Smart lock voice prompt chip selection OTP or flash

Smart door locks are favored by modern people with their intelligent advantages in user identification, security, and management. Its appearance design also follows modern trends.

At present, all smart locks on the market will basically have a voice prompt function, making it simple and convenient for users to operate.

Security protection is mainly reflected in the fact that an alarm sound can be added to the smart lock, and an alarm will sound when the password input or fingerprint input is incorrect multiple times in a row. The humanization aspect is mainly reflected in the ability to give voice prompts, so that the elderly or children can feel that they are not confused when opening the lock. In addition, it can also prevent them from worrying about forgetting to bring the key or losing the key.

What is a smart lock voice chip?

Generally, smart locks will be equipped with a GY148A voice chip to realize the voice prompt function. Engineers can customize the content according to the needs of the smart lock, such as “Please enter your password.” “Please enter your fingerprint.” “Unlocked successfully.” and other voice prompt content, especially if you can Customize the malfunction alarm and lock-picking alarm content in the chip. When the smart lock is damaged by external violence or is unlocked abnormally, an alarm will automatically sound to remind the householder.

Voice chip application characteristics of smart locks

Smart lock is a very mature and stable product type. Its requirements for voice chips basically focus on the following points:

It must be easy to use and easy to proof, because most locks are developed by solution companies and then purchased and assembled with PCBAs. Therefore, there are many product types, so the voices will be different. Frequent proofing affects development efficiency.
The power consumption must be low, especially for battery-powered application scenarios.
The cost should be low. After all, in an increasingly crowded market, cost is king.

Here we strongly recommend the GY148A-sop8 voice chip, which is flash type and can be reburned. The user can modify the voice by himself. Of course, in response to the demand for smart locks, we have also developed practical functions.

Expand voice beyond the 255 address range. Many OTP chips can only support a maximum address of 255, while the flash GY148A can be extended to an address range of 65535.
The ultimate voice compression can store nearly 440 seconds of high-quality sound. If the sound quality is slightly compressed, it can be stored for 600 seconds, but you need to make a sound quality trade-off.

The biggest advantage of the Flash-type voice chip is that there is only one type of chip and there are no other models. There is no need to distinguish between boring chips and no need to worry about inventory. There are many benefits.

What are the features and advantages of the GY148A flash chip?

GY148A is a 32-bit DSP voice chip with standard SOP8 package. It has a built-in 420KByte voice space, supports a maximum voice length of 420 seconds, supports multiple voices, 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, and the chip can be programmed repeatedly.
Users can change the sound by themselves through the serial port on the computer without the need for other expensive tools.
The chip comes with enough space to pursue higher sound quality.

The new F4 command is added as follows

4.5 Communication command F4 description: Voice address expansion

The significance of the F4 command is that after the number of voices exceeds 223, there is no address available, so this command is added. for example:

If you specify to play the voice of address 291, send F40123 [01=0x01 high byte] [23=0x23 low byte]. Among them, F4 is the identification code, and 0123 consists of bits 0x123=291, which represents the 291st voice playback.
If you specify to play 291 voices, send F4, 04, 98. Send F40498, in which 0498 constitutes bit 0x498=1176, which represents the 1176th voice playback.
The length of this F4 command can only be three bytes [no more nor less]. After F4, 01, and 23 are filled, playback will start immediately.
When the chip receives the F4 command, it will automatically wait for 100ms. If it receives a voice command such as 0x0l within this 100ms, it will continue to wait for another 100ms. If the second address data 0x23 is received, it means that it is full = 0x0123, and the 291 address voice will be played immediately. If the address data has not been received for more than 100ms, it is considered that the communication failed this time because only x1 was received.
If the voice address does not exceed 233, you do not need to use this extended command.

The significance of the F4 command is that after the number of voices exceeds 223, there is no address available, so this command is added. for example:

To specify the voice playback address of 291, send F4 01 23, where 01 is 0x01 representing the high byte, and 23 is 0x23 representing the low byte.

F4 is the identification code, 01 and 23 form the bit 0x123 = 291, which represents the 291st voice address.

If you specify to play 1176 voices, send F4 04 98.

Send F4 04 98, where 04 98 constitutes bit 0x498 = 1176, representing the 1176th voice playback.

This F4 command can only be three bytes, no more or less. After F4 01 23 is filled, playback will start immediately.

Dongguan Geyuan Electronics Co., Ltd. is a high-tech company specializing in the research and development and sales of voice chips. All personnel have profound industry backgrounds. The company is engaged in voice chip research and peripheral circuit development; at the same time, we formulate voice product development plans for customers with special needs, and implement the plans to complete product development, testing, sound processing, and a series of services including product practical application guidance. . The business scope involves automotive electronics (such as reversing radar\anti-theft devices), multimedia (such as advertising machines), home anti-theft (such as voice prompts), toys, electronic products, etc.