AK8859VQ Datasheet, PDF (29/73 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

[AK8859VQ]
[7.17.] No signal output
If no input signal is found (as shown by control bit NOSIG-bit), the output signal is black-level, blue-level
(blueback), or input-state (sandstorm), depending on the register setting. (*Sub-address:0x15-“bit0”)
Settings for output signals for no input signal
Name
Definition
NSIGMD0
~
NSIGMD1
[ NSIGMD1 : NSIGMD0 ]
[00]: Black-level output
[01]: Blue-level (blueback) output
[10]: Input-state (sandstorm) output
[11]: Reserved
Sub Address: 0x07 [3:2]
In case of S-Video (Y/C) signal input, no signal output is only on Y signal.
It should be noted that there is no signal output detect on C signal.
[7.18.] Active video data start position
The start position of active video data of the AK8859VQ can be advance/delay via register. 1 sample
advance/delay of data rate is 13.5MHz.
Setting for start position of active video data
Name
Definition
ACTSTA0
~
ACTSTA2
[ ACTSTA2 : ACTSTA0 ]
[001]: 1Sample delay
[010]: 2Sample delay
[011]: 3Sample delay
[000]: Normal start position
[101]: 3Sample advance
[110]: 2Sample advance
[111]: 1Sample advance
[100]: Reserved
Sub Address: 0x07 [6:4]
The default position of start position is shown below (ITU-R BT.601 standard interface).
OH
122sample(525Line)
Active video start
OH
132sample(625Line)
Active video start
MS1178-E-00
AKM Confidential
- 29 -
2010/04