Micro speech synthesis module based on SYN6288

* This project is to verify the speech synthesis chip SYN6288 of [Lichuang Mall](https://www.szlcsc.com/index.html) ([Mall No. c123765](https://item.szlcsc.com/125037.html) ) scheme verification board design.
* This project participates in [EDA Open Source Hardware Platform](https://oshwhub.com/)[Solution for Solution Verification Module](https://oshwhub.com/rewards/f4bbab6365034e80aadb8f8ebf77c846)

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* This design is a Speech synthesis module module based on SYN6288.
* SYN6288 is a widely used and low-cost speech synthesis chip
* The circuit designed includes the SYN6288 chip and necessary peripheral circuits. The input voltage of the circuit is 3-5v. The output BN and BP can directly drive the micro-speaker and be used in the array. On the basis of the pin interface, stamp hole SMT pads are added to facilitate rapid integration into other development boards

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* The next step will be PCB board proofing, and then the PCB blank board photos, soldering finished product photos, and program testing will be updated
* Stamp holes The SMT pad file is in the attachment

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updated proofing was back on 2020/3/2
(actually it has been done for a long time, but I was busy with online classes and did not have time to send it out). Then I took out the components and
prepared the components for welding and the empty board:
![IMG_20200217_110258.jpg] Tin one of the pads of the chip component with a blank board
![IMG_20200217_110804.jpg] Solder the components except the main chip
![IMG_20200217_112059.jpg] Finally solder them (please ignore the flux and too much Too much tin, due to the epidemic, the solder paste I bought did not arrive.)
![IMG_20200217_112706.jpg]
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Then, power on, connect the serial port, and send. . . It didn't make any sound. . .
All the components were measured and there were no problems. The noise floor of the power amplifier inside the module could also be heard from the speakers.
So I checked the datasheet and found that the input needs to be connected to an inverter. . .
Put three components on it, power it on, and it's finally ready to use
. Here's what it looks like in the end. . .
![IMG_20200302_110327.jpg] However, the above schematic diagram has been updated and can be used directly.
Since this is a serial port module, you can test
the serial port without a microcontroller at a baud rate of 9600. Just send hexadecimal numbers
. Chinese characters one or two. Data of 34567890:
FD 00 17 01 00 D2 BB B6 FE C8 FD CB C4 CE E5 C1 F9 C6 DF B0 CB BE C5 CA AE 9E. For
the specific data composition, please refer to [Official Document] (https: //atta.szlcsc.com/upload/public/pdf/source/20170810/C123765_1502335211916879745.pdf?Expi res=4070880000&OSSAccessKeyId=LTAIJDIkh7KmGS1H&Signature=It9CIvHiONcDts2bB%2B%2Bx2M3Eg1s %3D&response-content-disposition=attachment%3Bfilename%3DC123765_SYN6288_2017-08-10. PDF)