BT848 ETC, BT848 Datasheet - Page 102

• Manufacturer Part Number: BT848
• Description: Single-Chip Video Capture for PCI
• Manufacturer: ETC

C
Input Format Register
Input Format Register
Memory Mapped Location 0x004 – (IFORM)
Upon reset it is initialized to 0x58. FORMAT(0) is the least significant bit.
92
Bits
ONTROL
[6:5]
[4:3]
[2:0]
[7]
R
EGISTER
Type
RW
RW
RW
RW
D
Default
0
10
11
000
EFINITIONS
Name
Reserved
MUXSEL
MUXSEL
XTSEL
FORMAT
FORMAT
Description
This bit must be set to zero.
Used for software control of video input selection. The Bt848 can
select between three composite video sources, or two composite
and one S-video source.
If automatic format detection is required, logical 11 must be
loaded. Logical 01 and 10 are used if software format selection is
desired.
Automatic format detection may be enabled or disabled. The
NUML bit is used to determine the input format when automatic
format detection is enabled.
00
01
10
11
00
00
01
10
11
000 = Auto format detect enabled
001 = NTSC (M) input format
010 = NTSC w/o pedestal (Japan)
011 = PAL (B, D, G, H, I) input format
100 = PAL (M) input format
101 = PAL (N) input format
110 = SECAM input format
111 = Reserved
111 = PAL (N-combination) input format
L848A_A
= Reserved
= Select MUX2 input to MUXOUT
= Select MUX0 input to MUXOUT
= Select MUX1 input to MUXOUT
= Select MUX3 input to MUXOUT
= Reserved
= Select XT0 input (only XT0 present)
= Select XT1 input (both XTs present)
= Auto XT select enabled (both XTs present)
Single-Chip Video Capture for PCI
Bt848/848A/849A
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