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參數(shù)資料
| 型號： | SAA6721 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | SXGA RGB to TFT graphics engine |
| 中文描述： | SXGA RGB到液晶圖形引擎 |
| 文件頁數(shù)： | 21/72頁 |
| 文件大小： | 360K |
| 代理商： | SAA6721 |
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1999 May 11
21
Philips Semiconductors
Preliminary specification
SXGA RGB to TFT graphics engine
SAA6721E
7.9.2
D
OWNSCALING
The downscaling engine is used for reducing the incoming
RGB data stream, i.e. for displaying high resolution input
frames on panels with a smaller resolution. The scaling
ratio can be programmed independently for both horizontal
and vertical downscaling units. The algorithm uses pixel
accumulation, achieving a minimum scaling factor of
1
64
.
8
SYSTEM DESCRIPTION
8.1
Programming registers
The SAA6721E is a highly integrated device with many
features. To get the desired functionality and performance
it must be programmed correctly. In general, before
programming, the device must be switched to the internal
reset state to prevent unwanted functions while changing
the registers.
After writing to all registers the internal reset can be
released. There are some registers (mainly offset
counters) that can be changed during data processing
without an internal reset. All accesses to the on screen
display can be done during data processing.
Table 6
I
2
C-bus device address
Bit SAD = 0 the address is 74H, while bit SAD = 1 the
address is 76H.
Table 7 shows the programming model.
MSB
LSB
0
1
1
1
0
1
SAD
R/W
Table 7
Programming register overview
ADDRESS R/W
D7
D6
D5
D4
D3
D2
D1
D0
State
0
1
2
3
R
R
reserved
reserved
R/W iic_test_register[7 to 0]
R
intr
RGB mode detection
4
R
pos_
vsync
pos_
hsync
no_
vsync
no_
hsync
5
6
7
8
R
R
R
R
v_lines[7 to 0]
v_lines[10 to 8]
h_clocks[7 to 0]
h_clocks[11 to 8]
RGB auto-adjustment
9
10
11
12
13
14
15
16
17
18
W
W
W
W
W
R
R
R
R
R
ref_line[7 to 0]
ref_line[10 to 8]
ref_pixel[7 to 0]
ref_pixel[11 to 8]
ref_colour[7 to 0]
ref_pixel_red[7 to 0]
ref_pixel_green[7 to 0]
ref_pixel_blue[7 to 0]
black_lines[7 to 0]
black_pixels[7 to 0]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA6721E | SXGA RGB to TFT graphics engine(XGA RGB 到 TFT圖形引擎) |
| SAA6750 | Encoder for MPEG2 image recording EMPIRE |
| SAA6750H | Encoder for MPEG2 image recording EMPIRE |
| SAA6752HS | MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| SAA7102 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:12; Connector Shell Size:28; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA6721E | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SXGA RGB to TFT graphics engine |
| SAA6750 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Encoder for MPEG2 image recording EMPIRE |
| SAA6750H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Encoder for MPEG2 image recording EMPIRE |
| SAA6752HS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
| SAA6752HS/V103 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer |
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