MN67621F Datasheet, PDF (4/11 Pages) Panasonic Semiconductor – Color Video Camera Synchronizing Signal Generator LSI

MN67621F
For Video Equipment
Pin Descriptions (continued)
Pin No. Symbol
Pin Name
9
WBLK Composite wide blanking
output
20
BFIDP Output for burst flag/
identification signal
6
PBLK Composite preblanking
output
21
LSW Line switch signal
output
23
FMTP Trigger signal output
24
SCBLK Subcarrier blanking
signal output
40
EO Phase comparator
output
Function Description
Composite wide blanking signal
This pin produces blanking pulses wider than the CELK
pulses for both horizontal and vertical synchronization.
For NTSC and PAL systems, this is the burst flag (BF)
output, which gates the color subcarrier signal.
For the SECAM system, this is the identification (IDP)
signal, which switches the subcarrier waveform.
Composite preblanking signal
This pin produces blanking pulses narrower than the CBLK
pulses for both horizontal and vertical synchronization.
Line switch signal
The chip generates this signal for each horizontal scan line.
During NTSC operation, this pin remains at "L" level.
This pin provides the FM demodulator trigger signal for the
SECAM system.
During NTSC operation, this pin remains at "L" level.
This pin provides the signal for erasing the subcarrier signal
for the SECAM system.
During NTSC operation, this pin remains at "L" level.
Phase comparator output
Operating Modes
(1) Television system
NTSC
PAL
SECAM
TVMD1
H
L
L
TVMD2
—
H
L
(2) CCD pixels and reference clock (CLK) frequencies
CCD
pixels
420H
CCDS1 CCDS2
H
H
510H
H
L
590H
L
H
670H
L
L
CLK frequency (MHz)
NTSC
PAL/SECAM
15.891606
16.09375
(1010f_H)
9.534964
(1030f_H)
9.65625
(606f_H)
22.248249
(618f_H)
22.53125
(1414f_H)
25.426570
(1442f_H)
25.75000
(1616f_H)
(1648f_H)
Frequency divider ratio
for first stage
1/5
1/3
1/7
1/8