- 您现在的位置：买卖IC网 > PDF目录10965 > CS4955-CQZ (Cirrus Logic Inc)IC VID ENCODER NTSC/PAL 48-TQFP PDF资料下载
参数资料
| 型号： | CS4955-CQZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 5/60页 |
| 文件大小： | 0K |
| 描述： | IC VID ENCODER NTSC/PAL 48-TQFP |
| 标准包装： | 250 |
| 类型： | 视频编码器 |
| 电压 - 电源，模拟： | 3.15 V ~ 5.25 V |
| 电压 - 电源，数字： | 3.15 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-TQFP（7x7） |
| 包装： | 管件 |
第1页第2页第3页第4页当前第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页
CS4954 CS4955
DS278F6
13
able gain amplifiers in which the chroma amplitude
can be varied via the U_AMP and V_AMP 8-bit
host addressable registers.
The U and V chroma signals are fed to a quadrature
modulator in which they are combined with the
output from the subcarrier synthesizer to produce
the proper modulated chrominance signal.
The chroma is then interpolated by a factor of two
in order to operate the output DACs at twice the
pixel rate. The interpolation filters enable running
the DACs at twice the pixel rate which helps reduce
the sinx/x roll-off for higher frequencies and reduc-
es the complexity of the external analog low pass
filters.
4.5
Luma Path
Along with the chroma output path, the CS4954/5
Video Input Formatter has a parallel luma data out-
put to a digital delay line. The delay line is a digital
FIFO. The FIFO depth matches the clock period
delay associated with the more complex chroma
path. Brightness adjustment is also provided via the
8-bit BRIGHTNESS_OFFSET Register.
Following the luma delay, the data is passed
through an interpolation filter that has a program-
mable bandwidth, followed by a variable gain am-
plifier. The amplifier DC luma gain can be changed
using the the Y_AMP Register.
The output of the luma amplifier connects to the
sync insertion block. Sync insertion is accom-
plished by multiplexing, into the luma data path,
the different sync DC values at the appropriate
times. The digital sync generator takes horizontal
sync and vertical sync timing signals and generates
the appropriate composite sync timing (including
vertical equalization and serration pulses), blank-
ing information, and burst flag. The sync edge rates
conform to RS-170A or ITU R.BT601 and ITU
R.BT470 specifications.
It is also possible to delay the luminance signal,
with respect to the chrominance signal, by up to
three pixel clocks. This variable delay is useful to
offset different propagation delays of the luma
baseband and modulated chroma signals. This ad-
justable luma delay is available only on the
CVBS_1 output.
4.6
RGB Path and Component YUV Path
The RGB datapath has the same latency as the luma
and chroma path. Therefore all six simultaneous
analog outputs are synchronized. The 4:2:2 YCbCr
data is first interpolated to 4:4:4 and then interpo-
lated to 27 MHz. The color space conversion is per-
formed at 27 MHz. The coefficients for the color
space conversion conform to the ITU R.BT601
specifications.
After color space conversion, the amplitude of each
component can be independently adjusted via the
R_AMP, G_AMP, and B_AMP 8-bit host address-
able registers. A synchronization signal can be add-
ed to either one, two or all of the RGB signals. The
synchronization signal conforms to NTSC or PAL
specifications.
Some applications (e.g., projection TVs) require
analog component YUV signals. The chip provides
a programmable mode that outputs component
YUV data. Sync can be added to the luminance sig-
nal. Independent gain adjustment of the three com-
ponents is provided as well.
4.7
Digital to Analog Converters
The CS4954/5 provides six discrete 27 MHz DACs
for analog video. The default configuration is one
10-bit DAC for S-video chrominance, one 10-bit
DAC for S-Video luminance, one 10-bit DAC for
composite output, and three 10-bit DACs for RGB
outputs. All six DACs are designed for driving ei-
ther low-impedance loads (double terminated
75
Ω) or high-impedance loads (double terminated
300
Ω). There are five different DAC configura-
tions to choose from (see Table 1, below).
The DACs can be put into high-impedance mode
via host-addressable control register bits. Each of
相关PDF资料 |
PDF描述 |
|---|---|
| MC68908GR16MFJE | IC MCU 8BIT 16K FLASH 32-LQFP |
| MCF51QE128CLH | IC MCU 32BIT 128K FLASH 64-LQFP |
| MC908KX8VDWE | IC MCU 8K FLASH 4/8MHZ 16-SOICW |
| LF13WBP-11P | CONN PLUG WATERPROOF 11POS MALE |
| MC908LJ12CPBER | IC MCU 12K FLASH 4/8MHZ 64-LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CS4955-CQZR | 功能描述:视频 IC IC NTSC/PAL Digital Video Encoder RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| CS496102 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:New Audio System Processors are Ideal for Digital Audio Networking Applications |
| CS496102-CQZ | 功能描述:音频 DSP 2x2 CobraNet Audio Network Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| CS496102-CQZ/A1 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Digital Audio Networking Processor |
| CS496102-CQZR | 功能描述:音频 DSP IC CobraNet Trns/AdNtwrkng Prcsr RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。