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Texas Instruments DEM-PCM1717 manual

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Table of contents for the manual

  • Page 1

    1 ® DEM-PCM1717 ® © 1996 Burr-Brown Corporation LI-475 Printed in U.S.A. July, 1996 DEM-PCM1717 DEM-PCM1717-1 DEM-DAI1717 EVALUATION FIXTURE FEA TURES ● DEM-PCM1717 Basic evaluation board for the PCM1717 requires an external audio processor for connection to digital audio source. ● DEM-PCM1717-1 DEM-PCM1717 plus Windows evaluation software a[...]

  • Page 2

    2 ® DEM-PCM1717 BLOCK DIAGRAMS (CONT) PCM1717 GND Audio Data LRCK/BCK/DATA 256/384fs Control Data ML/MC/MD Lch Direct Out Lch Capacitive Out Rch Direct Out Rch Capacitive Out +V CC DEM-DAI1717 DEM-PCM1717 The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions[...]

  • Page 3

    3 ® DEM-PCM1717 DEM-PCM1717 The DEM-PCM1717 is the basic evaluation fixture for the PCM1717 ∆Σ audio DAC. This fixture provides an easy way to connect power, data, and interface signals to the DAC. Figure 1 shows the block diagram of the DEM-PCM1717. The user must supply 4 digital audio signals, power, and mode control signals. The DAC will the[...]

  • Page 4

    4 ® DEM-PCM1717 FIGURE 3. DEM-PCM1717 Schematic. CN2 ML MD MC RSTB GND +V CC + S1 ML/MUTE MC/DM1 MD/DM0 RSTB MODE C6 10µF R 1 + C3 2.2µF + C 2  0.1µF C 1  100µF PCM1717E 1 2 3 4 5 6 7 8 9 10 XTI DGND V DD  LRCIN DIN BACKIN ZERO D/C_R V OUT R AGND XTO CLKO ML/MU[...]

  • Page 5

    5 ® DEM-PCM1717 FIGURE 4. DEM-PCM1717 Parts Layout and Trace Design.[...]

  • Page 6

    6 ® DEM-PCM1717 DEM-PCM1717-1 This demo board kit consist of a DEM-PCM1717 hardware board, together with an interface cable, for connecting the DEM-PCM1717 to power and connecting the software con- trol lines to an IBM-PC parallel port. DEM-PCM1717 also includes evaluation software, described later under Software Description. The interface cable c[...]

  • Page 7

    7 ® DEM-PCM1717 DEM-DAI1717 also allows for operation in the hardware mode. In this mode, the special functions are limited to de- emphasis frequency selection, soft mute and reset. These hardware features are controlled with DIP switches, and no PC connection is required. DEM-DAI1717 SYSTEM CONTENTS • DEM-DAI1717 Evaluation Board • DEM-DAI171[...]

  • Page 8

    8 ® DEM-PCM1717 DEM-DAI1717 SYSTEM BOARD INFORMA TION GENERAL SPECIFICATIONS Table I lists the specifications for the DEM-DAI1717 sys- tem board. SPDIF Interface Optical via Toslink RCA with 75 Ω impedance. System Clock Frequency 256 times sampling frequency, fs Digital Audio Interface 16 bits, Normal Format, MSB last 18 bits, Normal Format, MSB[...]

  • Page 9

    9 ® DEM-PCM1717 HARDWARE CONNECTIONS FOR THE DEM-DAI1717 Hardware configuration of the DEM-DAI1717 evaluation board consists of supplying a source of digital audio data, connecting the board to an IBM-PC parallel port, connecting the audio output to a speaker or measurement tool and supplying a source of power to the system board. Digital Audio So[...]

  • Page 10

    10 ® DEM-PCM1717 PCM1717E for a more detailed explanation of these for- mats. Selecting either of these formats is done by clicking on the Format window and selecting the desired format. WIDTH This menu controls the number of bits that the PCM1717 uses for digital audio conversion. The choices are either 16 or 18 bits. LRCK This menu selection all[...]

  • Page 11

    11 ® DEM-PCM1717 FIGURE 11. DEM-DAI1717 Schematic. +  C 21  10µF R 15 + C 17  0.1µF C 16  10µF PCM1717E 1 2 3 4 5 6 7 8 9 10 XTI DGND V DD  LRCIN DIN BACKIN ZERO D/C_R V OUT R AGND XTO CLKO ML/MUT MC/DM2 MC/DM1 RSTB MODE D/C_L V OUT L V CC 20 19 1[...]

  • Page 12

    12 ® DEM-PCM1717 FIGURE 12. DEM-DAI1717 Parts Layout.[...]

  • Page 13

    13 ® DEM-PCM1717 FIGURE 13. DEM-DAI1717 PCB Design.[...]

  • Page 14

    14 ® DEM-PCM1717 FIGURE 15. Demo Software Attenuation Menu. FIGURE 14. Demo Software Main Menu. Control Data Input Format HOLD CLOSE Format Standard Width LRCK Low = R Output Format L-Out L-In R-Out R-In Att Ctrl L < > R 16 bit Control Data Functional Condition HOLD CLOSE DeEmph OFF Mute OFF IZD OFF OPE ON Control Data Attenuate Level HOLD C[...]

  • Page 15

    15 ® DEM-PCM1717 FIGURE 16. Demo Software Format Menu. FIGURE 17. Demo Software Function Menu. Control Data PCM1717 Attenuate Control Functional Condition HOLD CLOSE DeEmph OFF DeEmph De-Emphasis Control OFF Mute OFF IZD OFF OPE ON Mute OFF IZD OFF OPE Left and Right DACs Soft Mute Internal Zero Detection Circuit Control Left and Right DACs Operat[...]

  • Page 16

    IMPORT ANT NOTICE T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify , before placing orders, that information being relied on is current and complete. All product[...]