el4511 Intersil Corporation, el4511 Datasheet - Page 21

• Manufacturer Part Number: el4511
• Description: Super Sync Separator
• Manufacturer: Intersil Corporation

EnTriLevel, EnBiLevel and EnHinVin; these enable tri-level sync
detection, two-level sync detection and separate H/V (VGA) sync
detection, respectively.
Other signals used to prioritize tri-level syncs (TriLevPriority),
separate H/V (Hin Priority), or to only allow signals from
HIN/VERTIN (HinVinOnly).
b5 b4 b3
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
MODE
CTRL
Reg 1
TABLE 3. MODE CONTROL TRUTH TABLE
(see also Table 2 for hardware over-ride)
Level
EnTri
1
1
1
1
0
0
0
0
Level
EnBi
1
1
1
0
1
1
1
1
EnHin
Vin
1
1
1
0
1
0
1
1
21
TriLevel
Priority
0
0
1
1
0
0
0
0
Priority
Hin
0
1
0
0
0
0
1
1
HinVin
Only
0
0
0
0
0
0
0
1
EL4511
REGISTER
14
16
16
8
8
8
9
9
9
TABLE 4. ACQUISITION CONTROL SIGNALS
BIT
3
1
0
5
4
2
5
4
3
En50Slice
Progressive
Tri-Level
Detected
ENLEVEL
BLANKING
ENLEVEL
ENALOS
SYNCLOCK Same information as
RateLocked
ALOS
SIGNAL
NAME
1 = Sample and Hold front
end is in use
1 = Progressive scan
detected
1 = Tri-Level syncs detected
1 = V
when system is not locked
1 = Disable V
1 = Analog loss of signal not
used in lock indication.
SYNCLOCK pin 3
Line rate is locked
Sync Amplitude is below
minimum
LEVEL
DESCRIPTION
is available
LEVEL
July 21, 2005
Output
FN7009.7