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参数资料
| 型号： | TVP5151ZQC |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 颜色信号转换 |
| 英文描述： | COLOR SIGNAL DECODER, PBGA48 |
| 封装： | GREEN, PLASTIC, BGA-48 |
| 文件页数： | 15/85页 |
| 文件大小： | 958K |
| 代理商： | TVP5151ZQC |
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SCLK
GLCO
23-Bit Frequency Control
Start Bit
DTO Reset Bit
MSB
>128 SCLK
1 SCLK
7 SCLK
23 SCLK
1 SCLK
LSB
22
21
0
TVP5151
SLES241D – SEPTEMBER 2009 – REVISED MARCH 2011
www.ti.com
3.17 Genlock Control (GLCO) and RTC
A Genlock control function is provided to support a standard video encoder to synchronize its internal
color oscillator for properly reproduced color with unstable timebase sources such as VCRs.
The frequency control word of the internal color subcarrier digitally tuned oscillator (DTO) and the
subcarrier phase reset bit are transmitted via terminal 23 (GLCO). The frequency control word is a 23-bit
binary number. The frequency of the DTO can be calculated from the following equation:
fdto = (fctrl/2
23) × f
sclk
where fdto is the frequency of the DTO, fctrl is the 23-bit DTO frequency control, and fsclk is the frequency of
the SCLK.
3.17.1 GLCO Interface
A write of 1 to bit 4 of the chrominance control register at I2C subaddress 1Ah causes the subcarrier DTO
phase reset bit to be sent on the next scan line on GLCO. The active-low reset bit occurs seven SCLKs
after the transmission of the last bit of DTO frequency control. Upon the transmission of the reset bit, the
phase of the TVP5151 internal subcarrier DTO is reset to zero.
A Genlock slave device can be connected to the GLCO terminal and uses the information on GLCO to
synchronize its internal color phase DTO to achieve clean line and color lock.
Figure 3-9 shows the timing diagram of the GLCO mode.
Figure 3-9. GLCO Timing
22
Functional Description
Copyright 2009–2011, Texas Instruments Incorporated
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| TVP5151ZQCR | 功能描述:视频 IC UltraLo-Pwr NTSC/PAL SECAM Vid Dec 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 |
| TVP5154 | 制造商:Texas Instruments 功能描述:4-channel 9-bit Video Decoder TVP5154 |
| TVP5154A | 制造商:TI 制造商全称:Texas Instruments 功能描述:4-Channel Low-Power PAL/NTSC/SECAM Video Decoder With Independent Scalers and Fast Lock |
| TVP5154AIPNP | 功能描述:视频 IC 4Ch Lo Pwr PAL/NTSC/ SECAM Video Decoder 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 |
| TVP5154AIPNPR | 功能描述:视频 IC 4Ch Lo Pwr PAL/NTSC/ SECAM Video Decoder 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 |
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