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TDA7460ND Datasheet(PDF) 7 Page - STMicroelectronics |
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TDA7460ND Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 31 page DESCRIPTION OF THE AUDIOPROCESSOR PART Programmable Input Matrix The programmable input matrix of the TDA7460N offers several possibilities to adapt the audioproc- essor to the desired application. In to the stand- ard application we have: CD quasi differential Cassette stereo Phone differential AM mono Stereodecoder input. The input matrix can be configured by only 2 bits: bits 3 and 4 of subaddress 0. Basically the bit of subaddress 13 is fixed by the application and has to be programmed only once at the startup of the IC. For many configurations the two bits are also fixed during one application (e.g. the standard ap- plication) and a change of the input source can be done by loading the first three bits of subad- dress 0. In other configurations for some sources a pro- gramming of bit 3 and 4 of subaddress 0 is nec- essary in addition to the three source selection bits. In every case only the subaddress 0 has to be changed to switch from one source to another. The following picture shows the input and source programming flow: TDA7460 CD QD CD FD APPL. 2 APPL. 1 APPL. 3 APPL. 5 APPL. 4 APPL. 6 CD QD CASSETTE FM STD AM MONO PHONE (D) CD QD CASSETTE FM STD AM STEREO PHONE (SE) CD QD CASSETTE FM STD AM STD PHONE (D) CD FD CASSETTE FM STD AM MONO PHONE (SE) CD FD CASSETTE FM STD AM STEREO CD FD CASSETTE FM STD AM STD PHONE (SE) D98AU851 NO MULTIPATH CD FD MULTIPATH CD QD APPL. 8 APPL. 7 CD QD CASSETTE FM STD AM MONO CD QD CASSETTE FM STD AM STD Figure 1. Input Configuration Tree Note: in AMSTD configuration the AM mono signal is lead through the FM stereodecoder part to use its additional filters and high-cut function. TDA7460N 7/31 |
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