ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 56

• Manufacturer Part Number: ak8825
• Description: Hd/sd Multi Format Video Encoder With 3ch Dac
• Manufacturer: AKM Semiconductor, Inc.

(1) EAV Decode mode
(1 -1 ) EAV Decode
EAV code which is encoded on input data stream is decoded, and the device makes synchronization with its timing. At the time
of 16-bit width data input case, synchronization is made with EAV of the Y7-Y0 data, and it is not reference to the EAV/SAV
which are contained in CbCr7-0 data.
In case of RGB data input mode, AK8825 doesn’t support this interface mode.
EAV/SAV Code
Those codes succeeding 0xFF - 0x00 - 0x00 which are fed as input data become EAV/SAV codes.
EAV/SAV codes have following meanings, started with MSB.
Following is a relation between Protection bit and F/V/H-bit.
Reference standards
Rev-E-00
WORD
0
1
2
3
Bit Number
Input Data
F
0
0
0
0
1
1
1
1
1080i
525p
625p
720p
F
(F-bit is always 0 in case of Progressive data)
V
H
P3, P2, P1, P0: Protection Bit
525i
625i
VALUE
0xFF
0x00
0x00
0xxx
= 0 : Field 1
= 1 : Field 2
= 0 : Field Blanking (V-Blanking) 以外
= 1: Field Blanking (V-Blanking)
= 0: SAV
= 1: EAV
MSB
V
0
0
1
1
0
0
1
1
7
1
0
0
1
ITU-R. BT1358
SMPTE 293M
SMPTE 274M
SMPTE 296M
ITU-R.BT656
ITU-R.BT656
Reference
F
6
1
0
0
H
0
1
0
1
0
1
0
1
V
5
1
0
0
H
4
1
0
0
P3
0
1
1
0
0
1
1
0
56
P3
3
1
0
0
P2
0
1
0
1
1
0
1
0
P2
2
1
0
0
P1
1
1
0
0
P1
0
0
1
1
1
1
0
0
LSB
P0
0
1
0
0
P0
0
1
1
0
1
0
0
1
2008/03
[AK8825]