AK8854VQ Datasheet, PDF (48/95 Pages) Asahi Kasei Microsystems – Multi-Format Digital Video Decoder

[AK8854VQ]
CLKMODE[1:0]-bits: Settings for selection of clock generation mode
CLKMODE[1:0]-bits
Clock generation mode
[00]
Automatic
[01]
Line-locked
[10]
Frame-locked
[11]
Fixed-clock
Notes
—
—
—
—
7.15 Phase correction
In PAL-B, D, G, H, I, N, Nc, 60, and M decoding, the AK8854 performs phase correction for each line.
With this function ON, color averaging is performed for each line. In the adaptive phase correction mode,
interline phase correlation is sampled and color averaging is performed for correlated samples.
Interline color averaging is also performed in NTSC-M and J decoding.
No phase correction or color averaging is performed in SECAM decoding.
DPAL[1:0]-bits: Settings for phase correction
DPAL[1:0]-bits
Status
[00]
Adaptive phase correction mode
[01]
Phase correction ON
[10]
Phase correction OFF
[11]
Reserved
DPAL must be set [10] when input signal is YPbPr or RGB.
Notes
Default
—
—
—
7.16 No-signal output
If no input signal is found (as shown by the control bit NOSIG-bit), the output signal is black-level, blue
level (blueback), or input-state (sandstorm), depending on the register setting.
NSIGMD-bits: Settings for output signals for no input signal
NSIGMD [1:0]-bits
Output
[00]
Black-level
[01]
Blue-level (blueback)
[10]
Input-state (sandstorm)
[11]
Reserved
Notes
—
—
—
—
Detected signal for no-signal detection is as follows.
Input signal
Detected Signal
CVBS
CVBS
S-Video
Y only
YPbPr
Y only
Sync On Green G only
RGB CSYNC
C only
H/VSYNC
H-sync
Notes
MS0973-E-01
48
2008/07