BT848 ETC, BT848 Datasheet - Page 113

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

Bt848/848A/849A
Single-Chip Video Capture for PCI
Output Format Register
Memory Mapped Location 0x048 – (OFORM)
Upon reset it is initialized to 0x00. OFORM(0) is the least significant bit.
Brooktree
Bits
[6:5]
[4:0]
[7]
Type
®
RW
RW
RW
Default
0
00
00000
Name
RANGE
CORE
Reserved
L848A_A
Description
Luma Output Range: This bit determines the range for the lumi-
nance output on the Bt848. The range must be limited when using
the control codes as video timing.
Luma Coring: These bits control the coring value used by the
Bt848. When coring is active and the total luminance level is below
the limit programmed into these bits, the luminance signal is trun-
cated to zero.
These bits must be set to zero.
0
1
00
01
10
11
= Normal operation (Luma range 16–253,
= Full-range Output (Luma range 0–255,
= 0 no coring
= 8
= 16
= 32
chroma range 2–253).
Y=16 is black (pedestal).
Cr, Cb=128 is zero color information.
chroma range 2–253)
Y=0 is black (pedestal).
Cr, Cb=128 is zero color information.
C
ONTROL
R
Output Format Register
EGISTER
D
EFINITIONS
103