cx25840 Conexant Systems, Inc., cx25840 Datasheet - Page 233

• Manufacturer Part Number: cx25840
• Description: Video Decoder And Broadcast Audio
• Manufacturer: Conexant Systems, Inc.

CX25840/1/2/3 Data Sheet
5.6.4
0x486—Test Register (DEFAULT 0x00)
Manufacturing Test
102284B
8/3/05
Temporal Decimation
[7:6]
[5:0]
Miscellaneous Timing Control
[7]
[6:4]
[3]
[2]
[1]
[0]
Bits
Bits
RZ
RW
RW
RZ
RW
RW
RW
RZ
Type
Type
Advanced Diagnostic Registers
0
0
0
00
0x00
000
0
00
Default
Default
Registers addresses, 0x484 to 0x4AF, are intended for engineering diagnostics and
performance fine tuning only. In general, it is not intended that the user should need to
access these registers.
VPRES_VERT_EN
RESERVED
HR32
TDALGN
TDFIELD
RESERVED
RESERVED
TEMPDEC
Name
Name
Conexant
Enable for the vertical portion of the video present logic.
1 = VPRES status bit reflects when the video is both locked
vertically and horizontally.
0 = VPRES reflects the horizontal locking only.
This bit controls the width of the HRESET output.
0 = HRESET is 64 clocks wide
1 = HRESET is 32 clocks wide
Aligns start of decimation with even or odd field.
0 = Start on odd field
1 = Start on even field
This signal is an indication of whether the temporal
decimation is done on a frame (0) or field (1) basis.
This signal is the control for the temporal decimation logic.
This value is the number of fields or frames to discard out of
50 (625/50) or 60 (525/60). This value should not exceed
60 for a 60 Hz system or 50 for a 50 Hz system.
Description
Description
Address 0x485
Address 0x484
Register Map
5-91