
2004 Jun 29
26
Philips Semiconductors
Product specification
HD-CODEC
SAA7108AE; SAA7109AE
Table 6
Example for set-up of the sync tables
SEQUENCE
COMMENT
Write to subaddress D0H
00
05 20
points to first entry of line count array (index 0)
generate 5 lines of line type index 2 (remember, it is the second entry of the line type
array); will be the first vertical raster pulse
generate 1 line of line type index 4; will be sync-black-sync-black sequence after the first
vertical pulse
generate 14 lines of line type index 6; will be the following lines with sync-black sequence
generate 540 lines of line type index 1; will be lines with sync and active video
generate 2 lines of line type index 6; will be the following lines with sync-black sequence
generate 1 line of line type index 5; will be the following line (line 563) with
sync-black-sync-black-null sequence (null is equivalent to sync tip)
generate 4 lines of line type index 2; will be the second vertical raster pulse
generate 1 line of line type index 3; will be the following line with sync-null-sync-black
sequence
generate 15 lines of line type index 6; will be the following lines with sync-black sequence
generate 540 lines of line type index 1; will be lines with sync and active video
generate 2 lines of line type index 6; will be the following lines with sync-black sequence;
now, 1125 lines are defined
01 40
0E 60
1C 12
02 60
01 50
04 20
01 30
0F 60
1C 12
02 60
Write to subaddress D2H (insertion is done into all three analog output signals)
00
6F 33 2B 30 00 00 00 00
6F 43 2B 30 00 00 00 00
3B 30 BF 03 BF 03 2B 30 60
×
value(3) + 960
×
value(0) + 960
×
value(0) + 44
×
value(3)
2B 10 2B 20 57 30 00 00
44
×
value(1) + 44
×
value(2) + 88
×
value(3)
3B 30 BF 33 BF 33 2B 30 60
×
value(3) + 960
×
value(3) + 960
×
value(3) + 44
×
value(3)
points to first entry of line pattern array (index 1)
880
×
value(3) + 44
×
value(3); (subtract 1 from real duration)
880
×
value(4) + 44
×
value(3)
Write to subaddress D1H
00
34 00 00 00
24 24 00 00
24 14 00 00
14 14 00 00
14 24 00 00
54 00 00 00
points to first entry of line type array (index 1)
use pattern entries 4 and 3 in this sequence (for sync and active video)
use pattern entries 4, 2, 4 and 2 in this sequence (for 2
×
sync-black-null-black)
use pattern entries 4, 2, 4 and 1 in this sequence (for sync-black-null-black-null)
use pattern entries 4, 1, 4 and 1 in this sequence (for sync-black-sync-black)
use pattern entries 4, 1, 4 and 2 in this sequence (for sync-black-sync-black-null)
use pattern entries 4 and 5 in this sequence (for sync-black)