ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 105

• Manufacturer Part Number: ak8825
• Description: Hd/sd Multi Format Video Encoder With 3ch Dac
• Manufacturer: AKM Semiconductor, Inc.

CGMS-A data should be finished being written 1-line before of the target lines.
CRCC is automatically calculated and added in the AK8825.
Default value of “CRCC Polynomial expressed X6+X+1” are all ones (see diagram bellow)
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.
Rev-E-00
Input
I
2
C Write
D
D
D
Fig. 147
Fig. 148
105
D
Data(n)
SW1
D
D
525i: Line20 / Line283
525p: Line41
1080i: Line19 / Line582
720p: Line24
CGMS-A data Out
b
a
SW2
Output
2008/03
[AK8825]