Is the built-in 320KByte memory of the KT142C voice chip insufficient? Are there other solutions?

Question: Is the built-in 320KByte memory of the KT142C voice chip insufficient? Are there other solutions?

The KT142C voice chip comes with 320KBytes of built-in memory. You can find detailed information about this in Section 4.3 of the chip manual, as shown in the diagram below.

Here's a detailed explanation of why it's 320KBytes:

Although the KT142C chip has a total internal memory of 512KBytes, part of it is used for firmware storage, and another portion is reserved for system memory management. The remaining space—about 320KBytes—is available for the user to replace and store custom voice data. Unfortunately, there isn't any additional free space to expand within the chip itself.

If 320KBytes is not sufficient for your application, the only option is to choose a design with external Flash memory. In this case, the available voice storage capacity depends entirely on the size of the external Flash chip you use.

• Advantage: Storage space can be expanded freely.
• Disadvantage: It requires adding an extra Flash chip, which slightly increases the component cost.

For details, you can refer to the KT142F-SOP16 chip solution.