SAA4960 Просмотр технического описания (PDF) - Philips Electronics
Номер в каталоге
Компоненты Описание
Список матч
SAA4960 Datasheet PDF : 24 Pages
| |||
Philips Semiconductors
Integrated PAL comb filter
Preliminary specification
SAA4960
REFBP (PIN 5)
Decoupling capacitor for the band-pass filter reference
voltage.
SSYN (PIN 6)
Input signal that controls the function of BYP (pin 3).
VCCA, VCCO, VDDD AND VCCPLL (PINS 7, 8, 22 AND 27)
Supply voltages.
AGND, OGND, DGND AND PLLGND (PINS 9, 11,
21 AND 26)
Ground connection. AGND is used as signal reference for
all analog input and output signals.
Cext (PIN 10)
Input for an external chrominance signal which is
correlated to the external VBS signal.
Table 6 YO output signal
MODE
COMB
BYPASS
YO OUTPUT SIGNAL
comb filtered luminance signal
external CVBS signal of Yext/CVBS input
CVBSO (PIN 15)
CVBS output signal directly from the input in
BYPASS-mode or delayed by the signal processing time
of 2 lines and an additional processing delay.
Table 7 CVBSO output signal
MODE
COMB
BYPASS
CVBSO OUTPUT SIGNAL
delay compensated CVBS signal
external CVBS signal of Yext/CVBS input
Yext/CVBS (PIN 17)
Input for the CVBS signal or for an external VBS signal.
CO (PIN 12)
Chrominance output signal. This output can be switched
between the comb filtered chrominance from the CVBS
signal and the external chrominance signal from the input
Cext if the IC is forced into BYPASS-mode.
Table 4 CO output signal
MODE
COMB
BYPASS
CO OUTPUT SIGNAL
comb filtered chrominance signal
external chrominance signal of Cext input
FSCSW (PIN 13)
Input signal to select between fsc or 2 × fsc as reference at
the FSC input pin.
Table 5 Reference frequency selection
FSCSW
HIGH
LOW
SELECTED REFERENCE
2 × fsc
fsc
LPFION (PIN 18)
Input signal to disable the internal pre-filter LPFI.
Table 8 Pre-filter mode
LPFION
LOW
HIGH
Floating
SELECTED MODE
LPFI inactive
LPFI active
LPFI active
CSY (PIN 19)
Sync top capacitor for the sync separator.
REFDL (PIN 24)
Decoupling capacitor for the delay line reference voltage.
COMBENA (PIN 25)
Output signal that indicates the current mode of operation.
This output is forced to LOW if the comb filter is in
BYPASS-mode.
YO (PIN 14)
VBS output signal. This output can be switched between
the comb filtered luminance signal (including
synchronization) and the external (C)VBS signal from the
input Yext/CVBS. In COMB-mode the output signal is
delayed by 2 lines and by an additional processing delay.
Table 9 Mode of operation
COMBENA
SELECTED MODE
LOW
BYPASS-mode; PLL and clock processing
stopped
HIGH
COMB-mode
1996 Oct 15
6
Share Link: 