Texas Instruments PCM510 EVM-U Series, Руководство пользователя, Страница: 4 / 23

SW3
W5
TAS1020B MCLK (11.288 MHz)
EXT 3.3 V BNC MCLK
24.576 MHz OSC
RXCKO
MCLK Select
SRC4392 Sample Rate Converter
DIR DIT
SRC
RXCKO
Audio Serial Port B Audio Serial Port A
TAS1020B USB Microcontroller
USB I/F
I S
2
I C/SPI
2
GPIO
Mini-USB
S/PDIF
(Optical)
S/PDIF
(RCA)
W3
Interface
Selection
PCM510x
2.1 V DAC
RMS
Analog
Outputs
PCM510xEVM-U
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It should be noted that the PCM510xEVM-U is divided into two sections. The left half contains the digital
and USB interface, sample rate conversion, optical/SPDIF and RCA digital inputs, clock circuitry, and
reset logic. The right half contains the PCM510x device and the analog circuitry accompanying it. Note
that this half of the PCM510xEVM-U is the portion required on a potential customer application. The left
half is intended to emulate a wide variety of testing options and scenarios for the PCM510x device.
It should also be noted that the digital interface section, or left half of the PCM510xEVM-U, is a four-layer
design. However, the PCM510x device and analog circuitry, or right half of the EVM board, consists only
of two layers.
For the analog circuitry surrounding the PCM510x device, certain components can be removed at the cost
of higher performance. This configurability may allow for optimal ratio between board space and
performance. Components such as C1, C3, C7, and C11 can all be removed for additional board space.
The PCM510xEVM-U features:
• USB Interface
• Analog output
• TX output (J5)
• Optical/SPDIF input
• I
2
S input
• Hardware- and software-programmable options
• Digital audio interface test points
• Control interface test points
2.3 EVM Block Diagram
Figure 2 shows the block diagram for the PCM510xEVM-U.
Figure 2. PCM510xEVM-U Block Diagram
4 PCM510xEVM-U SBAU190A – May 2011 – Revised June 2011
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