
1996 Jul 08
21
Philips Semiconductors
Preliminary specification
Digital Video Encoder (DENC2)
SAA7185
Table 28
Logic levels and function of PHRES
Table 29
Subaddress 71 to 73
Table 30
Subaddress 77 to 79
Table 31
Subaddress 7A to 7D
S
UBADDRESSES
In subaddresses 5B, 5C, 5D, 5E and 62 all IRE values are rounded up.
DATA BYTE
FUNCTION
PHRES1
PHRES0
0
0
1
1
0
1
0
1
no reset
reset every two lines
reset every eight fields
reset every four fields
DATA BYTE
DESCRIPTION
BMRQ
beginning of MP ReQuest signal (RCM2)
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed
first active pixel at analog outputs (corresponding input pixel coinciding with RCM2) at
BMRQ = 0F9H (115H)
end of MP ReQuest signal (RCM2)
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed
last active pixel at analog outputs (corresponding input pixel coinciding with RCM2) at
EMRQ = 686H (690H)
EMRQ
DATA BYTE
DESCRIPTION
BRCV
beginning of output signal on RCV2 pin
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed
first active pixel at analog outputs (corresponding input pixel coinciding with RCV2) at
BRCV = 0F9H (115H)
end of output signal on RCV2 pin
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed
last active pixel at analog outputs (corresponding input pixel coinciding with RCV2) at
ERCV = 686H (690H)
ERCV
DATA BYTE
DESCRIPTION
FLEN
Length of a Field = FLEN + 1, measured in half lines
valid range is limited to 524 to 1022 (FISE = 1) respectively 624 to 1022 (FISE = 0),
FLEN should be even
First Active Line after vertical blanking interval = FAL + 1, measured in lines
FAL = 0 coincides with the first field synchronization pulse
Last Active Line before vertical blanking interval = LAL + 1, measured in lines
LAL = 0 coincides with the first field synchronization pulse
FAL
LAL