z86131 ZiLOG Semiconductor, z86131 Datasheet - Page 10

• Manufacturer Part Number: z86131
• Description: Ntsc Line 21 Decoder
• Manufacturer: ZiLOG Semiconductor

Z86129/130/131
NTSC Line 21 Decoder
PIN DESCRIPTIONS (Z86130/131 ONLY) (Continued)
NReset input. In either mode, NReset must be held Low (0)
for at least 100 ns.
Input/Output
V
used as V
PB (Program Blocking), in Z86130.
In the Z86130, as described in the Input section, PB output
is High for indicating the incoming video program is in the
program blocking set-up.
In the Z86131, this pin is an output providing an interrupt
signal to the master control device in accordance with the
settings in the interrupt Mask Register.
SDA (Pin 14).
I
line for sending and receiving serial data. In SPI mode op-
eration it operates as serial data input. SPI mode output data
is available on the SDO pin.
Outputs
SDO (Pin 16).
mode communications have been selected. This pin is not
used in I
PB (Pin 13).
V
above.
10
2
IN
C mode operation, this pin serves as the bidirectional data
IN
/INTRO (PB:Z86130 only; Pin 13).
/INTRO(PB) descriptions in the Input/Output section
2
IN
C mode operation.
/INTRO for Z86131. It is a dedicated output pin,
This pin is for the Z86130 only and refer to
When the Serial Control Port has been set to
Provides the serial data output when SPI
This pin can be
P R E L I M I N A R Y
XOUT (Pins 3).
connect for inputting 32.768-kHz frequency from external
device.
CSync (Pin 8).
be tied between this pin and analog ground V
capacitor stores the sync slice level voltage.
LPF (Pin 9).
be tied between this pin and analog ground V
must also be second capacitor from the pin to V
ues for the three parts to be specified at a later date.
RREF (Pin 10).
be 10 kohms, ±2%.
NC.
Pin 17, 18.
Power Supply
V
and may range between 4.75 to 5.25 Volts with respect to
the V
V
pins for the analog and digital circuits. They are normally
tied to system ground.
Note: The recommended printed circuit pattern for implement-
DD
SS
No Connect
(Pins 11).
(Pin 12).
SS
ing the power connection and critical components is in
the Application Information section, page 58.
pins.
These pins are NC (No Connect).
Loop Filter. A series RC low-pass filter must
The voltage on this pin is nominally 5.0 Volts
These pins are the lowest potential power
Sync slice level. A 0.1-µF capacitor must
Reference setting resistor. Resistor must
This pin is XTAL output. It is be NC (No
DS007200-TVX0199
SS
SS
SS
(A). There
(A). This
(A). Val-
ZiLOG