bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 103

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

Bt829B
VideoStream II Decoders
0x11—White Crush Up Count Register (WC_UP)
This control register may be written to or read by the MPU at any time. Upon reset, it is initialized to 0xCF.
UPCNT(0) is the LSB.
MAJS
UPCNT
7
1
MAJS
These bits determine the majority comparison point for the White Crush Up function.
The value programmed in these bits accumulates once per field or frame when the majority of
the pixels in the active region of the image are below a selected value. The accumulated value
determines the extent to which the AGC value needs to be raised. This keeps the SYNC level
proportionate with the white level. The UPCNT value is assumed positive:
6
1
5
0
00
01
10
11* =
3F
3E
:
.
00
=
=
=
=
=
:
.
=
3/4 of maximum luma value
1/2 of maximum luma value
1/4 of maximum luma value
Automatic
63
62
:
.
0
4
0
D829BDSA
3
1
UPCNT
0x11—White Crush Up Count Register (WC_UP)
2
1
4.0 Control Register Definitions
1
1
0
1
93