Texas Instruments PCM6xx0Q1EVM-PDK User manual

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PCM6xx0Q1EVM-PDK Evaluation Module
User's Guide
SBAU341B–January 2020–Revised June 2020
PCM6xx0Q1EVM-PDK Evaluation Module
This user's guide describes the function and use of the PCM6xx0Q1EVM-PDK. This document includes
the hardware configuration instructions, a quick-start guide, jumper and connector descriptions, software
description, schematics, and printed circuit board (PCB) layout that demonstrate TI's recommended
practices for these devices.
Contents
1 Introduction ................................................................................................................... 3
2 Hardware Overview.......................................................................................................... 3
2.1 AC-MB Settings..................................................................................................... 3
2.2 PCM6xx0Q1EVM-PDK Hardware Settings...................................................................... 7
3 Software Overview......................................................................................................... 17
3.1 PurePath Console 3 Installation................................................................................. 17
3.2 PCM6xx0Q1EVM GUI Installation and Setup ................................................................. 18
4 Software Overview......................................................................................................... 20
4.1 Configuration View................................................................................................ 20
4.2 End System Integration........................................................................................... 29
4.3 Register Map....................................................................................................... 30
5 Quick Start .................................................................................................................. 31

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5.1 Saving a Configuration ........................................................................................... 33
6 System Overview........................................................................................................... 34
7 Schematic and Bill of Materials........................................................................................... 35
7.1 PCM6260Q1EVM Schematic and Bill of Materials ........................................................... 35
7.2 PCM6240Q1EVM Schematic and Bill of Materials (BOM)................................................... 42
7.3 PCM6360Q1EVM Schematic and Bill of Materials (BOM)................................................... 49
7.4 AC-MB Schematic and Bill of Materials ........................................................................ 55
8 Matlab Audio Capture Example .......................................................................................... 60
List of Tables
1 PCM6xx0Q1 Family ......................................................................................................... 3
2 Input Jumper Configuration................................................................................................. 8
3 Recommended AC-Coupled Line Input Bias Resistor Values ....................................................... 10
4 I2C Address Selection...................................................................................................... 16
5 PCM6260Q1EVM Bill of Materials....................................................................................... 37
6 PCM6240Q1EVM Bill of Materials....................................................................................... 44
7 PCM6360Q1EVM Bill of Materials....................................................................................... 51
8 AC-MB Bill of Materials.................................................................................................... 57
Trademarks
PurePath is a trademark of Texas Instruments.
Audio Precision is a trademark of Audio Precision, Inc.
Audio Toolbox is a trademark of MathWorks.
All other trademarks are the property of their respective owners.

MUX
USB
Optical Input
Stereo Analog
Input
External ASI Hea der
Source
Selector
(SW2)
Aud io
Pro cessor
PCM921 1Optical Output
To EVM
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PCM6xx0Q1EVM-PDK Evaluation Module
1 Introduction
The PCM6xx0Q1EVM-PDK is an evaluation module (EVM) designed to demonstrate the performance and
functionality of the PCM6xx0 family of devices. This family includes the devices shown in Table 1 with
differences in performance and function noted. Throughout this document, the abbreviation EVM and the
term evaluation module are synonymous with the PCM6xx0Q1EVM-PDK.
Table 1. PCM6xx0Q1 Family
Device Integrated Boost Number of Channels
PCM6260Q1 Yes 6
PCM6240Q1 Yes 4
PCM6360Q1 No 6
2 Hardware Overview
The evaluation kit consists of the PCM6xx0EVM daughterboard and the AC-MB motherboard. The
motherboard is used to provide power, control, and digital audio signals to the evaluation module. The
daughterboard contains the PCM6xx0Q device and its input connections. A detailed functional overview of
the PCM6xx0Q1EVM system is described in Section 6.
2.1 AC-MB Settings
2.1.1 Audio Serial Interface Settings
The AC-MB provides the digital audio digital signals to the evaluation module from the universal serial bus
(USB), optical, stereo jack, and external audio serial interface (ASI) header. Figure 1 shows a block
diagram of the ASI routing on the AC-MB.
Figure 1. AC-MB Audio Serial Interface Routing
Switch SW2 on the AC-MB selects the audio serial bus that interfaces with the PCM6xx0EVM. Next to
switch SW2, the AC-MB has a quick reference table to identify the audio serial interface source options
and switch settings. The AC-MB acts as the master for the audio serial interface, with three different
modes of operation (see Figure 2): USB, optical or analog, or external ASI.

