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參數(shù)資料
| 型號： | SDA9255 |
| 廠商： | SIEMENS AG |
| 英文描述： | SRC-Scan Rate Converter SDA9255 |
| 中文描述： | 鋼骨混凝土掃描頻率轉(zhuǎn)換器SDA9255 |
| 文件頁數(shù)： | 16/45頁 |
| 文件大?。?/td> | 225K |
| 代理商： | SDA9255 |
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SDA 9255
Semiconductor Group
14
1998-02-01
2.4
The SDA 9255 has six output signals:
Output Timing and Parameter
There are different modes of output synchronization raster possible. The data output
signal of the SDA 9255 (YOUT, UVOUT and HREF) are fed to the digital-to-analog
converter. The timing of the output signals is given in figure 8 (
see chapter 5.2, Output
Timing of the SDA 9255
).
2.4.1
The register values NALOP and NAPOP are used to set the position of the active output
field on the screen. To do this the register value to align the not active lines (NALOP,
subaddress 0D
H
,
see description of
I
2
C Bus
) and the register value to align the not
active pixels (NAPOP, subaddress 0E
H
,
see description of
I
2
C Bus
) for the output
signal are available.
To change the vertical position of the picture on the screen the NALOP register can be
utilized. The NALOP register (not active lines for output) is used to adjust the number of
not active output lines in steps of two lines in case of 100/120 Hz interlaced and in steps
of four lines in case of 50/60 Hz proscan. To calculate the first active output line the
following formula can be used:
for MODE10050 = 0 ==> 100/120 Hz interlaced:
FAOPL = NALOP
*
2 + 3
for MODE10050 = 1 ==> 50/60 Hz proscan:
FAOPL = NALOP
*
4 + 5
where
FAOPL:
The first active output line
NAL_OP:
Register value
The maximum value for the first active line is 65 for 100/120 Hz and 129 for 50/60 Hz.
In figure 11 (
see chapter 5.5, Example for Not Active Output Register
) an example
for the setting of the NALOP register is shown. The synchronization output (HOUT,
Number of Not Active Lines of Output Field
HOUT
Pin 60
Horizontal synchronization signal - high
active
Vertical synchronization signal - high active
Horizontal active video output
Interlace signal
VOUT
HREF
INTERLACED Pin 59
YOUT0 ... 7
UVOUT4 ... 7
Pin 61
Pin 62
Pin 7, 6, 5, 4, 3, 1, 64, 63 Luminance output
Pin 13, 12, 11, 10
Chrominance output
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