AK8826VN Datasheet, PDF (101/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

CGMS-A data should be finished being written 1-line before of the target lines.
[AK8826VN]
I²C Write
Data(n)
Fig. 146
CRCC is automatically calculated and added in the AK8826.
Default value of “CRCC Polynomial expressed X6+X+1” are all ones (see diagram bellow)
SW1
CGMS-A data Out
525i: Line20 / Line283
525p: Line41
1080i: Line19 / Line582
720p: Line24
D
Input
D
D
D
D
D
b
SW2
Output
a
Fig. 147
CRCC generation is made as follows -
Set default values to all ones and closed SW1.
Set SW2 to “a” position and first 14bit data is input, then at the 15th bit open SW1 and set SW2 to “b” position, and CRCC is
output.
When CGMS-A output and other signal waveforms coincide, CGMS-A precedes.
MS0972-E-01
101
2008/12