ON
S1 S0
ON
S1 S0
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2.1.1.1 USB
The serial interface clocks and data are provided from the USB interface. The sampling rate and format
are determined by the USB audio class driver on the operating system. The default settings for the USB
audio interface are 32-bit frame size, 48-kHz sampling rate, BCLK and FSYNC ratio is 256, and the format
is time-division multiplexing (TDM).
The AC-MB is detected by the OS as an audio device with the name TI USB Audio UAC2.0.Figure 2
shows the AC-MB audio setting for the USB mode of operation.
Figure 2. AC-MB USB Audio Setting
2.1.1.2 Optical or Auxiliary Analog Audio Input
Serial interface signals are provided from the PCM9211 digital transceiver, which is capable of sending
digital data to the EVM from an analog input or optical input. Meanwhile, the data from the EVM can be
streamed through the optical output. Figure 3 shows the AC-MB audio setting for the optical and analog
mode of operation.
Figure 3. AC-MB Optical or Auxiliary Analog Audio Setting
The optical output of the AC-MB streams the data captured on the EVM with the format determined by the
input source used. When there is an optical input connected, the LOCK LED must be ON, and the
PCM9211 streams the audio serial interface clocks with the format determined by the optical input frame.
The digital data from the optical input is streamed to the evaluation module. If the optical input is not
connected, the PCM9211 captures the input signal provided through the analog input, and streams the
signal to the evaluation module. This feature can be useful when a digital input digital-to-analog converter
(DAC) is connected to the AC-MB, providing an analog input for quick evaluation. In auxiliary analog audio
mode, the audio serial interface format is fixed to a 24-bit, 48-kHz, I2S mode.

Host Processor / Audio Analyzer
MCLK BCLK
FSYNC
DIN DOUT
GND
ON
S1 S0
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2.1.1.3 External
In this mode, the audio serial interface clocks for the evaluation board are provided through connector J7
from an external source. This architecture allows an external system to be used for communication with
the evaluation board, such as a different host processor or test equipment (for instance, Audio Precision™
PSIA). The clocks generated from the USB interface and PCM9211 are isolated with this setting. Figure 4
shows the AC-MB audio setting for the external mode of operation.
Figure 4. AC-MB External Audio Setting
Figure 5 shows how to connect the external audio interface. Odd numbered pins are signal carrying, and
even numbered pins are connected to ground.
Figure 5. AC-MB Connection With External Audio Serial Interface

To EVM
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2.1.2 AC-MB Power Supply
The complete EVM system is powered from a single 5-V power supply. However, the motherboard has
different low-dropout regulators (LDOs) integrated that provide the required power supplies to the different
blocks of the board. Figure 6 shows a block diagram depicting the power structure of the AC-MB.
Figure 6. Power-Supply Distribution of the AC-MB
The AC-MB can be powered from the host computer by using the USB 5-V power supply (VBUS) by
shorting header J5, USB POWER. Additionally, the AC-MB can be powered from an external power
supply connected to terminal J4, EXTERNAL POWER. Header J5 must be open for external supply
operation. The IOVDD voltage for the digital signals that is provided to the evaluation module is generated
on the motherboard from the main power supply (USB or external).
The voltage levels available are 1.8 V and 3.3 V, and can be selected via the J3 header IOVDD. For 1.8-V
operation, short pins 2 and 3 of header J3; for 3.3-V operation, short pins 1 and 2. When the motherboard
is fully powered and the power supplies from the onboard LDOs are correct, the green POWER LED (D3)
turns ON. The USB READY LED indicates that a successful USB communication is established between
the AC-MB and the host computer.

