SBAU141A January   2009  – April 2024 PCM2912A

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Pin Assignments and Terminal Functions
    2. 2.2 Interface and Connections
  9. 3Software
    1. 3.1 Software Setup Guide
      1. 3.1.1 Basic Operating Setup for Windows 10
        1. 3.1.1.1 Basic Setup Before Evaluation
        2. 3.1.1.2 Volume and Mute Settings
        3. 3.1.1.3 Sampling Frequency
      2. 3.1.2 Basic Operating Setup for Mac OS
        1. 3.1.2.1 Basic Setup Before Evaluation
        2. 3.1.2.2 Volume Settings
        3. 3.1.2.3 Sampling Frequency
  10. 4Implementation Results
    1. 4.1 Evaluation Setup
    2. 4.2 Performance Data and Results
      1. 4.2.1 Measurements for Dynamic Characteristics
      2. 4.2.2 Playback Performance
      3. 4.2.3 Recording Performance
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Related Documentation
  14. 8Revision History

Pin Assignments and Terminal Functions

Figure 3-1 shows the pin assignments for the PCM2912A. Table 3-1 lists the terminal functions.

GUID-1D3A50C2-5B6B-4875-95FB-B4D7712121FB-low.gif Figure 2-1 PCM2912A Pin Assignments
Table 2-1 PCM2912A Terminal Functions
Name TQFP-36
Terminal
I/O Description
BGND 1 Reference for internal regulator
VBUS 2 Connect to USB power (VBUS)
D– 3 I/O USB differential input/output minus
D+ 4 I/O USB differential input/output plus
VDD 5 Digital power supply
DGND 6 Digital ground
XTO 7 O Crystal oscillator output
XTI 8 I Crystal oscillator input
FL 9 External filter pin of left channel (optional)
FR 10 External filter pin of right channel (optional)
VCOM1 11 Common voltage for ADC, DAC and analog front-end (VCCA/2). Decoupling capacitor is connected to AGND.
VCOM2 12 Common voltage for headphone (VCCA/2). Decoupling capacitor is connected to AGND.
AGND 13 Analog ground
NC 14 Not connected
VCCA 15 Analog power supply
VIN 16 I ADC microphone input
MBIAS 17 O Microphone bias output (0.75 VCCA)
VOUTL 18 O Headphone output for L-channel
VCCL 19 Analog power supply for headphone amplifier of L-channel
HGND 20 Analog ground for headphone amplifier
VCCR 21 -– Analog power supply for headphone amplifier of R-channel
VOUTR 22 O Headphone output for R-channel
MAMP 23 I Microphone preamplifier gain control (LOW: Preamplifier off; HIGH: Preamplifier on = +20 dB)
POWER 24 I Power consumption declaration select pin (LOW: 100 mA; HIGH: 500 mA)
PGND 25 Analog ground for microphone bias, microphone amplifier, and PGA
VCCP 26 Analog power supply for PLL
TEST1 27 I Test pin. Must be set to high.
TEST0 28 I Test pin. Must be set to low.
SSPND 29 O Suspend flag (LOW: Suspend; HIGH: Operational state)
MMUTE 30 I Microphone mute control, active high (LOW: Mute off; HIGH: Mute on)
REC 31 O Status output for record (LOW: Record; FLASH: Mute on record; HIGH: Stop)
PLAY 32 O Status output for playback (LOW: Playback; FLASH: Mute on playback; HIGH: Stop)