saa4700t NXP Semiconductors, saa4700t Datasheet - Page 5

• Manufacturer Part Number: saa4700t
• Description: Saa4700t Vps Dataline Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Composite sync output (CSO)
A composite sync output signal for customer application is
provided (pin 6).
DAV output
The data available output pin 13 is set LOW after an error
free data line 16 is received. DAV returnes to HIGH after
the beginning of the next first field. If no valid data is
available DAV remains HIGH.
A short duration pulse of 1 s (Fig.5) is inserted at the
beginning of dataline 16; it will ensure that a HIGH-to-LOW
transmission occurs which can then be used for triggering.
Table 1 Information per word in dataline 16
March 1991
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
VPS dataline processor
WORD NUMBER
run in
start code
program source identification (binary coded)
program source identification (ASCII sequential)
sound and VTR control information
program/test picture identification
internal information exchange
address assignment of signal distribution
messages/commands
VTR control / information
reserve
5
5 MHz VCO and phase detector
The resistor connected between pin 15 and V
determines the current into the voltage controlled
oscillator. The RC network connected to pin 19 acts as a
low-pass filter for the phase detector.
Power supply
To prevent crosscoupling the circuit is provided with
separate ground and supply pins for analog and digital
parts (pins 3, 4, 17 and 18).
CONTENT
Preliminary specification
SAA4700T
P2