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CXD2720Q-2 Datasheet(PDF) 18 Page - Sony Corporation |
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CXD2720Q-2 Datasheet(HTML) 18 Page - Sony Corporation |
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18 / 47 page  – 18 – CXD2720Q-2 6. Microcomputer Interface [Relevant pins] RVDT, TRDT, SCK, XLAT, REDY The CXD2720Q-2 performs serial audio interface format setting, volume, coefficient settings of microphone echo delay amount and others by serial data from the microcomputer. Further, bidirectional communication such as internal data read from the CXD2720Q-2 to the microcomputer can be done at the rate of once in 1 LRCK. (1) Pin Structure The five external pins indicated in the table below are allocated for microcomputer interface. Microcomputer interface begins operation when XLAT is received, so RVDT, TRDT, SCK and REDY are connected in common, and by controlling (wiring) only XLAT separately, multiple CXD2720Q-2s can be used. Pin name RVDT TRDT SCK XLAT REDY I O I I O Serial data input from microcomputer. Serial data output to microcomputer. High impedance state unless this pin is set to internal data read state by the microcomputer. Therefore, it is preferable to perform pull-up or pull- down so that potential is not unstable when this pin is not active. Shift clock for serial data. Input data from RVDT is taken according to SCK rise, and output data from TRDT is sent out according to SCK fall. Interprets the 8 bits of RVDT before this signal rises as transmission mode data, and the bits before that as address data. Transmission prohibited while at Low level. Transmission enabled at High. This pin is an open drain, and must be pulled up externally. I/O Function Table 6-1. Microcomputer Interface External Pins |
Similar Part No. - CXD2720Q-2 |
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Similar Description - CXD2720Q-2 |
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