ISD-ES521 Nuvoton Technology Corporation of America, ISD-ES521 Datasheet - Page 5

• Manufacturer Part Number: ISD-ES521
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of ISD-ES521

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Introduction to system setup
To quickly get familiar with the system, follow this tutorial that will explain the procedure of setting
up a feed through path from the microphone to the speaker of the main 5216. The main 5216
uses the analog audio connectors on the left side of the board.
The display should now show a single blue path from the microphone to the output. If a speaker
is connected to the speaker output, any sound coming into the microphone will be played back
over the speaker.
The top left corner of the application windows shows the configuration registers, they should look
like in the following picture.
If other values are displayed, restart the application and follow the steps again.
The binary representation of the Configuration Registers at the top of the application window
shows the register content in binary form with bit names used in the data sheet.
There are two other ways to get to the same setup:
Exit and restart the application to get back to the initial state. Go into the Paths menu and
select ‘MIC to Speaker’. This should display an identical setup, press the ‘Write Config’
button to write the data to the chip.
Type the following values in the three text boxes in the top left corner:
Start the ES521 Application from the start menu. The default path is all configuration
registers set to 0.
Set the Aux Gain control to ‘OFF’
Set the SUM1AMP control to ‘OFF’
Set the SUM1MUX to ‘OFF’
Set the SUM2 control to ‘OFF’
Set the CODEC MUX to ‘NONE’
Set the CODEC A/D control to ‘OFF’, this prevents noise from the CODEC.
Set the CODEC D/A control to ‘OFF’, also for preventing noise.
Set the Volume MUX control to ‘INP MUX’
Set the Output Select control to ‘8 Ohm’
Click ‘Write Config’, this updates the main 5216 with this setup.
Figure 2 – Configuration Register settings
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Preliminary