NT68520XF Datasheet, PDF (21/97 Pages) List of Unclassifed Manufacturers – XGA,SXGA Flat Panel Monitor Controller

NT68520X,E
Sync-On-Green. The SYNCI_SEL1/0 bit in Sync Input Control register will determine
the type of the input sync sources. All HSYNCI, VSYNCI, and SOGI inputs have internal
Schmitt trigger to improve noise immunity.
YUV
HSYNCI
YUV
VSYNCI
VSYNCI
HSYNCI
SOGI
1
0
VIDEO_SEL(12H.1)
1
0
Interlace
Mode
Detector
INTERCE
(87H.4)
VIDEO_SEL(12H.1)
H-Counter
&
V-Timer
V-Pol
Normalize
V-Pol
Normalize
V _in
1
0
V _ex
SEP_SEL
SYNCO_SEL
(88H.2)
V_IN
1
V
0
FREE
SYNCI_SEL1
(87H.7)
1
0
EN_INS(88H.3)
Separator
&
Insert
Hc
0
H-Pol
1
Hs
Normalize
SYNCI_SEL1
(87H.7)
SYNCI_SEL0
(87H.6)
SEP_SEL
Free-run
Gen
H_FREE
0
H _IN
1
Fast
Mute
SYNCO_SEL
(88H.2)
INT_FM(90H.0)
Polarity
INT_HP(90H.2)
INT_VP(90H.1)
for INT_V(90H.6)
for INT_H(90H.7)
VO_POL(88H.0) EN_VOUT(88H.6)
Vsync Output
VSYNCO
EN_VRUN(88H.4)
EN_FRUN(88H.7)
EN_HRUN(88H.5)
EN_HOUT(88H.7)
Hsync Output
HO_POL(88H.1)
HSYNCO
Block Diagram of Sync Processor
Sync Inputs
The video sync signals input from the pins HSYNCI, VSYNCI, and SOGI. All VSYNCI,
HSYNCI and SOGI pins have Schmitt Trigger and digital filter to improve noise immunity.
Any pulse shorter than 125ns is regarded as a glitch and ignored.
SYNCI_SEL SYNCI_SEL
1
0
Sync Source
0
-
Composite Sync from SOGI
1
0
Composite Sync from HSYNCI
2003/4/15
21
Ver.1.0