AK8856 Datasheet, PDF (39/105 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

ASAHI KASEI
[ AK8856 ]
Information read-out flow during VBI interval:
Start
[ Request VBI Info Register ]
xxRQ-bit = 1
( Decode Request )
Closed Caption: CCRQ-bit
Closed Caption Extended : EXTRQ-bit
VBID/WSS: VBWSRQ-bit
[ Status Register ] Read
( Verification of decode completion )
( Corresponding bit
is “1” to the
request ? )
Yes
( Read-out of the corresponding
data register to the request )
No
Closed Caption: CCDET-bit
Closed Caption Extended : EXTDET-bit
VBID/WSS: VBWSDET-bit
Closed Caption: [Closed Caption 1/2 Register]
Closed Caption Extended : [Extended Data 1/2 Register]
VBID/WSS: [VBID/WSS 1/2 Register]
Rev-01
39
2007/03