AK8826 Datasheet, PDF (34/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(4) RGB 16bit Data Input Format (RGB 5:6:5)
[AK8826VN]
In case of encoding NTSC/PAL / 525i/625i , 525p/625p component signal, Clock rate to CLKIN pin 27MHz..
Using as High Speed DAC mode, the maximum conversion rate is 54MHz.
DATA15 - DATA0 pins are used as Data Input pins.
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
The Register setting is defined as following table.
[I/O Data Fromat Register] Setting
INPFMT[1:0]-bit
DTFMT-bit
01
1
Note
16bit RGB 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]
(4-1) 525i / 625i data input case
CLKIN
(27MHz)
Data[4:0]
B₀ B₀ B₁ B₁ B₂ B₂ ŋŋŋ ŋŋŋ B_n B_n B_n+1 B_n+1 B_n+2 B_n+2 ŋŋŋ ŋŋŋ ŋŋŋ
Data[10:5]
G0 G₀ G₁ G₁ G₂ G_{2 ŋŋŋ ŋŋŋ} G_n G_n G_n+1 G_n+1 G_n+2 G_{n+2 ŋŋŋ ŋŋŋ ŋŋŋ}
Data[15:11]
R0 R₀ R₁ R₁ R₂ R_{2 ŋŋŋ ŋŋŋ} R_n R_n R_n+1 R_n+1 R_n+2 R_{n+2 ŋŋŋ ŋŋŋ ŋŋŋ}
Fig. 28
(4-2) 525P / 625P data input case
CLKIN
(27MHz)
Data[4:0]
B₀ B₁ B₂ B₃ ŋŋŋ ŋŋŋ ŋŋŋ ŋŋŋ B_n B_n+1 B_n+2 B_n+3 B_n+4 B_n+5 ŋŋŋ ŋŋŋ ŋŋŋ
Data[10:5]
G0 G₁ G₂ G_{3 ŋŋŋ ŋŋŋ ŋŋŋ ŋŋŋ} G_n G_n+1 G_n+2 G_n+3 G_n+4 G_{n+5 ŋŋŋ ŋŋŋ ŋŋŋ}
Data[15:11]
R0 R₀ R₁ R_{1 ŋŋŋ ŋŋŋ ŋŋŋ ŋŋŋ} R_n R_n+1 R_n+2 R_n+3 R_n+4 R_{n+5 ŋŋŋ ŋŋŋ ŋŋŋ}
Fig. 29
MS0972-E-01
34
2008/12