ISD-ES521 Nuvoton Technology Corporation of America, ISD-ES521 Datasheet - Page 7

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

Specifications of ISD-ES521

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Configuration Registers
The ISD5216 is a very versatile chip where the analog audio signal can be routed and processed
in a variety of ways. Writing to three configuration registers sets up the internal path.
To aid the setup of the signal paths, the available paths are displayed graphically and the
currently selected path highlighted in blue while the available but inactive paths are shown in
gray.
An arrow is only highlighted if there is a signal at the input end, and the signal can be accepted at
the other end. The easiest way to setup a path is from the signal input towards the output.
There are a number of ways to set up the path of analog audio, Note: The configuration
registers are not actually written to the chip until the ‘Write Config’ button is pressed:
1. The controls on the main application window can be used to setup any path through the
2. A value can be typed directly into the configuration register boxes. Pressing the load
3. The ‘Paths’ menu contains stored paths that will setup a given configuration. It is possible
The currently selected configuration is displayed in three ways:
The buttons used for configuration register setup is:
Load - Update the current configuration with the settings in the textboxes in the top left
corner
Write Config – Write the settings currently selected to the chip.
Chip Select – Choose whether to use the main or secondary board
system. Set all controls so that the desired path is highlighted and click ‘Write Config’ to
write the configuration to the chip. An arrow is only highlighted if there is a connection at
both ends of the arrow. To setup a configuration, start from the input and move towards
the outputs. For example, the paths to the CODEC will not be highlighted unless the A/D
converter is switched on.
button will update the graphics on the main display. The configuration register setup
should be written in hex numbers.
to add and remove paths from this menu to save commonly used paths.
Graphically by highlighted arrows.
A hexadecimal number labeled ‘CFG0’, ‘CFG1 and ‘CFG2’
A binary number with the bit labels used in the datasheet
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Preliminary