Texas Instruments TVP5158 manual Additional Setup when DSP Processes Video Only

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5.2.1Additional Setup when DSP Processes Video Only

In this configuration, digital video goes to the DaVinci HD EVM. Digital I2S audio goes to the TLV320DAC32 Audio DAC on the TVP5158EVM. Stereo audio output can then be taken from the TVP5158EVM headphone jack. Make the following additional connections:

1.Samtec HQCD ribbon cable from TVP5158EVM DaVinci Video connector to the DaVinci HD EVM DC_P2 Video Expansion connector.

2.TVP5158EVM headphone jack to audio amplifier/speakers or headphones

5.2.2Additional Setup When DSP Processes Video and Audio

CAUTION

A modification to both the TVP5158EVM and the DaVinci HD EVM must be made if I2S digital audio is to be processed by the DM6467 DSP (see Section 5.2.2.1).

In this configuration, digital video and digital audio go to the DaVinci HD EVM. For the digital audio connection, a hardware modification is required as described in Section 5.2.2.1. The stereo audio is then output from the DaVinci HD EVM headphone jack. After making the hardware modification, make the following additional connections:

1.Samtec HQCD ribbon cable from TVP5158EVM DaVinci Video connector to the DaVinci HD EVM DC_P2 Video Expansion connector

2.Samtec HQCD ribbon cable from TVP5158EVM DaVinci Audio connector to DaVinci HD EVM DC_P3 I/O Expansion connector

3.DaVinci HD EVM headphone jack to audio amplifier/speakers or headphones

5.2.2.1Hardware Modification for I2S Audio to DM6467 DSP

Three 0-Ωresistors must be removed from the TVP5158EVM and three 0-Ωresistors must be removed from the DaVinci HD EVM according to Table 3.

Table 3. Hardware Modifcation for I2S Audio to DM6467

Remove From TVP5158EVM	Remove From DaVinci HD EVM
R42 SD_M	R13 MCASP0_ACLKR
R98 MCASP0_EN	R17 MCASP0_AFSR
R99 AUDIO_CLK_EN	R31 MCASP0_AXR1

NOTE: After this modification has been made, the SD_M I2S digital audio output from TVP5158 will no longer be available. The SD_R output must be used and W9 must be jumpered 2-3. If headphone output from the TVP5158EVM is to be tested using the audio mixer (SD_M I2S output), 0-ohm resistor R42 must be reinstalled and W9 must be jumpered 1-2.

5.2.3Jumper Settings with DaVinci HD EVM

When the DaVinci HD EVM is used, the video and/or audio driver software can be set to control the entire system, or can be set to skip I2C programming of the TVP5158. In the latter case, the PC USB interface and the Video Control Center application software are used to initialize and experiment with TVP5158 register settings through a graphical user interface.

12	TVP5158 Evaluation Module	SLEU108 –November 2009
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