ak8823 AKM Semiconductor, Inc., ak8823 Datasheet - Page 54

• Manufacturer Part Number: ak8823
• Description: Hdtv & Ntsc/pal Multi-format Encoder Sdtv/hdtv X2 Oversampling 5ch Dacs
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
( 1-2-1 ) Vertical SYNC Signal Timing ( NTSC / NTSC-4.43 )
* there is a case with V-Blank of 20 Lines. This value is pre-settable by register.
MS0549-E-02
Symbol
G
H
G
I
2 6 3
Symbol
Field Period (derived)
Frame period (derived)
Vertical
equalizing pulse
Vertical blanking
(63.556usec x 20lines + 1.5usec)
Pre-equalizing duration
Pre-equalizing pulse width
Vertical sync duration
Vertical serration pulse width
Post-equalizing duration
Post-equalizing pulse width
Sync rise time
1
C
D
A
B
E
F
Equalizing Pulse
2 6 4
I
C
G
A
B
blanking
2
3 H
3 H
2 6 5
Duration
I
429T
858T
429T
858T
0 .5 H
0 .5 H
31T
63T
3
start
2 6 6
before
4
Equalizing Pulse and Serration Pulse
2 6 7
D
first
Measurement point
3 H
3 H
E
5
(R e g is te r s e ttin g )
2 6 8
1 9 + 1 /- 2 L in e
Measurement
50%
54
F
point
6
50%
50%
50%
50%
2 6 9
7
2 7 0
19* lines + 1.5
16.6833
33.3667
3 H
3 H
13.5MHz Clock
Value
usec
8
140
1.5
2.3
4.7
2.3
I
3
3
3
Reference
2 7 1
Serration Pulse
9
H
2 7 2
Recommended
I
tolerance
+/- 0.1
+/- 0.1
+/- 0.1
+/- 0.1
+/- 0.1
+/- 20
2 7 3
0
1 9
286mV
2006/10
[AK8823]
msec
msec
usec
lines
usec
lines
usec
lines
usec
lines
usec
2 8 3
units
nsec