AK8813 Datasheet, PDF (30/51 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHIKASEI
(1-2-1) HSYNC 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
(S et C ontro l R e gister)
3H
3H
3H
0.5H
[AK8813/14]
19
263
264
265
266
267
268
269
270
271
272
273
283
Symbol
A
B
C
D
E
F
Duration
429T
858T
31T
429T
858T
63T
Fig. 17 HSYNC Timing
Measurement point
Reference
50%
13.5MHz Clock
G
H
I
I
I
I
286mV
Equalizing Pulse
Serration Pulse
Fig. 18 Equalizing Pulse and Serration Pulse
Symbol
Field Period (derived)
Frame period (derived)
Vertical blanking start before first
equalizing pulse
Vertical blanking
(63.556usec x 20lines + 1.5usec)
Pre-equalizing duration
G Pre-equalizing pulse width
Vertical sync duration
H Vertical serration pulse width
Post-equalizing duration
G Post-equalizing pulse width
I
Sync rise time
*This value can be set by the register.
Measurement
point
50%
50%
50%
50%
Value
16.6833
33.3667
1.5
19* lines + 1.5
usec
3
2.3
3
4.7
3
2.3
140
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.00
- 31 -
2004/Oct