z86131 ZiLOG Semiconductor, z86131 Datasheet - Page 7

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

ZiLOG
Line 21 Input Parameters (at 1.0V p-p)
Note: Line 21 must be in its proper position to the leading edge
Timing Signals
DS007200-TVX0199
Parameter
Frequency
Frequency
tolerance
Equivalent
XTALs
Parameter
Cod Amplitude
Code Zero Level
Start of Code
Start of Data
Parameter
Dot
Dot Period
Character Cell Width
Width of Row (Box)
Width of Row (Char)
Horizontal Display Timing
of the Vertical Sync signal.
Table 7. XTAL Input on HIN/XIN
and XOUTÑZ86130/131 Only
Conditions
32.768 KHz
+/Ð 20ppm @ Ta=25C, CL=12.5pF
Epson CÐ001R 32.768KÐA or Fox NC26,
NC28
Conditions
50 IRE
5 IRE, +15 IRE relative to Back Porch
10.5 ±0.5 µs (measured from the midpoint of the falling edge of the most recent clock
run-in cycle to the midpoint of the rising edge of the start bit).
3.972 µs, Ð0.00 µsec, +0.30 µs (measured from the midpoint of the falling edge of the
most recent clock run-in cycle to the midpoint of the rising edge of the start bit).
Conditions
768 x FH = 12.0839 MHz
82.75 ns
1.324 µs (tH/48)
45.018 µs (34 chars = 17/24 x tH
42.370 µs (32 chars = 2/3 x tH
The timing of the output signals Box and RGB have been set to make a centered display.
The positioning of these outputs can be adjusted in 330 ns increments by writing a new
value to the Z86129 H Position Register (Address = 02h).
Table 9. Line Input Parameters
Table 10. Timing Signals
P R E L I M I N A R Y
Parameter
Frequency
Table 8. Clock Input on HIN/XINÑZ86130/131 Only
Conditions
32.768 kHz +/Ð 2%
NTSC Line 21 Decoder
Z86129/130/131
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