AK8825 Datasheet, PDF (86/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(1-2) 525i Frame Configuration: Vertical SYNC signal wave form timing
[AK8825]
3H
3H
3H
B
0.5H
A
E
D
F
1
2
3
4
5
6
7
8
9
19
C
19 +1/- 2Line
(set by register)
3H
3H
3H
0.5H
263
264
265
266
267
268
269
270
271
272
273
283
Fig. 122
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
Equalizing Pulse
Serration Pulse
Fig. 123 Equalizing Pulse と Serration Pulse
300mV
or
286mV
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 of 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
Rev-E-00
86
2008/03