AK8854VQ Datasheet, PDF (34/95 Pages) Asahi Kasei Microsystems – Multi-Format Digital Video Decoder

[AK8854VQ]
BW-bit: Setting for decoding of input signal as monochrome signal (monochrome mode)
BW-bit
Signal type
Notes
[0]
Not monochrome (monochrome mode OFF)
[1]
Decode as monochrome signal (monochrome mode ON)
*
*Y signal is only decoded.
SETUP-bit: Setting for presence or absence of input signal SETUP.
SETUP-bit
SETUP presence/absence
Notes
[0]
Setup absent
–
[1]
Setup present
7.5IRE Setup
With the Setup present setting, the luminance and color signals are processed as follows:
Luminance signal: Y=(Y-7.5)/0.925
Color signal: U=U/0.925, V=V/0.925
ALLSYNC-bit: Setting for RGB signal with or without sync signal.]
ALLSYNC-bit
Sync signal
[0]
(SOG): There is sync signal on Green only.
(C. H/ V): There are not sync signals on all RGB.
[1]
(SOG):There are sync signals on all RGB.
(C. H/ V): There are sync signals on all RGB.
*(SOG): Sync On Green input
(C, H/ V):CSYNC orH/VSYNC input
CSSL-bit: Setting for sync level.
CSSL-bit
Sync level(mV)
Notes
[0]
300
[1]
286
Notes
*
CSCL-bit: Setting for level of color transform.
CSCL-bit
Transform level
[0]
700mV corresponding
[1]
714mV corresponding
Notes
ç *There is relation between CSSL-bit and CSCL-bit.
CSSL-bit CSCL-bit
[0]
Input sync/ active signal is 300mV/ 700mV.
[0]
[1]
Input sync/ active signal is 300mV/ 700mV.
But, the active level of color transform is 714mV.
[1]
[0]
Input sync/ active signal is 286mV/ 714mV.
But, the active level of color transform is 700mV.
[1]
Input sync/ active signal is 286mV/ 714mV..
Ak8854 acceptH/VSYNC orCSYNC as external sync signal
The register for H/VSYNC orCSYNC is as follows.
CSY[1:0]-bit: Setting for wave form of external sync signal.
CSY-bit
Sync type
[00]
CSYNC1 ~ 4
[01]
CSYNC5H/VSYNC
[10]
CSYNC6
[11]
Reserved
Notes
Refer to fig. 1 ~ 4.
MS0973-E-01
34
2008/07