PCM6xx0Q1
IN6P IN6M
J25 J26
IN5P IN5M
J22 J23
IN4P IN4M
J19 J20
IN3P IN3M
J16 J17
R34
MICBIAS MICBIA S
GND
PCM6x60Q1EVM Only
+-
IN4
+-
IN3
+-
IN5
+-
IN6
J15 J18 J21 J24
MICBIAS
R35 R36
MICBIAS
R37 R38
MICBIAS
R39 R40 R41
R45
DNP
GND
R44
DNP
GND
R43
DNP
GND
R42
DNP
1k
GND
MK1
PCM6xx0Q1
J37
J36
IN1P IN1M
J7 J8
IN2P IN2M
J9 J10
4.7k
1k
4.7k 4.7k
1k
1k
GND
4.7k
MICBIAS MICBIA SMICBIAS
J6
J5
J4
J3
J11 J12 J13 J14
+-
IN2
+-
IN1
J1 J2
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2.2 PCM6xx0Q1EVM-PDK Hardware Settings
The PCM6xx0Q evaluation module has several input configuration options and offers extensive flexibility
that allows the user to evaluate the device in multiple operation modes. The different operation modes are
highlighted in this section. Figure 7 shows the architecture of the inputs to the evaluation module.
Figure 7. PCM6xx0EVM Input Architecture for Channels 1 and 2
The IN1 and IN2 input architecture allows these two channels to be quickly configured to support any of
the supported operation modes. The IN1P and IN1M pins of the PCM6xx0 can optionally connect to an
onboard microphone for quick evaluation of a microphone in AC- or DC-coupled modes. Jumper
configuration details can be found in Table 2.
As shown in Figure 8, the input architecture for channels 3-6 of the PCM6xx0Q1EVM is streamlined.
These channels support only AC-coupled line inputs by default, however DC-coupled line and Mic inputs
are supported though the removal or replacement of R34-R45. Table 2 lists the recommended values for
bias resistors for AC-coupled inputs across the MICBIAS voltage and input swing.
Figure 8. PCM6xx0Q1EVM Input Architecture for Channels 3-6

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Table 2. Input Jumper Configuration
Input Terminal Input Mode Jumpers Input Swing
IN1
Differential, AC-coupled J3, J7, J8 uninstalled; J11, J12,
and J27 installed 10 VRMS
Single-ended, AC-coupled J3, J7, J8 uninstalled; J4 (2-3),
J11, J12, and J27 installed 5 VRMS
Differential, DC-coupled J3, J4, J11, and J12
uninstalled; J7 and J8 installed 2 VRMS (normal mode)
10 VRMS (high swing mode)
Single-ended, DC-coupled J3, J11, and J12 uninstalled;
J4 (2-3), J7, and J8 installed 1 VRMS (normal mode)
5 VRMS (high swing mode)
On-board electrect microphone J11 and J12 uninstalled; J3, J4
(2-1), J7, J8, and J27 installed
IN2
Differential, AC-coupled J5, J6, J9, J10, J13, and J14 uninstalled; J12, J14, and J27
installed 10 VRMS
Single-ended, AC-coupled J5, J9, J10, J13, and J14 uninstalled; J6 (2-3), J12, J14,
and J27 installed 5 VRMS
Differential, DC-coupled J5, J6, J13, and J14 uninstalled; J9 and J10
installed
2 VRMS (normal mode)
10 VRMS (high swing mode)
Single-ended, DC-coupled J5, J13, and J14 uninstalled;
J6 (2-3), J9 and J10 installed 1 VRMS (normal mode)
5 VRMS (high swing mode)
External electrect microphone J5, J6 (2-1), J9, J10, and J27
installed
IN3
Differential, AC-coupled J16 and J17 uninstalled; J27
installed 10 VRMS
Single-ended, AC-coupled 5 VRMS
Differential, DC-coupled J16 and J17 installed; J27
optional (MICBIAS); R34 and
R35 removed
2 VRMS (normal mode)
10 VRMS (high swing mode)
Single-ended, DC-coupled 1 VRMS (normal mode)
5 VRMS (high swing mode)
External electrect microphone
IN4
Differential, AC-coupled J19, J20, and J27 uninstalled 10 VRMS
Single-ended, AC-coupled 5 VRMS
Differential, DC-coupled J19 and J20 installed; J27
optional (MICBIAS); R36 and
R37 removed
2 VRMS (normal mode)
10 VRMS (high swing mode)
Single-ended, DC-coupled 1 VRMS (normal mode)
5 VRMS (high swing mode)
External electrect microphone
IN5
Differential, AC-coupled J22, J23, and J27 uninstalled 10 VRMS
Single-ended, AC-coupled 5 VRMS
Differential, DC-coupled J22 and J23 installed; J27
optional (MICBIAS); R38 and
R39 removed
2 VRMS (normal mode)
10 VRMS (high swing mode)
Single-ended, DC-coupled 1 VRMS (normal mode)
5 VRMS (high swing mode)
External electrect microphone
IN6
Differential, AC-coupled J25, J26, and J27 uninstalled 10 VRMS
Single-ended, AC-coupled 5 VRMS
Differential, DC-coupled J25 and J26 installed; J27
optional (MICBIAS); R40 and
R41 removed
2 VRMS (normal mode)
10 VRMS (high swing mode)
Single-ended, DC-coupled 1 VRMS (normal mode)
5 VRMS (high swing mode)
External electrect microphone

