參數(shù)資料
型號: FS451
廠商: Electronic Theatre Controls, Inc.
英文描述: i-Net TV Interface Video Processor
中文描述: 一至網(wǎng)絡(luò)電視接口視頻處理器
文件頁數(shù): 27/60頁
文件大?。?/td> 266K
代理商: FS451
FS450, FS451
PRELIMINARY PRODUCT DESCRIPTION
JUNE, 2000, VERSION 1.2
27
COPYRIGHT
ó
1999,2000 FOCUS ENHANCEMENTS, INC.
PRELIMINARY INFORMATION
6.2.9 NCOD - Denominator of NCO Word
Denominator of NCO Word (14)
7
6
5
4
3
2
1
0
NCOD
7
NCOD
6
NCOD
5
NCOD
4
NCOD
3
NCOD
2
NCOD
1
NCOD
0
Denominator of NCO Word (15)
7
6
5
4
3
2
1
0
NCOD
15
NCOD
14
NCOD
13
NCOD
12
NCOD
11
NCOD
10
NCOD
9
NCOD
8
Denominator of NCO Word (16)
7
6
5
4
3
2
1
0
NCOD
23
NCOD
22
NCOD
21
NCOD
20
NCOD
19
NCOD
18
NCOD
17
NCOD
16
Denominator of NCO Word (17)
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
Reg
Bit#
Bit Name
Description
16, 15, 14
7-0,7-0,7-0
NCOD
23-0
Denominator of NCO Word [23:0].
Denominator of clock
synthesizer to generate VGA input clock. NCOD is a 24 bit
unsigned number.
Range:
{NCON*2 : (2
24
-1)}
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.
Frequency VGA / Frequency 656 = # VGA Pixels / # 656 Pixels x # VGA Lines / # 656 Lines
Frequency VGA / Frequency 656 = NCON / NCOD x M / N
Example: for SVGA mode, typ. total pixels x lines ~ 1024 x 625; let M=512, N=128:
NTSC: NCOD = 858 x 525 x 512 / 128 = 1,801,800
PAL: NCOD = 864 x 625 x 512 / 128 = 2,160,000
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