Texas Instruments TLV320DAC23 - Manuals

Contents viii 4.4.16 Format Control Button 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4.17 Normal Mode and USB Mode Radio Buttons 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4.18 Clock Select Button 4-7 . . . . . . . . . . ...

1-1 Introduction Introduction The TLV320AIC23 EVM2 is designed to demonstrate the TLV320AIC23 codecor TLV320DAC23 DAC. With the use of the DAREF106R2 parallel portinterface board, the user can control the EVM with a PC. The supplied softwareallows the user to change items such as volume, sample rate...

2-1 Quick Start-Up Quick Start-Up This section explains to the user how to set up the TLV320AIC23 EVM2 quicklyand hear audio using digital loopback. 1) Set the jumpers for the appropriate conditions as explained in Section 3.2 2) Power up the AIC23 (PJ1) per Section 3.3 3) Connect audio source (e.g....

3-1 Theory of Operation Theory of Operation This section provides a comprehensive description and explanation of thevarious features of the TLV320AIC23 EVM2. Topic Page 3.1 Photographs of EVM 3-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Jumper Settings ...

Photographs of EVM 3-5 Theory of Operation Figure 3–4. Parallel Port Interface Board Top View Figure 3–5. Parallel Port Interface Board Bottom View

Jumper Settings 3-6 3.2 Jumper Settings There are two jumpers on the EVM. - JP1 is used to select the communication mode of the EVM. Position 1–2sets the mode for SPI. Position 2–3 sets the mode for I 2 C. The GUI software was developed for I 2 C communication. For SPI the end-user needs to create t...

Digital I/O 3-7 Theory of Operation 3.5 Digital I/O A protected header, J7, is available for interfacing with external digital I/O. Twopower sources, 5 V and 3.3 V, are available on J7 for powering externalboards. The 5-V power is tapped directly off PJ1. The 3.3-V power can supplyup to 100 mA. Sign...

4-1 Software Software This section describes the use of the DASCCT_AIC23 software GUI interfaceto control the TLV320AIC23 EVM2 board. Pictures of the various interfacepanels are shown, and explanations of the control and display elements oneach are provided. Topic Page 4.1 DASCCT_AIC23 Installation ...

DASCCT_AIC23 Installation 4-3 Software Figure 4–1. AIC23/DAC23 EVM2 Connection Diagram Speakers Analog In AIC23/DAC23 EVM I 2 C Connector Audio Out PC CD Player Parallel Port Parallel Port Interface Board

DASCCT_AIC23 Start-Up 4-4 4.2 DASCCT_AIC23 Start-Up 1) Execute the software file named DASCCT_AIC23.exe from the directory where the software was loaded. 2) Click the Master or Slave radio button to select the operating mode. 3) Click the AIC 23 or DAC 23 radio button to select the device. 4.3 DASCC...

Main Panel 4-5 Software 4.4.4 Message Area Directly below the Master and Slave radio buttons on the left side of the mainpanel is a message area. Short text instructions to the operator, statusindications, or error messages can appear in this box. A listing of possible errormessages appears in Chapt...

Main Panel 4-6 4.4.9 I2C Adjust Button Pressing this button opens a panel that allows adjustment of the timing periodused for I 2 C communications between the PC and the EVM. See Section 4.5. 4.4.10 I2C Bypass Check Box This check box allows the user to run the software without a device connectedto ...

I2C Adjust 4-7 Software 4.4.18 Clock Select Button Clicking the Clock Select button opens a panel that allows selection of masterclock speed and ADC and DAC sampling rates (see Section 4.6.11). (Do clockselections correspond to sampling rate register bits?) 4.4.19 Frequency Display Areas In the lowe...

I2C Adjust 4-8 4.6 View Registers The registers panel, shown in Figure 4–4, displays the bits for 10 registers,where the user can either view or change the bit values. There is a PresetModes section of the panel, which allows the user to call up any of three setsof default register settings. A secti...

Audio (Digital) Register 4-11 Software D7–D6 set the sidetone attenuation (00 = –6 dB, 01 = –9 dB, 10 = –12 dB, 11 = –15 dB). D5 sets sidetone enable (0 = disabled, 1 = enabled). D4 sets theDAC select (0 = DAC off, 1 = DAC selected). D3 sets the bypass (0 = disabled,1 = enabled). D2 sets the input f...

Power Down Register 4-12 The Apply button sends the current bit values shown on the Analog Controlpanel to the Audio (Digital) register section of the register panel. The OK buttonperforms the same function as the Apply button and simultaneously closes theregister panel. Figure 4–7. Digital Control ...

Sampling Rate Register 4-13 Software The Apply button sends the current bit values shown on the Analog Controlpanel to the Audio (Format) register section of the register panel. The OKbutton performs the same function as the Apply button and simultaneouslycloses the register panel. Figure 4–8. Forma...

Interface Activate Register 4-14 Figure 4–9. Clock Setup 4.6.12 Interface Activate Register Address: 0001001 D0 activates the digital interface (0 = inactive, 1 = active). Clicking the Send Data button sends only the interface activation data withoutclicking the Apply button.

5-1 I 2 C Error Messages I 2 C Error Messages The error messages are only visible during error conditions. The errormessages are located just above the RESET button in the main panel. The firstmessage to appear will be above the second message. For example, if an ACKerror occurs first then it is dis...

6-1 Kit Contents Kit Contents This chapter contains a list of the contents of the TLV320AIC23 EVM2 kit anda bill of materials for the TLV320AIC23 EVM2 board. Topic Page 6.1 TLV320AIC23 EVM2 Kit Contents 6-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 Bill of Materials 6-3 . . ....

Appendix A Circuit Card and Schematic This appendix contains the following items for the TLV320AIC23 EVM2, in theorder listed: 1) Top silkscreen2) Copper layer 13) Copper layer 24) Schematic diagram Appendix A