Inhaltszusammenfassung zur Seite Nr. 1
DEM-PCM1717
®
DEM-PCM1717-1
DEM-DAI1717
EVALUATION FIXTURE
DEM-DAI1717
FEATURES BLOCK DIAGRAMS
EVALUATION SOFTWARE AND CONNECTOR
l DEM-PCM1717
Basic evaluation board for the PCM1717
requires an external audio processor for
Centronics Connector
connection to digital audio source.
l DEM-PCM1717-1
DEM-PCM1717 plus Windows evaluation
software and connector.
+V
l DEM-DAI1717
CC
6 Pin Connector GND
Evaluation Software
Evaluation board for the PCM1717 includ-
ing evaluation software and Digital Audio
I
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BLOCK DIAGRAMS (CONT) DEM-PCM1717 Audio Data
Lch Direct Out LRCK/BCK/DATA
256/384fs PCM1717 Lch Capacitive Out Control Data
Rch Direct Out ML/MC/MD Rch Capacitive Out GND +V CC DEM-DAI1717 DAI DAC LPF Lch Direct Out COAX Lch Low Pass Out SPDIF CS8412 PCM1717 OPA2604 OPT Rch Low Pass Out Rch Direct Out GND +V –V GND +V CC S S The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibil
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DEM-PCM1717 The DEM-PCM1717 is the basic evaluation fixture for the The hardware mode can be evaluated using this fixture by PCM1717 ΔΣ audio DAC. This fixture provides an easy way use of the on board DIP switches. These switches are to connect power, data, and interface signals to the DAC. connected to pins on the PCM1717 which force either power or ground to the pin. In the hardware mode some of the Figure 1 shows the block diagram of the DEM-PCM1717. features of the PCM1717 can be exercised.
Inhaltszusammenfassung zur Seite Nr. 4
GND DIN LRCK BCK XTI CLKO CN1 C C S1 S2 S1 ML/MUTE XTAL
MC/DM1 U1 MD/DM0 PCM1717E RSTB MODE 1
20
XTI
XTO
2
19
+ C4
DGND
CLKO
3
18
2.2µF V
ML/MUTE
DD ML
4
17
LRCIN
MC/DM1
5
16
MD
DIN
MC/DM0
6
15
BACKIN
RSTB
MC
C
7
14
5 ZERO
MODE
10µF 8
13
C6 + RSTB
D/C_R
D/C_L
9
12
10µF V R
V L
OUT OUT GND
10 11 AGND V CC + C3
+V CC 2.2µF + C
C
2 1 0.1µF 100µF CN2 R + + 1 C
C
8 7 10µF 10µF CN3 ZO VOR-D VOL-C XTAL, C , C , R1: Not Installed. GND VOR-C VOL-D S1
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FIGURE 4. DEM-PCM1717 Parts Layout and Trace Design. ® 5 DEM-PCM1717
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PCM1717’s special functions are programmed via a 3-wire DEM-PCM1717-1 serial interface. This type of control is commonly referred to This demo board kit consist of a DEM-PCM1717 hardware as serial or software control. The penalty for using this mode board, together with an interface cable, for connecting the is that the DAC must be controlled via external microproces- DEM-PCM1717 to power and connecting the software con- sor or logic. But since most digital audio systems usually trol lines to an
Inhaltszusammenfassung zur Seite Nr. 7
DEM-DAI1717 also allows for operation in the hardware • Also from the previous menu the Program Group that the mode. In this mode, the special functions are limited to de- icon should be added to can be selected. The default choice emphasis frequency selection, soft mute and reset. These of Applications is a good choice for this selection. hardware features are controlled with DIP switches, and no For the rest of this manual it will be assumed that the PC connection is required. software was ins
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installed by default. An optional ground connection can be DEM-DAI1717 SYSTEM BOARD made between the receiver chip and the PCM1717E. Refer INFORMATION to Figure 8 for the orientation of these jumpers. GENERAL SPECIFICATIONS Table I lists the specifications for the DEM-DAI1717 sys- JP tem board. 256fs
LRCK
SPDIF Interface Optical via Toslink BCK
RCA with 75Ω impedance. DATA
System Clock Frequency 256 times sampling frequency, fs GND Digital Audio Interface 16 bits, Normal Format, MSB last 18
Inhaltszusammenfassung zur Seite Nr. 9
HARDWARE CONNECTIONS FOR THE software. The execute menu can be opened by either click- DEM-DAI1717 ing on the “Execute” or by using the Alt-E key sequence. (All of the menus and commands can be activated by using Hardware configuration of the DEM-DAI1717 evaluation the mouse and the left button or Alt key sequences). The board consists of supplying a source of digital audio data, Windows submenu (Alt-W) allows the Attenuation (Alt-A), connecting the board to an IBM-PC parallel port, connecting F
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PCM1717E for a more detailed explanation of these for- PCM1717 FUNCTION CONTROL mats. Selecting either of these formats is done by clicking on This menu controls the De-emphasis, Infinite Zero Detec- the Format window and selecting the desired format. tion, and Operational Enable features of the PCM1717, as shown in Figure 18. These features are controlled by three WIDTH submenus detailed below. This menu controls the number of bits that the PCM1717 uses for digital audio conversion. The choices
Inhaltszusammenfassung zur Seite Nr. 11
+ + + + +
FIGURE 11. DEM-DAI1717 Schematic. ® 11 DEM-PCM1717 1 18 CN1 CN2 19 36 C C C 1 3 4 100µF 100µF 100µF R 11 100Ω C 2 R 0.1µF 12 100Ω R 13 +V CC 100Ω GND +V –V GND +V CC S S R 14 100Ω S0 +V CC S3 ML U1
MC S1 CS8412CP +V MD S 1
28
RSTB 2
27
MODE C 14 3
26
0.1µF CC/FO SDATA S2 C R 4
25
5 26 C R 10kΩ R 330pF 22 3 7 5
24
10µF M1 5.5kΩ 3.9kΩ R Lch Filtered
9 6
23
PCM1717E 100Ω Out MO + 7
22
C
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FIGURE 12. DEM-DAI1717 Parts Layout. ® 12 DEM-PCM1717
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FIGURE 13. DEM-DAI1717 PCB Design. ® 13 DEM-PCM1717
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PCM1717 Control Execute (E) Reset (R) Execute (E) Window (W) Exit (X) Mode Register Register 0 01FFH Register 1 01FFH Register 2 0000H Window (W) Attenuate (A) Register 3 0090H Function (F)
Dataform (D) Control Data Control Data Control Data HOLD HOLD HOLD Attenuate Level Functional Condition Input Format Left DeEmph Format Width LRCK OFF Standard 16 bit Low = R step 255 0.00 dB Output Format Right Mute IZD OPE OFF OFF ON L-Out R-Out Att Ctrl step 255 0.00 dB L-In R-In L < > R CLOSE CLO
Inhaltszusammenfassung zur Seite Nr. 15
PCM1717 Format Control PCM1717 Attenuate Control Control Data HOLD Control Data HOLD Input Format Functional Condition Format Width LRCK DeEmph Standard 16 bit Low = R OFF Output Format Mute IZD OPE L-Out R-Out Att Ctrl OFF OFF ON L-In R-In L < > R CLOSE CLOSE Format Audio Data Format Select DeEmph De-Emphasis Control Standard OFF Standard OFF IIS 48.0kHz
44.1kHz
Width Input Audio Data Bit Select 32.0kHz 16 bit Mute Left and Right DACs Soft Mute 16 bit OFF 18 bit LRCK Polarity of LRCKIN (pin 4
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IMPORTANT NOTICE Texas 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 products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infri
