C SYNC
COMPOSITE
SYNC OUTPUT
(Pin 1)
-
VIDEO
INPUT
(Pin 2)
-
+
V SLICE
HORIZONTAL
+
-
+
ODD / EVEN
OUTPUT
(Pin 7)
D
Q
Q
Q
Q
D
G
V CLAMP
WINDOWING
CIRCUIT
CLK
85µ
11µ
NOSYNC
V
CC
VERTICAL SYNC
OUTPUT
D
Q
Q
(Pin 8)
VOLTAGE
REGULATOR
VERTICAL
DETECTOR
(PIN 3)
CLK
1.2V
BACK PORCH
OUTPUT
(Pin 5)
R_SET
(Pin 6)
BACK PORCH
DETECTOR
TIMING
CURRENTS
Fig. 17 GS1881 Block Diagram
C SYNC
COMPOSITE
SYNC OUTPUT
(Pin 1)
-
VIDEO
INPUT
(Pin 2)
-
+
V SLICE
HORIZONTAL
+
-
+
ODD / EVEN
OUTPUT
(Pin 7)
D
G
Q
Q
V CLAMP
D
Q
Q
WINDOWING
CIRCUIT
CLK
85µ
11µ
NOSYNC
B PEN
V
CC
VERTICAL SYNC
OUTPUT
(Pin 8)
D
Q
Q
VOLTAGE
REGULATOR
VERTICAL
DETECTOR
(PIN 3)
CLK
BACK PORCH
OUTPUT
1.2V
(Pin 5)
R_SET
(Pin 6)
BACK PORCH
DETECTOR
TIMING
CURRENTS
Fig. 18 GS4881 Block Diagram
520 - 23 - 03
9
GENNUM [ GENNUM CORPORATION ]
