AK8815 Datasheet, PDF (32/37 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
[AK8815/16]
VBID/WSS 1 Register (R/W) [Address 0x01]
VBID/WSS 2 Register (R/W) [Address 0x02]
Video ID and WSS data setting are made. A common data register is used for both video ID and WSS data.
When VBID bit of mode register is set in NTSC mode, data is for VBID data ,and when WSS bit of mode
register is set in PAL mode, data is for WSS data.
When VBID-bit is “1” and VMOD-bit is “0” in mode register, the following bits are assigned.
Sub Address 0x01
default Value 0x00
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
VBID7
VBID8
VBID9
VBID10
VBID11
VBID12
VBID13
VBID14
Default Value
0
0
0
0
0
0
0
0
Sub Address 0x02
bit 7
bit 6
Reserved
Reserved
0
0
bit 5
VBID1
0
bit 4
bit 3
VBID2
VBID3
Default Value
0
0
bit 2
VBID4
0
default Value 0x00
bit 1
bit 0
VBID5
VBID6
0
0
Note ) “0” should be written into reserved bits.
VBID1 ---- VBID14 above correspond to the bit 1 ---- bit 14 which are described at { VBID Data Code Assignment }
in { ( 14 ) Video ID } section.
A 6-bit CRC code from bit 15 ~ bit 20 is automatically added by the AK8815/16.
Data is retained till data is updated to a new one.
Following bits are assigned when WSS-bit is “1” and VMOD-bit is “1” in mode register.
Sub Address 0x01
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
G2-7
G2-6
G2-5
G2-4
G1-3
G1-2
Default Value
0
0
0
0
0
0
default Value 0x00
bit 1
bit 0
G1-1
G1-0
0
0
Sub Address 0x02
bit 7
bit 6
Reserved
Reserved
0
0
bit 5
G4-13
0
bit 4
bit 3
G412
G4-11
Default Value
0
0
bit 2
G3-10
0
default Value 0x00
bit 1
bit 0
G3-9
G3-8
0
0
Note ) WSS data is written with 0x01 first, then 0x02 in this order.
When the 2^nd byte ( 0x02 ) of WSS data is written, the AK8815/16 interprets that data is updated to a new one and
then encodes it to the next video line ( Line 23 ).
Data is retained till data is updated to a new one.
MS0331-E-00
32
2004 / 08