AK8854VQ Datasheet, PDF (33/95 Pages) Asahi Kasei Microsystems – Multi-Format Digital Video Decoder

[AK8854VQ]
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
[YPbPr signal decoding]
The AK8854 can decode the following video signals, in accordance with the register setting.
525i, 625i (EIA-770.1-A and EIA-770.2-A)
VLF-bit: Setting for line frequency of each input frame.
VLF-bit
Number of lines
[0]
525
[1]
625
Notes
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
CSSL-bit: Setting for sync level of Y signal.
CSSL-bit
Sync level(mV)
[0]
300
[1]
286
Notes
EIA-770.2-A
EIA-770.1-A
[RGB signal decoding]
The AK8854 can decode the following video signals, in accordance with the register setting.
525i, 625i (SMPTE-253M)
VLF-bit: Setting for line frequency of each input frame.
VLF-bit
Number of lines
[0]
525
[1]
625
Notes
RGBSS[1:0]-bits: Selecting sync signal for RGB intput.
RGBSS-bits
Sync signal
[00]
Sync On Green
[01]
CSYNC
[10]
H/VSYNC
[11]
Reserved
Notes
MS0973-E-01
33
2008/07