- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98305 > TVP5041PFP (TEXAS INSTRUMENTS INC) COLOR SIGNAL DECODER, PQFP80 PDF資料下載
參數(shù)資料
| 型號： | TVP5041PFP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | COLOR SIGNAL DECODER, PQFP80 |
| 封裝： | POWER, PLASTIC, TQFP-80 |
| 文件頁數(shù)： | 4/106頁 |
| 文件大?。?/td> | 501K |
| 代理商： | TVP5041PFP |
第1頁第2頁第3頁當(dāng)前第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁
4–1
4 Application Information
4.1
Microcode Download
The TVP5041 has an internal processor and an associated 5Kx20 instruction RAM. The microprocessor controls
many of the device functions including PLL operation, AGC, sync, and register configuration. This programmable
architecture allows the TVP5041 performance to be enhanced with upgraded algorithms. The microcode for the
internal processor is downloaded to the TVP5041 during each power-up as described later.
The details of downloading the microcode depends on the host interface being used (I2C, VIP, or PHI).
4.1.1
Timing Requirement for Start of Download
Following the negation of the reset signal (RSTINB asserted high), the microcode instructions may be downloaded
after at least 4 pixel clock (PCLK) cycles have elapsed. Note that this time period is longer if the TVP5041 has not
already been initialized.
4.1.2
General Microcode Download Procedure
In general, the procedure is initiated by addressing the program RAM write register (address 7Eh) for a write
operation. After this the internal microprocessor is disabled and the internal microcode RAM is ready for microcode
download. The first instruction byte and subsequent instruction bytes written to the program RAM write register are
loaded to sequential locations of the microcode RAM. Each 20-bit instruction is transmitted using three bytes, with
the most significant byte first. Since the microcode RAM is 20-bit wide, the upper four bits of the most significant byte
are discarded before the data is written to the microcode RAM.
It is possible to complete the microcode download in a single burst of consecutive write cycle. If needed, the data may
be transmitted in separate blocks, so long as no other TVP5041 register (other than address 7Eh) is accessed in
between blocks. If another TVP5041 register is accessed, the microprocessor internal instruction RAM address
pointer is reset to zero and resumes operation.
4.1.3
Microprocessor Restart Operation
As noted before, the internal microprocessor unit is disabled during microcode download. Therefore, after completion
of the microcode download (that is, all microcode instructions have been written to the program RAM), a write cycle
to a register 7Fh is required to wake up the microprocessor and restart normal operation of the TVP5041.
4.1.3.1 Timing Requirement fort Microprocessor Restart
After the microprocessor-restart operation has been initiated, the microprocessor takes up to 5 ms for its initialization
code to complete. Only then register initialization via the host port begin. The following sections describe how this
latency is handled for the different host interfaces.
4.1.3.2 Implementation for I2C Bus
After the restart operation has been performed, the TVP5041 drives the I2C clock (SCL) low to signal the I2C master
to wait I2C implementation vary in the way this is handled. A problem arises when the I2C master tries to generate
STOP condition without checking if the I2C bus is free (that is, SCL high). This attempted-STOP condition is not
recognized by the I2C slave. The master then stops for a software-generated delay to meet the timing requirement
mentioned in Section 4.1.3.1. Finally, the I2C master resumes operation by generating a START condition. Since no
STOP condition was recognized by the slave, this is seen as a RESTART condition, which the TVP5041 does not
support.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TVP5146M1PFP | COLOR SIGNAL DECODER, PQFP80 |
| TVP5146M2IPFPR | COLOR SIGNAL DECODER, PQFP80 |
| TVP5146M2IPFP | COLOR SIGNAL DECODER, PQFP80 |
| TVP5146M2PFPR | COLOR SIGNAL DECODER, PQFP80 |
| TVP5146M2PFP | COLOR SIGNAL DECODER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TVP5145 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NTSC/PAL/SECAM/Component Digital Video Decoder With Macrovision(TM) Detection |
| TVP5145EVM | 制造商:Texas Instruments 功能描述:TVP5145EVM - Bulk |
| TVP5145PFP | 功能描述:視頻 IC NTSC/PAL/SECAM/ Comp Dig 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 |
| TVP5146 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL / SECAM 4 X 10 BIT DIGITAL VIDEO DECODER WITH MACROVISION DETECTION YPBPR/RGB INPUTS 5 LINE COMB FILTER AND SCART SUPPORT |
| TVP5146_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL/SECAM 4x10-Bit Digital Video Decoder With Macrovision?￡a Detection, YPbPr/RGB Inputs, 5-Line Comb Filter, and SCART Support |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。