
PIN
SYMBOL
POLARITY
NAME
FUNCTION
A pulse to clamp the optical black signal. This pulse
is continuous at horizontal cycle when CPMD (pin
25) and CPBL (pin 36) are Low.
and CPBL is Low, output stays Low during the ab-
sence of effective pixels within the Vertical blank-
ing, otherwise is continuous at horizontal cycle.
37
BCP
I
o
n
Optical black
clamp pulse 1
CPMD is High
38
BCP2
o
n
Optical black
clamp pulse 2
BCP2 is
is delayed by 900 ns from BCP
1
.
as BCPI (pin 37) except that BCP2
39
PBLK
o
n
pulse
Equivalent to CBLK (pin 16) pulse except for shorter
pulse width with cut-off trailing edge.
output
The pulse is used in color separator. The signal
switches H and L at every line. It resets at the
14th line when in NTSC, and at the 9th line when
in PAL mode.
40
I
o
Line index pulse 1
The pulse is used in color separator. The signal
switches H and L at every line. It resets at the
277th line when in NTSC, and at the 322th line
when in PAL mode.
41
o
Line index pulse 2
42
WBLK
o
Wide blanking pulse
Equivalent to CBLK (pin 16) except that its pulse
width is wider than that of CBLK.
An input pin for the signal 4 times the color
carrier frequeny.
At NTSC mode : 14,318180 MHz
At PAL mode
: 17.734475 MHz
Connect to L level, when
5) signals are not required.
43
4FSC
4FSC input
(pin 4) and SC2 (pin
44
Test terminal 1
A pin for tests. Set open or to L level in the Normal
mode.
—
: Input pin (CMOS level).
ICU : Input pin (CMOS level with pull-up resistor).
: Input pin (CMOS level with pull-down resistor).
:
Input pin (CMOS level with pull-up resistor)
o
:
Output pin.
TO :
output pin.
281