KT148A voice chip ic working principle and internal architecture description of the chip

目录

一、芯片简介

 二、管脚说明

1、供电的注意事项：

2、快速测试说明：

3、测试注意事项：

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一、芯片简介

1、It is used inside the chip MCU + spiflash架构,are stacked and packaged together,That is, two wafers are enclosed in one chip

2、其中MCUis specifically responsible for the control,而spiflash,Is dedicated to storing audio data for use,and running the code

So this creates the characteristics of the chip,is relatively low cost,Especially in the application scenario of long speech,优势就很明显.但是缺点也很明显,His cost is still lower than that of TaiwanOTP芯片,尤其在20In the application scenario of about seconds

3、芯片内部的MCU最高可以跑120MHZ,是基于risc架构的32 位 DSP 语音芯片、5MHZ的内部振荡,PLL到120MHZ;具有硬件 iic接口、UART 接口,可以为客户定制各类功能.

4、Because the chip is only8个脚,所以可用的ioMouth is very limited,But the resources inside the chip are actually not bad at all

Of course the same series,还有QSOP24封装的,也有SOP16封装的

1. It is very flexible in use,It all depends on the specific needs of the customer,以及实际的应用场景

1. And our default chip programming is the one-line serial port control method,That is matchingMCU使用的场景,MCU作为主机,KT148A作为从机,This is used in combination

 ​​​​​​​二、管脚说明

 

 

1、供电的注意事项：

==》建议给芯片的供电,做到5V供电,电压越高芯片驱动喇叭的功率也越高,声音也越大

==》如果是[3.3--4.2V]锂电池的场景,电源正极直接进芯片的8脚即可

==》如果是干电池的供电场景,电源正极也是直接进芯片的8脚

==》如果需要超低电压供电,如2V--3V之间的纽扣电池,建议芯片的7脚和8脚直接短路,再连接电源正极

2、快速测试说明：

==》连接好扬声器,然后供电之后,就可以用第4脚对地测试了

==》芯片的是第4脚为测试脚,外接一个按键或者镊子对地触发一下,就会播放下一个语音,Keep pressing to play the next one

3、测试注意事项：

==》连接MCU的时候,Put a resistor in series as much as possible,保持100欧姆即可,也就是KT148A的3脚[1线通讯] 和 MCU之间

==》At the same time try tobusy的脚,连接到MCU的IO口,This lets you know if the chip is playing,and whether it has finished playing.测试脚【4脚--PB0】可以悬空