AK8857VQ Datasheet, PDF (69/105 Pages) Asahi Kasei Microsystems – Dual Channel Digital Video Decoder

[AK8857VQ]
○Input Video Status-Register: Indicates status of automatic input signal detection
Register
BIT
Name
R/W
Definition
Input signal subcarrier frequency:
[ ST_VSF1 : ST_VSF0 ] ( MHz )
bit 0 ST_VSF0
Status of Video
[00] : 3.57954545 (NTSC-M,J)
~
~
Sub-Carrier
R [01] : 3.57561149 (PAL-M)
bit 1 ST_VSF1
Frequency
[10] : 3.58205625 (PAL-Nc)
[11] : 4.43361875 (PAL-B,D,G,H,I,N,60 ,
NTSC-4.43)
Input signal color encode format:
bit 2 ST_VCEN0
~
~
bit 3 ST_VCEN1
Status of Video Color
Encode
[ST_VCEN1 : ST_VCEN0]
[00] : NTSC
R
[01] : PAL
[10] : SECAM
[11] : Reserved
bit 4 ST_VLF
Status of
Video Line Frequency
Input signal line frequency
R [0]: 525 line (NTSC-M,J, 4.43, PAL-M,60)
[1]: 625 line (PAL-B,D,G,H,I,N,Nc , SECAM)
Input
signal
monochrome
or
bit 5 ST_BW
Status of B/W Signal
non-monochrome : (*1)
R
[0] : Non-monochrome detected
[1] : Monochrome
Input signal presence or absence (*2)
bit 6 UNDEF
Un_define bit
R [0] : Input signal detected
[1] : No input signal detected
bit 7 FIXED
Input Video Standard
fixed bit
Input signal detection phase (*3)
R [0] : Input signal search in progress
[1] : Input signal search complete
(*1) Monochrome auto detection is enabled if the color killer setting is ON(COLKILL-bit = [1]).
ST_BW-bit changes to [1] when the color killer operates.
If the user has deliberately entered the B/W-bit setting Sub Address 0x01, input signal detection
is limited to 525/625 line detection, and only the ST_VLF information is relevant.
(*2) Shows results of input signal detection.
ç If an input signal is detected, the value is [0]; if no input signal is detected, the value is [1].
(*3) Shows the operating phase of the automatic input signal detector.
The value is [0] while the detection operation is in progress, and [1] when it is completed;
thus, when UNDEF-bit = [1], FIXED-bit = [0].
MS1189-E-01
-69-
2010/12