Ch6-AudioInterface_LabExampleDetails

Ch6-AudioInterface_LabExampleDetails - Microcomputer...

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Unformatted text preview: Microcomputer Systems 1 ADSP-BF533 Ez-Kit Lite Audio Interface 2/11/12 Veton Kpuska 2 Lab #3 Audio Interface 2/11/12 Veton Kpuska 3 ADSP-BF533 Ez-Kit Lite Audio Interface SPI SPORT0 2/11/12 Veton Kpuska 4 BF533 EZ-Kit Lite Audio Interface u EZ-Kit Lite contains AD1836 Audio Codec u The AD1836 audio codec provides n three channels of stereo audio output and n two channels of multi-channel/stereo 96 kHz input. u The SPORT0 interface of the processor links with the stereo audio data input and output pins of the AD1836 codec. u The processor is capable of transferring data to the audio codec in n time-division multiplexed (TDM) or n two-wire interface (TWI) mode. u The TDM mode can operate at a maximum of 48 kHz sample rate but allows simultaneous use of all input and output channels. u The TWI mode allows the codec to operate at a 96 kHz sample rate but limits the output channels to two. n When using TWI mode, the TSCLK0 and RSCLK0 pins, as well as the TFS0 and RFS0 pins of the processor, must be tied together external to the processor. This is accomplished with the SW9 DIP switch (see Push Button Enable Switch (SW9) on page 2-12 for more information). 2/11/12 Veton Kpuska 5 Blackfin Audio Interface Usage u Two-Wire Interface (TWI) and Serial Peripheral Interface (SPI) n Forward channel used to configure and control audio converters n Reverse channel relays feedback info from converters u SPORTs Used as data channel for audio data n SPORT TX connects to audio DAC n SPORT RX connects to audio ADC n Full-duplex SPORT RX/TX connects to audio codec u In some codecs (e.g., AC97), SPORT also can serve as the codec control channel 2/11/12 Veton Kpuska 6 BF533 Interface with AD1871 Configuratio n & Control Data Transfer & Synch 2/11/12 Veton Kpuska 7 SW9 Switch Configuration u Make sure that SW9 switches 5 and 6 are ON & SW12 is ON. See explanation bellow: 1 2 3 4 5 6 2/11/12 Veton Kpuska 8 Switch Default Configuration 2/11/12 Veton Kpuska 9 Push-buttons and LEDs 2/11/12 Veton Kpuska 10 Push Button Enable Switch (SW9 & SW12) u SW9 n Positions 1 through 4: u Connects the drivers associated with the push buttons from the PF pins of the processor. n Positions 5 and 6: u Used to connect the transmit and receive frame syncs and clocks of SPORT0. u This is important when the AD1836 audio/video decoder and the processor are communicating in I2S mode....
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Ch6-AudioInterface_LabExampleDetails - Microcomputer...

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