SAM5708B datasheet(80/89 Pages) ETC1

номер детали	SAM5708B

подробное описание детали	AUDIO & MUSIC MULTI-DSP PROCESSOR

PDF	89 Pages

Scroll/Zoom	100%

производитель	ETC1 [List of Unclassifed Manufacturers]

домашняя страница

Logo

80 / 89 page

SAM5708B

SAM5708B.pdf

– Rev 14/05/2018

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

SAM5708B датащи(PDF) 80 Page - List of Unclassifed Manufacturers