參數(shù)資料
型號(hào)： TVP5151IPBSRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP32
封裝： GREEN, PLASTIC, QFP-32
文件頁數(shù)： 16/86頁
文件大?。?/td> 964K
代理商： TVP5151IPBSRQ1
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
www.ti.com
SLES241C – SEPTEMBER 2009 – REVISED SEPTEMBER 2010
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
Copyright 2009–2010, Texas Instruments Incorporated
Functional Description
23
相關(guān)PDF資料
PDF描述
TVP5151IPBSR COLOR SIGNAL DECODER, PQFP32
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參數(shù)描述
TVP5151IZQC 功能描述:視頻 IC UltraLo-Pwr NTSC/PAL SECAM Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5151IZQCR 功能描述:視頻 IC UltraLo-Pwr NTSC/PAL SECAM Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5151PBS 功能描述:視頻 IC UltraLo-Pwr NTSC/PAL SECAM Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5151PBSR 功能描述:視頻 IC UltraLo-Pwr NTSC/PAL SECAM Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5151ZQC 功能描述:視頻 IC UltraLo-Pwr NTSC/PAL SECAM Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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