/W) [Sub Address 0x0B] and HD Mode Register
(R/W) [Sub Address 0x00] or SD Block Control Register (R/W) [Sub Address 0x11]
CLKIN
(27MHz)
DATA[7:0] RG0 GB0 RG1 GB1 … … RGn GBn RGn+1 GBn+1 _{･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･}
Fig. 28
Rev-E-00
37
2008/03