How is the voice of OTP and flash low-cost voice chips written into the chip?

How do OTP and flash low-cost voice chips write voice into the chip. Low cost is a relative

Concepts, such as toy-type products, have simple designs and simple materials, but the manufacturing volume is huge. In addition, there are certain requirements for the quality of voice playback, so the requirements for chips are very high. Low cost due to various reasons.

Usually, various manufacturers that have demand for voice chips also find a suitable point among “ease of use”, stability, service, and cost when selecting models. If you simply require ultra-low cost, you will basically not be able to find suitable chips to manufacture products.

In short, if you want a low-cost voice chip, Geyuan Electronics recommends here:

Voice playback is between 20 seconds and 40 seconds. It is recommended to use an OTP type voice chip.
If it is an application that needs to play 60 seconds, 80 seconds, 120 seconds, 360 seconds, etc., it is recommended to use a flash-type voice chip.

Description of the burning process of two voice chips

Burning of OTP voice chip

Generally, after the OTP chip is designed and cut, it becomes a whole wafer, which is divided into two areas.Program area and voice area, the program area is generally very small, so OTP voice chips can basically only do simple Functions, even complex functional program areas cannot be accommodated.

The voice area is also a fixed area. After the voice is processed through the PC software, it becomes a bin file.
Finally, the program area and the voice area are merged and packaged into a burning file, which is burned into the chip by the burner.

Flash voice chip burning

The Flash-type voice chip is designed to be stacked and packaged together by two chips.The composition structure is dsp+spiflash.

The program area may be placed only in dsp, or it may be placed in spiflash.After powering on, import dsp to run.

The voice area is 100% placed inside the spiflash wafer.
The purpose of this is actually to save costs. After all, spiflash is already extremely standard.Capacity is also optional.

Therefore, the flash-type voice chip must be burned into the built-in spiflash in the end.
However, this type of chip is divided into two download methods:

Similar to GY588F, it is a burner that directly writes 588F. Through the spi interface, it only burns to the built-in spiflash.
Similar to the GY148A chip, it first sends the programming data to GY148A. Then the built-in dsp of GY148A writes to the built-in spiflash according to the specified rules. In fact, it is equivalent to a data transfer.

This advantage is obvious. It can be downloaded in a variety of ways, such as: serial port download, iic download, spi download,Independent second-tier protocol download. All can be implemented very flexibly.

Introduction and features of GY148A

GY148A is a 32-bit DSP voice chip with standard SOP8 package. It has a built-in 420KByte voice space, supports multi-segment voice, and supports direct drive 0.5W speakers, allowing users to change voices. The current advantages of this chip are as follows:

High cost performance. Compared with traditional OTP chips, the improvement of technology greatly reduces the cost. At the same time, the chip can be programmed repeatedly.