AK8853XQ Datasheet, PDF (18/70 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

[AK8853XQ/ VN]
The register settings for the input signal characterization are essentially as follows.
VSCF[1:0]-bits: Setting for subcarrier frequency of input signal.
VSCF[1:0]-bits
Subcarrier frequency (MHz)
[00]
3.57954545
[01]
3.57561149
[10]
3.58205625
[11]
4.43361875
*For SECAM input signal, set VSCF[1:0] to [11].
Formats
NTSC-M,J
PAL-M
PAL-Nc
PAL-B, D, G, H, I, N, NTSC-4.43,
PAL-60, SECAM*
VCEN[1:0]-bits: Setting for color encode format of input signal.
VCEN[1:0]-bits
Color encode format
[00]
NTSC
[01]
PAL
[10]
SECAM
[11]
Reserved
Notes
VLF-bit: Setting for line frequency of each input frame.
VLF-bit
Number of lines
[0]
525
[1]
625
Notes
NTSC-M, J, NTSC-4.43, PAL-M, PAL-60
PAL-B, D, G, H, I, N, Nc, SECAM
BW-bit: Setting for decoding of input signal as monochrome signal (monochrome mode)
BW-bit
Signal type
[0]
Not monochrome (monochrome mode OFF)
[1]
Decode as monochrome signal (monochrome mode ON)
In the monochrome mode, the input signal is treated as a monochrome signal, and all sampling data
digitized the the AD converter passes through the luminance process and is processed as a luminance
signal. Thus, with this bit ON, the signal input to the Y/C separation block is all output as luminance
signal data to the luminance signal processing block.
In the monochrome mode, the CbCr code is output as 0x80 (601 level data) regardless of the input.
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
Rev-E-00
18
2008/01