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2004 Jan 26 42
Philips Semiconductors Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
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Table 17 I
2
C-bus video front-end input interface static settings
ADR
HEX
M
COMMAND
NAME
R/W SIZE/POSITION PARAMETER/RANGE DEFAULT DESCRIPTION
40 I 625/525 R/W 1 byte 625 defines the input signal either as 625 lines
or 525 lines
bit[1:0] = 00 625
bit[1:0] = 01 525
41 I subsampling type R/W 1 byte D1 specifies the subsampling type; remark: if
the subsampling type is changed, then the
horizontal shift (address 45H) will be
overwritten with the default values and the
horizontal filter (addresses 53H, 54H and
55H) will be initialized with appropriate
parameter
bit[1:0] = 00 D1
bit[1:0] = 01
2
/
3
D1
bit[1:0] = 10
1
/
2
D1
bit[1:0] = 11 SIF
42 I video sync format R/W 1 byte 0 defines the incoming video sync sources
bit[1:0] = 00 H-sync, V-sync and Field
Identification (FID)
information coded in the
EAV/SAV bytes complying
to ITU-R BT.656
bit[1:0] = 01 separate H-sync, V-sync
and FID signals input to
from external source(s)
bit[1:0] = 10 separate H-sync and
V-sync signals input to
from external source(s)
43 I video clock select R/W 1 byte video clock 1 defines which external video input clock is
used
bit 0 = 0 video clock 1
bit 0 = 1 video clock 2
44 I vertical sync
timing adjustment
R/W 2 bytes 0, 0 Remark: If a vertical sync timing
adjustment different from ‘0’ is used, then
a horizontal shift of minimum 2 pixels must
be programmed in subaddress 45H.
byte 0 0 to 225 defines the number of shifted lines in the
top field
byte 1 0 to 225 defines the number of shifted lines in the
bottom field