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4–2

To prevent this from happening, it is necessary for the master to wait until the I2C bus is free (that is, SCL high) before

generating a STOP condition, thus insuring that a valid STOP condition is generated. This provides the optimal

amount of delay and eliminates the need for a software-generated delay.

The I2C master must also wait until the I2C bus is free (that is, SCL high) before generating a START condition.

4.1.3.3 Implementation for PHI Bus

For PHI host interface-based applications, the interrupt request (INTREQ) pin (or interrupt status register polling) may

be used to determine when the TVP5040 is ready to proceed with host interface activity. This eliminates the need

for a software-generated delay.

4.1.3.4 Implementation for VIP

For VIP host interfaced-based application, the slave-terminate and master-retry mechanisms are used to handle the

latency after microprocessor restart. TVP5040 slaves terminate all VIP access until the microprocessor initialization

is completed. Meanwhile, the VIP master repeatedly retries the current VIP access until it is accepted by the

TVP5040. This eliminates the need for a software-generated delay.

4.1.4

Microcode Data File

TI provides the TVP5040 microcode as binary code in a Hex-ASCII file format. Figure 4–1 is an example of this file

format. The file is available via the TI Web pages beginning at URL: http://www.ti.com

80000

00000

303FC

C3F80

MSB

LSB

Figure 4–1. TVP5040 Microcode in Hex-ASCII Format

相關代理商/技術參數	參數描述
TVP5040CPFPG4	功能描述:IC NTSC/PAL VIDEO DECODER 80TQFP RoHS:是類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉換器系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器應用:DVB-S.2 系統電壓 - 電源，模擬:- 電壓 - 電源，數字:- 安裝類型:- 封裝/外殼:模塊供應商設備封裝:模塊包裝:散裝其它名稱:Q4645799
TVP5040EVM	制造商:Texas Instruments 功能描述:EVAL BD TVP5040EVM USER S GUIDE - Bulk
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

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