SAA7118 Datasheet, PDF (64/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Table 19 SAV/EAV codes on I-port
EVENT DESCRIPTION
SAV/EAV CODES ON I-PORT⁽¹⁾ (HEX)
MSB⁽²⁾ OF SAV/EAV BYTE = 0
MSB⁽²⁾ OF SAV/EAV BYTE = 1
Next pixel is FIRST pixel of any active
line
Previous pixel was LAST pixel of any
active line, but not the last
Next pixel is FIRST pixel of any
V-blanking line
Previous pixel was LAST pixel of the
last active line or of any V-blanking line
No valid data, don’t capture and don’t
increment pointer
FIELD ID = 0
0E
13
25
38
FIELD ID = 1
49
FIELD ID = 0
80
54
9D
62
AB
7F
B6
00
FIELD ID = 1
C7
DA
EC
F1
Notes
1. The leading byte sequence is: FFH-00H-00H.
2. The MSB of the SAV/EAV code byte is controlled by:
a) Scaler output data: task A ⇒ MSB = CONLH[90H[7]]; task B ⇒ MSB = CONLH[C0H[7]].
b) VBI-data slicer output data: DID[5:0] 5DH[5:0] = 3EH ⇒ MSB = 1; DID[5:0] 5DH[5:0] = 3FH ⇒ MSB = 0.
COMMENT
HREF = active;
VREF = active
HREF = inactive;
VREF = active
HREF = active;
VREF = inactive
HREF = inactive;
VREF = inactive
IDQ pin inactive
invalid data
or
end of raw VBI line
timing reference code internal header
sliced data
and filling data
timing reference code invalid data
...
00 00 FF 00 00 SAV SDID DC IDI1 IDI2 D_{1_3} D_{1_4} D_{2_1}
... D_{DC_3} D_{DC_4} CS BC FF 00 00 EAV 00 00 ...
... FF 00 00 EAV
ANC header
D_{1_1} D_{1_2}
internal header
sliced data
ANC data output is only filled up
to the Dword boundary
MHB549
00 FF FF DID SDID DC IDI1 IDI2 D_{1_3} D_{1_4} ... D_{DC_3} D_{DC_4} CS BC 00 00 ...
ANC header active for DID (subaddress 5DH) <3EH
Fig.37 Sliced data formats on the I-port in 8-bit mode.