AK8826 Datasheet, PDF (93/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(6) 720p Synchronization waveform and timing (EIA-770.3-C )
ç
(6-1-1) 720p Horizontal Sync waveform (60Hz)
50%
V /2
1650T
0H
b
e (260T)
f
f
50%
Sp
f
[AK8826VN]
V /2
50%
Sm
70T
a (40T)
c (40T)
4T
362T
A N C ILLA R Y D ATA or
B LA N K IN G C O D EW O R D S
1280T
4T
1280T
V ID E O D ATA
90%
300m V
BLAN KIN G
300m V
10%
t1
f
t2
BPSRT
BROAD PULSE
BPSTP
Symbol
a
b
c
e
f
t2 – t1
Sm
Sp
V
BPSRT
BPSTP
parameter
Negative line sync width
End of active video
positive line sync width
Start of active video
Rise/fall time
Symmetry of rising edge
Amplitude of negative pulse
Amplitude of positive pulse
Amplitude of video signal
Total Lines
Active Lines
Broad Pulse Start pos
Broad Pulse stop pos
Fig. 138
Nominal value
0.539 [usec]
1.495 [usec]
0.539 [usec]
3.502 [usec]
0.054 [usec]
-
300 [mV]
300 [mV]
700 [mV]
Reference
clock Interval
40
111
40
260
4
-
-
-
-
1650
1280
260
1540
Tolerance
CLK
+/- 3
+/- 3
-0 / + 6
+/- 1.5
Tolerance
+/- 0.040 [usec]
+0.080 [usec]
+/- 0.040 [usec]
+0.080 [usec]
+/- 0.020 [usec]
+/- 0.002 [usec]
+/- 6mV
+/- 6mV
-12, +0
0 ~ +6
-6 ~ 0
+0.080 [usec]
- 0.080 [usec]
MS0972-E-01
93
2008/12