bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 92

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

82
4.0 Control Register Definitions
0x01—Input Format Register (IFORM)
LOF
COF
0x01—Input Format Register (IFORM)
The MPU may read or write to this control register at any time. Upon reset, it is initialized to 0x58.
FORMAT(0) is the LSB. An asterisk indicates the default option.
HACTIVE
MUXSEL
XTSEL
FORMAT
HACTIVE
7
0
Luma ADC Overflow—On power-up, this bit is set to 0. If an ADC overflow occurs, the bit is
set to a logical 1. It is reset after being written to, or when a chip reset occurs. When the ADC
is in power-down mode (Y_SLEEP = 1) the state of this bit is not valid and should be ignored.
When the luma A/D is in sleep mode, LOF is set to 1.
Chroma ADC Overflow—On power-up, this bit is set to 0. If an ADC overflow occurs, the bit
is set to a logical 1. It is reset after being written to, or when a chip reset occurs. When the
ADC is in power-down mode (C_SLEEP = 1), the state of this bit is not valid and should be
ignored. When the chroma A/D is in sleep mode, COF is set to 1.
When using the Bt829A with a packed memory architecture, for example, with field memo-
ries, this bit should be programmed with a logical 1. When implementing a VRAM based
architecture, this bit should be programmed with a logical 0.
This bit is used for software control of video input selection. The Bt829A can select between
four composite video sources, or three 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.
6
1
MUXSEL
5
0
0*
1
00
01
10* =
11
00
01
10
11* =
000* =
001 =
010 =
011 =
100 =
101 =
110 =
111 =
=
=
=
=
=
=
=
=
Reset HACTIVE with HRESET
Extend HACTIVE beyond HRESET
Select MUX3 input to MUXOUT
Select MUX2 input to MUXOUT
Select MUX0 input to MUXOUT
Select MUX1 input to MUXOUT
Reserved
Select XT0 input (only XT0 present)
Select XT1 input (both XTs present)
Auto XT select enabled (both XTs present)
Auto format detect enabled
NTSC (M) input format
NTSC with no pedestal format
PAL (B, D, G, H, I) input format
PAL (M) input format
PAL (N) input format
SECAM input format
PAL (N combination) input format
4
1
D829BDSA
XTSEL
3
1
2
0
VideoStream II Decoders
FORMAT
1
0
Bt829B
0
0