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DIR9001 Datasheet(PDF) 11 Page - Texas Instruments |
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DIR9001 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 38 page Clock and Data Recovery SCKO BCKO LRCKO DOUT RXIN Divider FILT XTO XTI FSOUT0 FSOUT1 RST OSC RESET CLKST EMPH UOUT COUT BFRAME VCO CKSEL DGND ERROR AUDIO Power Supply V DD DGND AGND V CC PSCK0 PSCK1 FMT0 RSV PLL Divider Decoder FMT1 Preamble Detector Charge Pump Sampling Frequency Calculator Clock Decoder Biphase Data Decoder Serial AudioData Formatter ERROR Detector Function Control AudioData MUTE Control Channel Status and UserData Output DIR9001 www.ti.com SLES198A – DECEMBER 2006 – REVISED MAY 2015 8 Detailed Description 8.1 Overview The DIR9001 is a digital audio interface receiver that can receive a 28-kHz to 108-kHz sampling frequency, 24- bit-data-word, biphase-encoded signal and output a serial audio signal. The DIR9001 complies with the jitter specification IEC60958-3, JEITA CPR1205 (Revised version of EIAJ CP-1201), AES3, EBUtech3250, and it can be used in various applications that require a digital audio interface. The DIR9001 supports MSB-first PCM data output in 24-bit I2S, 24-bit left justified, 24-bit right justified, or 16-bit right justified form. Sampling rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz are supported on the serial audio data output when in PLL mode. All functions which the DIR9001 provides can be controlled directly through control pins. This means that they can be pulled high or low for full operation of the DIR9001 without a microcontroller. A microcontroller can also be used to drive the function pins to provide an adaptable system. Also, as dedicated pins are provided for the channel-status bit and user-data bit, processing of their information can be easily accomplished by connecting with a microcontroller, DSP, and so on. The DIR9001 can derive a system clock by recovering the source’s clock from the biphase input signal. Therefore, the DIR9001 does not require an external clock source or resonator for decode operation if the internal actual-sampling-frequency calculator is not used which in turn can reduce the system cost. The serial audio data output can also be driven by an external source such as a crystal or ceramic resonator. The operating temperature range of the DIR9001 is specified as –40°C to 85°C, which makes it suitable for automotive applications. 8.2 Functional Block Diagram Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: DIR9001 |
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