MN67603NS Datasheet, PDF (3/7 Pages) Panasonic Semiconductor – NTSC Color Camera Synchronizing Signal Generator LSI

For Video Equipment
MN67603NS
Pin Descriptions (continued)
Pin No. Symbol
Pin Name
3
EX4f_SCI External clock input
11 EX910f_SCI External clock input
8
EXT/INT External/internal
synchronization switch
input
9
VR Vertical reset input
12
TEST1 Test input
10
TEST2 Test input
6
SC1
f_SC (R-Y) output
7
SC2
f_SC (B-Y) output
20
SYNC Composite synchronizing
signal output
19
VD Vertical drive output
18
WHD Wide HD output
17
BLK Composite blanking
signal output
16
HD Horizontal drive
output
15
CP2 Clamp pulse output
14
WBLK Composite wide blanking
output
13
BF
Burst flag output
Function Description
Color subcarrier frequency (4f_SC = 14.31818 MHz) input
"H" level input to the EXT/INT pin enables external clock
input. If this pin is not used, keep it at "L" level.
External 910f_H (14.31818 MHz) input for horizontal and
vertical synchronizing signals
"H" level input to the EXT/INT pin enables external clock
input. If this pin is not used, keep it at "L" level.
This pin switches the chip between external and internal
synchronization modes.
"H" level input produces external synchronization;
"L" level, internal synchronization.
When this pin detects falling edge input, synchronizing
signals are reset to the leading edge of the V-SERATION
signal.
The pin includes a built-in pull-up resistor.
Test input Keep this pin at "H" level.
The pin includes a built-in pull-up resistor.
Test input Keep this pin at "H" level.
The pin includes a built-in pull-up resistor.
Color subcarrier frequency signal (3.58 MHz) formed by
dividing the crystal oscillator signal (4f_SC) by four.
Color subcarrier frequency signal (3.58 MHz) formed by
dividing the crystal oscillator signal (4f_SC) by four.
This signal lags SC1 by 90°.
Composite synchronizing signal
Vertical drive output pin (9H)
Wide HD signal
Preblanking signal with pulse width of 9.71 µs
Composite blanking signal
This signal provides a horizontal blanking interval of
10.83 µs and a vertical blanking interval of 21H.
Horizontal drive output signal
Clamp pulses for luminance and color difference signals
Horizontal deflection start pulses
Composite wide blanking signal
This signal provides a horizontal blanking interval of
26.89 µs and a vertical blanking interval of 134.5H.
Gate signal for color subcarrier frequencies
The pulse width is 2.51 µs with the vertical interval (9H)
dropped out.