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2.2.1 Line Inputs
For the line input configuration (shown in Figure 9), the PCM6xx0Q1 captures the audio signal provided
through terminals J2 (IN1), J3 (IN2), J15 (IN3), and J18 (IN4). For six-channel variants, J21 (IN5) and J24
(IN6) are also available. The input accepted in this mode is a differential, 2-VRMS, or 10-VRMS (high swing
mode) full-scale audio signal. If a single-ended source is used, the 1-VRMS or 5-VRMS (high swing mode)
signal is supported. The input bias resistors have been selected to support line inputs in high swing mode.
Figure 9. PCM6xx0Q1EVM Connection for Line Input Application

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2.2.1.1 AC-Coupled Line Input Biasing
The default values for the input bias resistors have been optimized to support full-scale input, however if a
lower input swing is used and higher input impedance desired, these bias resistors can be replaced with
optimized values. Table 3 lists the recommended values for these resistors. For lower input swing, the
PGA is required to reach full-scale input.
Table 3. Recommended AC-Coupled Line Input Bias Resistor Values
Input Type Input Swing MICBIAS Voltage Recommended Bias Resistor
for AC-Coupled Input
Differential
10 VRMS 9 V 4.7 kΩ
2 VRMS
9 V 150 kΩ
7 V 110 kΩ
5 V 62 kΩ
Single-ended
5 VRMS 9 V 4.3 kΩ
1 VRMS
9 V 47 kΩ
7 V 30 kΩ
5 V 15 kΩ

External
Electret
Microphone
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2.2.2 Onboard Microphone Input
For the onboard microphone input configuration (shown in Figure 10), the PCM6xx0Q1 records the audio
captured from the microphones located on the bottom edge of the board. MICBIAS is used to power the
onboard microphone, so header J27 must be shorted. There must not be any connections to J1 while the
onboard microphone is used to preserve the performance of the microphone. J2 can be used for an
external electret microphone; however this architecture may require the bias resistors R4 and R2 be
changed to optimize microphone performance.
Figure 10. PCM6xx0Q1EVM Connection for the Onboard Microphone Test

To J1.1
(IN1P)
INP INM
To J1.3
(IN1M)
To J1.1
(IN1P)
INP INM
Single-ended Input Test Setup
Short to MICBIAS
Differential Input Test Setup
Short to MICBIAS
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2.2.3 Diagnostics Hardware Setup
The diagnostics test circuitry, as shown in Figure 11, is not connected to any channel by default. Connect
J32 and J34 to the INxP and INxM pins of the channel under test. With the onboard diagnostics test
circuitry, only one channel can be tested at a time. A fault is introduced by pressing SW1.
Figure 11. PCM6xx0Q1EVM Diagnostics Circuitry
The diagnostic test selection is done by populating a jumper on the pins of J33, but only install one jumper
at any one time. TI's recommended settings for this diagnostics test circuit are discussed in this section.
2.2.3.1 Short to MICBIAS Setup
Figure 12 shows a short to the MICBIAS test. If using a single-ended input for the test channel, only
connect INxP.
Figure 12. Short to MICBIAS Diagnostic Test Setup

To J1.1
(IN1P)
INP INM
To J1.1
(IN1P)
INP INM
To J1.3
(IN1M)
Single-ended Input Test Setup
Short to VBAT
Differential Input Test setup
Short to VBAT
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2.2.3.2 Short to VBAT Setup
A short to VBAT tests (shown in Figure 13) requires an external voltage source connected to VBAT via
J38. If no voltage is provided for VBAT, enable the diagnostic mask for a short to VBAT to prevent false
triggers.
Figure 13. Short to VBAT Diagnostic Test Setup
2.2.3.3 Shorted Input Pins Setup
Shorted input testing (Figure 14) can be performed for differential inputs only.

To J1.1
(IN1P)
To J1.3
(IN1M)
INP INM
To J1.1
(IN1P)
INP INM
Single-ended Input Test setup Differential Input Test setup
To J1.1
(IN1P)
To J1.3
(IN1M)
INP INM
Differential Input Test setup
Inputs shorted
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Figure 14. Inputs Shorted Diagnostic Test Setup
2.2.3.4 Short to GND Setup
Figure 15 shows the short to ground testing for the inputs.
Figure 15. Short to Ground Diagnostic Test Setup

