AK8817_07 Datasheet, PDF (37/43 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
VBID/WSS 1 Register (R/W) [Address 0x02]
VBID/WSS 2 Register (R/W) [Address 0x03]
[AK8817/18]
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 Control 1 Register is set
in
PAL mode, data is for WSS data.
When VBID-bit is “1” and VMOD-bit is “0” in Control 1 Register , the following bits are assigned.
Sub Address 0x02
bit 7
bit 6
VBID7
VBID8
0
0
bit 5
VBID9
0
bit 4
bit 3
VBID10
VBID11
Default Value
0
0
bit 2
VBID12
0
default Value 0x00
bit 1
bit 0
VBID13
VBID14
0
0
Sub Address 0x03
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 AK8817.
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 Control 1 Register .
Sub Address 0x02
bit 7
bit 6
G2-7
G2-6
0
0
bit 5
G2-5
0
bit 4
bit 3
G2-4
G1-3
Default Value
0
0
bit 2
G1-2
0
default Value 0x00
bit 1
bit 0
G1-1
G1-0
0
0
Sub Address 0x03
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 AK8817 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.
Rev.000E
37
2007 / 03