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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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SAM5708B 데이터시트(PDF) 80 Page - List of Unclassifed Manufacturers |
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SAM5708B 데이터시트(HTML) 80 Page - List of Unclassifed Manufacturers |
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80 / 89 page  SAM5708B SAM5708B.pdf – Rev 14/05/2018 80 © 2015-2018 Dream S.A.S., France 9. Audio Synchronization 9.1. Synchronization on external audio devices In professional applications, it can be decided to synchronize SAM5708B audio processing on external audio flow(s) from USB, SPDIF or Ethernet interfaces. Another professional feature is synchronization on external word clock. 9.1.1. Principle Audio clock frequency is extracted from incoming audio flow or from external word clock and is compared with frequency currently used for internal audio processing. Comparison result is used to control the internal PWM generator. PWM generator output is filtered, and then, can drive an external VCXO. VCXO clock output is used as master clock for internal audio processing. As a result, clock frequency for internal audio processing is perfectly enslaved to incoming audio flow. Pin used: OSC1_X1, OSC1_X2: Connection to 12MHz crystal for USB, Ethernet and system boot. X1: Clock input for audio system clock from VCXO PWM: PWM output XWSBD0 (optional): Input for external Word Clock |
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