cx25840 Conexant Systems, Inc., cx25840 Datasheet - Page 202

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

Register Map
5-60
[7]
[6]
[5]
[4]
[3]
[2]
[1]
General Status 2
[0]
Interrupt Status 1
[7]
[6]
[5]
[4]
[3]
[2]
[1]
[0]
Bits
Bits
RZ
RO
RO
RO
RO
RO
RO
RO
RR
RR
RR
RR
RR
RR
RR
RR
Type
Type
0
0
0
0
0
0
0
0
Default
0
0
0
0
0
0
0
0
Default
END_VBI_ODD_STAT
FMT_CHANGE_STAT
VSYNC_TRAIL_STAT
HLOCK_CHANGE_STAT
VLOCK_CHANGE_STAT
CSC_LOCK_CHANGE_STAT
SRC_FIFO_UFLOW_STAT
SRC_FIFO_OFLOW_STAT
RESERVED
SPECIAL_PLAY_N
VPRES
AGC_LOCK
CSC_LOCK
VLOCK
SRC_LOCK
HLOCK
Name
Name
Conexant
Active-low special play mode (fast forward, rewind, pulse, or slow
motion). This is used to disable certain algorithms when not in a
normal play mode. Special play mode is assumed wen the
detected VSYNC falls outside of a narrow 2-line expected window.
Active-high video present. Indication of the presence of a
reasonable video signal, one that we can lock onto horizontally or
both horizontally and vertically. If VPRES_VERT_EN = 0, then
VPRES is dependent upon the location of the last 32 HSYNC
pulses relative to their expected location. If VPRES_VERT_EN = 1,
then VPRES is dependent upon both the location of the last 16
VSYNC pulses and the last 32 HSYNC pulses relative to their
expected locations.
VGA lock status
Color Subcarrier lock status
Vertical lock status
Sample Rate Converter lock Status
Horizontal lock status
The end of the VBI region of an odd field sets this bit.
A change in the detected video format sets this bit.
The falling edge of the detected VSYNC sets this bit.
A change in the horizontal lock status sets this bit.
A change in the vertical lock status sets this bit.
A change in the Color Subcarrier Lock status sets this bit.
The detection of a SRC FIFO Underflow sets this bit.
The detection of a SRC FIFO Overflow sets this bit.
Description
Description
CX25840/1/2/3 Data Sheet
Address 0x410
Address 0x40E
102284B
8/3/05