AK8854VQ Datasheet, PDF (28/95 Pages) Asahi Kasei Microsystems – Multi-Format Digital Video Decoder

[AK8854VQ]
[RGB signal decoding]
“Sync on Green”
(G signal)
AK8854 clamps the G signal to sync tip.
The clamp timing pulse, with its origin at the falling edge of the internally synchronized and
separated sync signal, is generated at approximately the central position of the sync signal.
(B, R signal)
AK8854 clamps the B and R signal to the pedestal level. The clamp timing pulse is generated at
same timing with G signal. (analog bottom clamp)
But, if ALLSYNC is [1], AK8854 clamps all RGB signal to sync tip.
“H/VSYNC or CSYNC”
AK8854 clamps all RGB signal to the pedestal level. The clamp timing pulse, with its origin at the
falling edge of the internally synchronized and separated sync signal, is generated at
approximately the central position of the sync signal. (analog bottom clamp)
But, if ALLSYNC is [1], AK8854 clamps all RGB signal to sync tip.
ALLSYNC-bit: Setting for sync signal of RGB input.
ALLSYNC-bit
Sync signal of RGB
Notes
[0]
(SOG): R and B signals don’t contain sync signal.
(C, H/V): All RGB signals don’t contain sync signal.
[1]
(SOG): R and G signals also contain sync signal.
(C, H/V): All RGB signals contain sync signal.
(SOG): Sync On Green
(C,H/V): CSYNC or H/VSYNC
Pulse positions are bellow.
MS0973-E-01
28
2008/07