Real time DSP Professors: Eng. Diego Barral Eng. Mariano Llamedo Soria Julian Bruno.

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Real time DSP Professors: Eng. Diego Barral Eng. Mariano Llamedo Soria Julian Bruno

AD1847 Serial-Port 16-Bit SoundPort Stereo Codec stereo pair of analog-to-digital converters (ADCs) stereo pair of digital-to-analog converters (DACs) Multiple Channels of Stereo Input Line1, Line2, AUX1, AUX2 Analog and Digital Signal Mixing Programmable Gain and Attenuation On-Chip Signal Filters Analog Output Low-Pass Filter Sample Rates from 5.5 kHz to 48 kHz

Functional Block Diagram

Analog Mixing AUX1 and AUX2 analog stereo signals can be mixed in the analog domain with the DAC output. Digital Mixing Stereo digital output from the ADCs can be mixed digitally with the input to the DACs.

Digital Data Types 16-bit twos complement linear PCM 8-bit unsigned linear PCM 8-bit companded m-law 8-bit companded A-law

Control Register Mapping six 16-bit registers thirteen 8-bit registers accessed via indirect addressing

Control Register TSSEL = 0 SDI and SDO pins are tied together “1-wire” system TSSEL = 1 SDI and SDO pins are independent “2-wire” system

Serial Data Interface (I) Time Division Multiplex (TDM) scheme Two audio samples x 32 time slots The format of the first 16 time slots (sample N) is the same as the format of the second 16 time slots (sample N+1)

Serial Data Interface (II)

Serial Data Interface (III)

Data Formats