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2.2.4 GPIO1 Hardware Configurations
GPIO1 has many configuration options, however the EVM supports three modes. These modes are
configured, as shown in Figure 16, by the installation or removal of resistors on the bottom of the EVM.
Figure 16. GPIO1 Hardware Configuration
2.2.4.1 GPIO1 as INTz (Default Configuration)
The default configuration for GPIO1 on the PCM6xx0Q1EVM is as an interrupt indicator. When configured
in this state, and when the onboard diagnostics detect a fault, an interrupt request is sent on GPIO1,
which causes LED D3 on the EVM to illuminate, indicating to the user that a fault is detected. The user
can then use the EVM software to provide diagnostic feedback.
2.2.4.2 GPIO1 as an MCLK Input
When the PCM6xx0Q1 device must be configured as the audio serial bus master, an external MCLK is
required. To support an external MCLK, remove R21 and install a R22. This process connects the GPIO
to the MCLK pin of the external ASI header. Master mode is only supported with an external ASI.
2.2.4.3 Other Supported GPIO1 Functionality
Other GPIO functionality can also be supported by using the GPIO1 header (J28). This approach requires
the removal of both R21 and R22. In this configuration the GPIO1 can be connected using J28.

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2.2.5 I2C Address Configuration
Configuring the address of the PCM6xx0Q1 device on the EVM is typically not required for evaluation use,
however configuring the address is supported by populating pullup or pulldown resistors on the I2C portion
of the control selection area, as shown in Figure 17, on the bottom of the EVM.
Figure 17. I2C Control Selection
A configuration guide is provided in Table 4 for the convenience of the user.
Table 4. I2C Address Selection
I2C Address Installed Uninstalled
1001 000 R12, R14 R11, R13
1001 001 R11, R14 R12, R13
1001 010 R12, R13 R11, R14
1001 011 R11, R13 R12,R14

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3 Software Overview
Texas Instrument's PurePath™ console 3 (PPC3) graphical development suite is a program that serves as
a platform for many of TI's audio products. PPC3 is designed to simplify the evaluation, configuration, and
debug process associated with the development of audio products.
3.1 PurePath Console 3 Installation
The PCM6xx0Q1EVM-PDK GUI is an application that installs into the PPC3 framework. PPC3 must be
installed prior to downloading the PCM6xx0Q1EVM-PDK GUI. To download the PPC3, visit
www.ti.com/tool/PUREPATHCONSOLE and request access. If the PPC3 is already installed, proceed to
Section 3.2.Figure 18 shows the setup directory for the PPC3 installation.
Figure 18. PurePath Console 3 Installation
Open the PPC3 installer and follow the instructions in the setup wizard.

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3.2 PCM6xx0Q1EVM GUI Installation and Setup
3.2.1 Requesting Access to the PCM6260Q1EVM-SW
Access to the PCM6260Q1EVM-SW can be requested from the www.ti.com/tool/PCM6260Q1EVM.
3.2.2 USB Audio Setup
When using the USB audio interface, the Texas Instruments USB audio device control panel, shown in
Figure 19, opens with the input setting configured for 8 channel, 32 bits. For USB audio, 32-bit mode must
be used on the EVM as well.
Figure 19. Texas Instruments USB Audio Device Control Panel
3.2.3 Software Setup
Open the PPC3 application in the directory chosen for the GUI installation in Section 3.1.Figure 20 shows
the resulting app center window. Click on the PCM6xx0 app tile.
Figure 20. PurePath Console 3 App Center

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The PCM6xx0 GUI is designed to work with up to four devices at any time. As shown in Figure 21, choose
the 1device radial button and click New.
Figure 21. Initial GUI Configuration
As shown in Figure 22, the GUI opens to the Audio Config tab.
Figure 22. Audio Config Tab

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Before changing any parameters, check the lower left corner of the PPC3 window, as shown in Figure 23,
to verify that the EVM is connected. If no EVM is detected, the text reads PCM6260 - offline. If the EVM is
detected but does not connect automatically, a Connect button appears. Clicking this button connects the
hardware.
Figure 23. Hardware Connect
When the hardware is connected, the Connect button changes to read Disconnect, and the device is
ready to be configured.
4 Software Overview
The PCM6260Q1EVM control software allows for the configuration of the PCM6xx0Q1EVM-PDK. The
application is organized into three main views: configuration, end system integration, and register map.
These modes are detailed in this section.
4.1 Configuration View
The configuration view, shown in Figure 24, contains all of the tools used to configure and program the
PCM6xx0Q1EVM. This view features tabbed navigation for each of the device configuration panels. These
different tabs are detailed in this section.
Figure 24. Configuration View