Texas Instruments DEM-PCM2912A EVM 1.3 Functional Block Diagram

1.3 Functional Block Diagram

XTI XTO

6.000MHz

96MHz

PLL(x16) Tracker

(SpAct )

USBprotocol

controller

ISO-out

endpoint

Control

endpoint

ISO-in

endpoint

FIFO

FIFO XCVR

Selector

Analog

PLL

Analog

PLL

USBSIE

VREF

5Vto3.3V

Voltage

Regulator

Power

Manager

ADC

DAC

MIC

Bias

MIC

Amp

BGND V /V /V /V /V

CCA CCP CCL CCR DD AGND/HGND/PGND/DGND

SSPND

VBUS

D+

D-

POWER

MAMP

MMUTE

PLAY

REC

TEST0

TEST1

MBIAS

VIN

VCOM2

VCOM1

V L

OUT

V R

OUT

PGA+30dBto

12dB

in1-dBsteps

ATT0dBto 76dB

in1-dBstepswithMute

ATT0dBto 76dB

in1-dBstepswithMute

HPAMP15mW(at32 )W

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Functional Block Diagram

Figure 1-2 illustrates the functional block diagram of the DEM-PCM2912A EVM.

Figure 1-2. DEM-PCM2912A EVM Functional Block Diagram

SBAU141 – January 2009 Description 13Submit Documentation Feedback

Contents

Main Page Contents Page Page Page Preface Read This First Page Chapter 1 Description 1.1 IntroductionPCM2912A 1.1.1 Key Features 1.2 Pin Assignments and Terminal Functions PCM2912APJT (TopView) Pin Assignments and Terminal Functions Figure 1-1 shows the pin assignments for the PCM2912A. Table 1-1 lists the terminal functions. Figure 1-1. PCM2912A Pin Assignments Table 1-1. PCM2912A Terminal Functions Table 1-1. PCM2912A Terminal Functions (continued) 1.3 Functional Block Diagram www.ti.com SBAU141 January 2009 Description 13Submit Documentation Feedback Functional Block Diagram Figure 1-2 illustrates the functional block diagram of the DEM-PCM2912A EVM. Page Chapter 2 Getting Started 2.1 Electrostatic Discharge Warning Electrostatic Discharge Warning 2.2 Block Diagram 2.3 Interface and Connections Chapter 3 Set-Up Guide Page 3.1.2 Volume and Mute Settings Page Page Page Page 3.2.2 Volume Settings Page Page Page Page 3.3.2 Volume Settings 3.3.3 Sampling Frequency Page Page Chapter 4 Evaluation and Measurements 4.1 Measurements for Dynamic Characteristics 4.2 Playback Performance Playback Performance Table 4-1. Line Output Playback Performance Table 4-2. 32- Headphone Output Playback Performance Table 4-3. 16- Headphone Output Playback Performance 4.3 Recording Performance Chapter 5 Schematic, PCB Layout, and Bill of Materials Page Page 5.3 Component List Component List Table 5-1 lists the bill of materials for the DEM-PCM2912A EVM. Table 5-1. Bill of Materials Page Page IMPORTANT NOTICE