2004 Mar 01
48
Philips Semiconductors
Product specification
Digital video encoder
SAA7102; SAA7103
Table 61 Subaddress 62H
Table 62 Subaddresses 63H to 66H (four bytes to program subcarrier frequency)
Note
1. Examples:
a) NTSC M: f
fsc
= 227.5, f
llc
= 1716
→
FSC = 569408543 (21F07C1FH).
b) PAL B/G: f
fsc
= 283.7516, f
llc
= 1728
→
FSC = 705268427 (2A098ACBH).
Table 63 Subaddresses 67H to 6AH
Table 64 Subaddresses 6CH and 6DH
DATA BYTE
DESCRIPTION
CONDITIONS
REMARKS
BSTA
amplitude of colour burst;
input representation in
accordance with
“ITU-R BT.601”
white-to-black = 92.5 IRE;
burst = 40 IRE; NTSC encoding
recommended value:
BSTA = 63 (3FH)
BSTA = 0 to 2.02
×
nominal
white-to-black = 92.5 IRE;
burst = 40 IRE; PAL encoding
recommended value:
BSTA = 45 (2DH)
BSTA = 0 to 2.82
×
nominal
white-to-black = 100 IRE;
burst = 43 IRE; NTSC encoding
recommended value:
BSTA = 67 (43H)
BSTA = 0 to 1.90
×
nominal
white-to-black = 100 IRE;
burst = 43 IRE; PAL encoding
recommended value:
BSTA = 47 (2FH); default after
reset
BSTA = 0 to 3.02
×
nominal
DATA BYTE
DESCRIPTION
CONDITIONS
REMARKS
FSC0 to FSC3
f
fsc
= subcarrier frequency
(in multiples of line
frequency); f
llc
= clock
frequency (in multiples of
line frequency)
; note 1
FSC3 = most significant byte;
FSC0 = least significant byte
DATA BYTE
DESCRIPTION
REMARKS
L21O0
first byte of captioning data, odd field
LSBs of the respective bytes are encoded
immediately after run-in and framing code, the
MSBs of the respective bytes have to carry the
parity bit, in accordance with the definition of
line 21 encoding format.
L21O1
second byte of captioning data, odd field
L21E0
first byte of extended data, even field
L21E1
second byte of extended data, even field
DATA BYTE
DESCRIPTION
HTRIG
sets the horizontal trigger phase related to chip-internal horizontal input
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed; increasing HTRIG decreases
delays of all internally generated timing signals; the default value is 0
FSC
round
f
fsc
f
llc
--------
2
32
×
=