Kit Contents; Specification; Device Information - Texas Instruments DEM-PCM2912AEVM User Manual

Evaluation Module Overview
1 Evaluation Module Overview
1.1 Introduction
The PCM2912A is an audio codec with a USB interface for a USB headset, USB headphones, and a USB audio
interface box that integrates mono input, stereo headphone output, an analog loopback line, a programmable
gain amplifier (PGA), and microphone bias. The PCM2912A is available in a 32-pin TQFP package.
The DEM-PCM2912A EVM also carries the Microsoft Windows
Windows Hardware Quality Labs (WHQL). The DEM-PCM2912A has successfully passed the Microsoft WLP
test (DTM Audio) for Windows Vista

1.2 Kit Contents

• PCM2912A device
• DEM-PCM2912AEVM Board

1.3 Specification

The DEM-PCM2912AEVM has a USB-A connector that allows plug-and-play evaluation of the PCM2912A
device. The EVM has some hardware interfacing availability while programming is done via USB from the host
computer.
Figure 1-1 illustrates the functional block diagram of the DEM-PCM2912A EVM.
MBIAS
MIC
Amp
V
IN
V
COM2
V
COM1
V L
OUT
V R
OUT
HP AMP 15 mW (at 32 )
FL
FR
Figure 1-1. DEM-PCM2912A EVM Functional Block Diagram

1.4 Device Information

The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB, 2.0-compliant,
full-speed protocol controller and an analog front-end (AFE) function for headset applications.
2 DEM-PCM2912A Evaluation Module
® x86/x64 platforms.
BGND
V
REF
MIC
PGA +30 dB to
Bias
- 12 dB
in 1-dB steps
ADC
ATT 0 dB to 76 dB -
in 1-dB steps with Mute
S
DAC
S
W
ATT 0 dB to 76 dB
-
in 1-dB steps with Mute
PLL (x16)
6.000 MHz
XTI XTO
Copyright © 2024 Texas Instruments Incorporated
® Logo License certification from the Microsoft
V /V /V /V /V AGND/HGND/PGND/DGND
CCA CCP CCL CCR DD
Power
5 V to 3.3 V
Manager
Voltage
Regulator
ISO-in
FIFO
endpoint
Selector
Control
Analog
endpoint
PLL
Analog
PLL
Selector
ISO-out
FIFO
endpoint
USB protocol
controller
Tracker
96 MHz
â
(SpAct )
SBAU141A – JANUARY 2009 – REVISED APRIL 2024
www.ti.com
SSPND
V
BUS
D+
XCVR
D-
USB SIE
POWER
MAMP
MMUTE
PLAY
REC
TEST0
TEST1
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