z86230 ZiLOG Semiconductor, z86230 Datasheet - Page 14

• Manufacturer Part Number: z86230
• Description: Advanced Violence Blocking And Ntsc Line 21 Xds
• Manufacturer: ZiLOG Semiconductor

T
14
Symbol
HIN/XIN 5
V
VIDEO
CSYNC
ABLE
SS
1. P
IN
Pin #
6
7
8
D
ESCRIPTIONS
P
IN
Function
Horizontal In/XTAL In Input
Power Supply
(digital) GND
Composite Video
Composite Sync
D
ESCRIPTIONS
Z86230—PRELIMINARY
Direction
N/A
Input
Output
Description
frequency signal may be generated on the chip
using the external 32.768-kHz crystal circuit, as
shown below. This circuit must be connected
between pin 5 and 3.
When HIN mode is selected, a horizontal
frequency signal must be supplied to the pin.
This signal must be within +3% Fh; however,
the frequency signal can exhibit any polarity
and duty cycle. Alternatively, an external
horizontal frequency signal may be used in
XIN mode operation. In this case, the signal
must exhibit a frequency of 32.768 KHz.
This pin is the lowest potential power pin for
the digital circuit that is typically tied to
system ground.
Composite NTSC video input, 1.0V p-p (nom),
band limited to 600 kHz. The circuit operates
with signal variation between 0.7–1.4V p-p.
The polarity is sync tips negative. This signal
pin should be AC-coupled through a 0.1 µF
capacitor and driven by a source impedance
of 470 ohms or less.
Sync slice level. A 0.1 µmF capacitor must be
tied between this pin and analog ground
V
level voltage.
When XTAL mode is selected, the horizontal
SS
Crystal Type: 32.768 kHz, CL=12.5pF
(A). This capacitor stores the sync slice
Z86230
B
Pin 5
Pin 3
LOCK
Series Resistance < 35 kOhms
Epson, C-001R 32.768 kHz or
Fox, NC26, NC28 or equivalent
D
32.768KHz
IAGRAM AND
Y1
R2
470K
O
(18 kOhms typ)
PS000400-TVC0499
PERATIONAL
R1
22M
C2
20pF
C1
10pF
O
VERVIEW