AK8826 Datasheet, PDF (113/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(1-2-1) Vertical SYNC Signal Timing (NTSC/NTSC4.43)
3H
3H
3H
B
0.5H
A
E
D
F
1
2
3
4
5
6
7
8
9
C
19 +1/- 2 Lin e
(Ϩ δ ε λ ʹ ͯ ઃ ఆ )
3H
3H
3H
0.5H
[AK8826VN]
19
263
264
265
266
267
268
269
270
271
272
273
283
Fig. 163
Symbol
A
B
C
D
E
F
G
Duration
429T
858T
31T
429T
858T
63T
Measurement point
50%
Reference
13.5MHz Clock
H
I
I
I
I
286mV
Equalizing Pulse
Serration Pulse
Fig. 164 Equalizing Pulse and Serration Pulse
Symbol
Measurement
point
Value
Field Period (derived)
16.6833
Frame period (derived)
33.3667
Vertical blanking start before first
equalizing pulse
50%
1.5
Vertical blanking
19* lines + 1.5
(63.556usec x 20lines + 1.5usec)
usec
Pre-equalizing duration
3
G Pre-equalizing pulse width
50%
2.3
Vertical sync duration
3
H Vertical serration pulse width
50%
4.7
Post-equalizing duration
3
G Post-equalizing pulse width
50%
2.3
I
Sync rise time
140
* There is a case with V-Blank of 20 Lines. This value is pre-settable by register.
Recommended
tolerance
+/- 0.1
0
+/- 0.1
+/- 0.1
+/- 0.1
+/- 0.1
+/- 20
units
msec
msec
usec
lines
usec
lines
usec
lines
usec
lines
usec
nsec
MS0972-E-01
113
2008/12