TW9920 Datasheet, PDF (41/88 Pages) List of Unclassifed Manufacturers – Analog Video Decoder / Encoder

TW9920
0x00 – Product ID Code Register (ID)
Bit Function R/W
Description
7-3 ID
R ^{The TW9920 Product ID code is 00111.}
2-0 Revision
R ^{The revision number.}
Reset
7
2
0x01 – Chip Status Register I (STATUS1)
Bit Function R/W
Description
Reset
7 VDLOSS
6 HLOCK
5 SLOCK
4 FIELD
3 VLOCK
2
R ^{1 = Video not present. (sync is not detected in number of} 0
consecutive line periods specified by Misscnt register)
0 = Video detected.
R ^{1 = Horizontal sync PLL is locked to the incoming video source.}
0
0 = Horizontal sync PLL is not locked.
R ^{1 = Sub-carrier PLL is locked to the incoming video source.}
0
0 = Sub-carrier PLL is not locked.
R ^{0 = Odd field is being decoded.}
0
1 = Even field is being decoded.
R ^{1 = Vertical logic is locked to the incoming video source.}
0
0 = Vertical logic is not locked.
Reserved
0
1 MONO
0 DET50
R ^{1 = No color burst signal detected.}
0
0 = Color burst signal detected.
R ^{0 = 60Hz source detected}
0
1 = 50Hz source detected
The actual vertical scanning frequency depends on the current
standard invoked.
TECHWELL, INC.
41
REV. D
08/29/2005