FS401LF ETC2 [List of Unclassifed Manufacturers], FS401LF Datasheet - Page 6

• Manufacturer Part Number: FS401LF
• Description: PC to TV Video Scan Converters
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

FS401, FS403
1.2 Frame Store Memory Controller
Inserted between the capture and the encoder engines the frame store has two functions: 1) to act as a reservoir
of pixels to match the incoming frame rate to the outgoing field or frame rate; 2) to support vertical scaling by
allowing lines to be written into the frame store intermittently, but read out at a constant rate.
Frame store clock, FS_CK is derived from the OSC1 clock by a second phase locked loop.
1.3 Video Encoder Engine
Pixels are retrieved from the external frame store memory asynchronously relative to the incoming frames.
Outgoing video timing is set to the selected TV (NTSC or PAL) or progressive scan standard.
Incoming data sampling is normally set to fill complete lines in the Frame Store Memory. Horizontal scaling is
applied to pixels exiting the Frame Store. Pixels may be routed through either a digital video encoder or a YC
to-RGB transformation matrix. Either output is connected to a triple 10-bit D/A converter to generate the video
output that may be Composite Video and Y/C, RGB or YUV.
Encoder Engine timing is derived from many clock sources. These standards are shown below.
Encoder Standard
NTSC
PAL
RGB NTSC
RGB PAL
Super RGB NTSC
Super RGB PAL
VGA
SVGA
Progressive NTSC
100Hz PAL
1.4 Serial Control Port
FS400 setup is programmed by 39 16-bit registers that are accessible via the I
Status and Revision ID can also be read from the registers.
‡
Philips I
JANUARY 24, 2007
Note: I
2
2
C bus.
C is a registered trademark of Philips Corporation. The FS400 SIO bus is similar but not identical to
Total Pixels
910
1135.0064
910
1135
1280
1280
800
1024
910
1135
Total Lines
525
625
525
625
525
625
525
625
525
625
COPYRIGHT © 1999, 2000, 2003 FOCUS ENHANCEMENTS, INC.
6
Vertical
Mode
60I
50I
60I
50I
60I
50I
60P
60P
60P
100I
Clock Rate
14.318 MHz
17.734 MHz
14.318 MHz
17.734 MHz
20.140 MHz
20.000 MHz
25.175 MHz
38.400 MHz
28.636 MHz
35.468 MHz
2
C
‡
compatible serial port (SIO).
PRODUCT SPECIFICATION
Line Freq.
15.73 KHz
15.62 KHz
15.73 KHz
15.62 KHz
15.73 KHz
15.62 KHz
31.5 KHz
37.5 KHz
31.5 KHz
31.25 KHz
REV. NO. 1.7
R
C
B
-