FS450 ETC2 [List of Unclassifed Manufacturers], FS450 Datasheet - Page 26

• Manufacturer Part Number: FS450
• Description: i-Net TV Interface Video Processor
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

FS450, FS451
6.2.8 NCON - Numerator of NCO Word
Numerator of NCO Word (10)
Numerator of NCO Word (11)
Numerator of NCO Word (12)
Numerator of NCO Word (13)
Reg
12, 11, 10
Range: {0 : NCOD/2}
The FS450 synthesizes a 27-85 MHz clock from the 27 MHz TV_CKIN and supplies this clock
(VGA_CKOUT) to the GCC. This clock is buffered and returned to the FS450 (VGA_CKIN) synchronous to
the RGB data and Sync information. This clock has a 1.5 Hz resolution and can be adjusted so the VGA
scaled input data rate exactly matches the CCIR 656 data output rate.
Example: for SVGA mode, typ. total pixels x lines ~ 1024 x 625; let M=512, N=128:
JUNE, 2000, VERSION 1.2
NCON
NCON
NCON
NTSC and PAL: NCON = 1024 x 625 = 640,000
7
7
7
7
0
Frequency VGA / Frequency 656 = # VGA Pixels / # 656 Pixels x # VGA Lines / # 656 Lines
15
23
7
Bit#
7-0,7-0,7-0
NCON
NCON
NCON
6
6
6
6
0
14
22
6
Frequency VGA / Frequency 656 = NCON / NCOD x M / N
Bit Name
NCON
NCON
NCON
NCON
5
5
5
5
0
23-0
13
21
5
Description
Numerator of NCO Word [23:0]. Numerator of clock synthesizer
to generate VGA input clock. NCON is a 24 bit unsigned number.
NCON
NCON
NCON
4
4
4
4
0
12
20
4
26
NCON
NCON
NCON
COPYRIGHT
3
3
3
3
0
11
19
3
NCON
NCON
NCON
1999, 2000 FOCUS ENHANCEMENTS, INC.
PRELIMINARY PRODUCT DESCRIPTION
2
2
2
2
0
10
18
2
PRELIMINARY INFORM ATION
NCON
NCON
NCON
1
1
1
1
0
17
1
9
NCON
NCON
NCON
0
0
0
0
0
16
0
8