AK8826VN Datasheet, PDF (102/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

(2) CEA-805-B
[AK8826VN]
This standard is adopted to 480p / 1080i / 720p output mode. CEA805-B Type-A standard is same as CEA-805-A standard.
700mV
70%
0H
S SB : Star Symbol
H : White Peak (70+/- 10)%
•••
0
-300mV
a
b
b
b
b
L : 0 (+10 / - 5) %
Fig. 148
a
b
Tolerance form 0H
Line
480P*¹
156T
(Time from 0H)
4T
+/- 18.5ns
T : 1/27MHz
Line 43
1080i
720P
308T
232T*²
10T
+/- 18.5ns
T : 1/74.25MHz
Line 18
Line 581
8T
+/- 18.5ns
T : 1/74.25MHz
Line 23
*1 SYNC signal waveform of 480p differ from the above, but timing is defined based on 0H point as starting points.
*2 position of 232T is the position before starting active video area.
When to set CEA-805-B TypeB Data, set HDCEA805B-bit of HD Block Miscellaneous Control Register[SubAddress 0x0A]
to “1”, and write a setting value to VBID-B Header Data Register/VBID Version Number Register/VBID Payload Packet
Length Register/VBID-B Data1/2/3/4/5/6/7/8/9/10/11/12/13 Register {SubAddress 0x40 - 0x50}
CRCC is automatically calculated and added in the AK8826.
Default values of “CRCC Polynomial expression X6+X+1” are all ones (see diagram bellows)
SW1
D
Input
D
D
D
D
D
Fig. 149
b
SW2
Output
a
MS0972-E-01
102
2008/12