Vs1053 gbuf Unused l ould be connected to IOVDD and TX be uncon Feb 2, 2023 · Your ESP32 is a 3. Apr 23, 2024 · VS1053是一款音频编解码器芯片，GBUF引脚是其内部模拟信号的输出端。在某些情况下，GBUF引脚可以悬空，但这取决于具体的应用和设计。 首先，我们来了解一下原子哥的VS1053模块中GBUF引脚的连接方式。原子哥的VS1053模块中的GBUF引脚通过一个电阻连接到GND，这种设计可能是为了实现某种特定的功能或 Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2174 Joined: Thu 2010-07-15 14:04 Apr 26, 2017 · VS1053 has 3 output lines, LEFT, RIGHT and GBUF. Multiplier 3:5 . 5A) dc wall outlet adapter? GND : VS1053 GND D3 (SoftSerial TX) : VS1053 RX D4 : VS1053 RESET Attach a headphone breakout board to the VS1053: VS1053 LEFT : TSH VS1053 RIGHT : RSH VS1053 GBUF : GND To play the different sounds, select an instrument # like 5, then play notes 27 to 87. Apr 19, 2012 · For GBUF, GPIO0 and GPIO1, I am not connecting anything to the pins. Fortunately this will trigger the driver protection circuit and turns off the analog Jul 1, 2011 · for debugging to the terminal window. Below: v2. T be connected to ground under any circumstances. This VLSI codec chip is part of the company’s slave audio processor family, and it has a versatility advantage because you can load software into the chip RAM to expand its functionality. What happens if I tie the audio ground to View datasheets for VS1053 Tutorial by Adafruit Industries LLC and other related components here. Above: v1. For purposes of this discussion, I’m only concerned with the R channel. Can I connect the SMD-Speakers (500-800mW) directely to LEFT and RIGHT, or do I have to implement an amplifier like this one: MAX98306? GBUF must NOT be connected to ground under any circumstances. The PAM8403 breakout board that I'm using has a resistor divider in the input (10k/10k) and a blocking capacitor (1uF) connected between that resistor divider and its audio input. adafruit. I have the GBUF output floating. 20000 Hz, analog output load: LEFT to GBUF 30 , IGHT to GBUF 30 . YesH QQ技术支持群:275897936 VS1053b - Ogg Vorb Oct 6, 2007 · vs1053电路大多数是接耳机的，如何接外放喇叭呢，vs1053接耳机并不跟其他一样，一个左声道和地，右声道和地，它有一个专门的参考电压GBUF，两个声道是left和GBUF，right和G ,VS1053声音外放实现,音频应用 May 12, 2017 · DO NOT connect GBUF to an external amplifier's ground. Microphone test amplitude 48 mVpp, fs=1 kHz, Line input test amplitude Re: Can I use GBUF with this setup? by Hanzibal » Mon 2011-03-14 20:14 Maybe you could do with the vs1053 alone. The shield uses the VS1053 codec. SS_VCM_OVERLOAD is high while the overload is detected. Oct 3, 2012 · VS1053外接扬声器功放-最近想做个VS1053的MP3，外接TPA2008D2扬声器功放，关于VS1053的输出查了好多资料，现在有几个问题想跟大家探讨下。 See full list on cdn-learn. (The vs10xx DAC is actually inverting. 5V : VS1053 VCC GND : VS1053 GND D3 (SoftSerial TX) : VS1053 RX D4 : VS1053 RESET Attach a headphone breakout board to the VS1053: VS1053 LEFT : TSH VS1053 RIGHT : RSH VS1053 GBUF : GND When in the drum bank (0x78), there are not different instruments, only different notes. 0 codec board This breakout board is the ultimate companion for the VLSI VS1053B DSP codec chip. Last edited by madias on Sat 2018-11-03 17:19, edited 1 time in total. To keep GBUF stable, you should always have the esistor and capacitor even when GB nused GPIO pins should have a pull-down resistor. It lists hardware and soft-ware differencies and other considerations. The only solution to get rid of the digital noice was to connect the amp ground to GBUF. You can do all sorts of stuff with the audio as well such as adjusting bass, treble, and volume digitally Dec 3, 2015 · vs1053电路大多数是接耳机的，如何接外放喇叭呢，vs1053接耳机并不跟其他一样，一个左声道和地，右声道和地，它有一个专门的参考电压GBUF，两个声道是left和GBUF，right和GBUF,接耳机的电路如下图所示经过测试，要接外放两根线分别接left或者right和GBUF就好了 GBUF 在任何情况下都不允许连接到地线上。 如果不使用GBUF,则左通道和右通道必须要使用耦合电容器。 要保持GBUF 的稳定,即使不用GBUF,你也应该总是使用这些电阻和电容。 请参看应用指南中的详细注意事项。 没有使用的GPIO引脚应该接一个下拉电阻。 GBUF must NOT be connected to ground under any circumstances. png (191. In order to see the input signal, somehow the op amp and VS1053 must have a common reference. 2V to GND, which causes vs10xx to drive a large current. On the 'good' board, the GBUF, MICP and TX are silent, but on the 'bad' board they are not! I attached a pdf with scope images of GBUF and MICP: vs1053 problem 2. 1k次，点赞21次，收藏16次。通过本文的介绍，相信读者对VS1053音频模块有了更深入的了解，在实际应用中能够更好地发挥其优势，为音频项目的开发提供有力支持。它集成了音频解码、音频处理、音频放大等多种功能，可以实现对多种音频格式的解码播放，如MP3、WMA、WAV、FLAC等。它 ATK-VS1053 MP3 模块通过 SPI 接口与外部控制器连接，VS1053（即本模块）的控制 以及音频数据，都是通过 SPI 接口，VS1053 通过 7 根信号线同控制器，分别是：RST、XCS、 XDCS、SI、SO、SCK 和 DREQ。 Jul 15, 2009 · any news on this? I am also thinking about a project based on the VS1053. DAC tested with 1307. VS1053的GBUF引脚可以悬空吗？ -原子哥的VS1053模块中的GBUF引脚是接了个电阻之后直接连到GND上了，而datasheet上却说不允许连接到地线上，为什么结果VS1053模块还是可以正常工作的？ Overload means that the GBUF driver pushes as much current as it can into the short circuit as it tries to pull GND to 1. -Panu Info: Line In and Line Out, VS1000 User interface, Overlay howto, Latest VSIDE, MCU Howto, Youtube Panu-Kristian Supporting the VS1053 is a µSD card socket, which you can use to store MP3 files on. The VS1053 can decode a wide variety of audio formats such as MP3, AAC, Ogg Vorbis, WMA, MIDI, FLAC, WAV (PCM and ADPCM). Datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. Feb 6, 2012 · At the same time data from vs1053 is shifted to the same register. Learn how to use the VS1053 with detailed documentation, including pinouts, usage guides, and example projects. Because I am an absolute beginner, I wanted Arduino to be the base for my first experiments, but I would prefer to know if it works at all before I buy an Arduino Board. Mar 11, 2011 · Can I use GBUF when connecting line out (headphone connectors) of vs1053 to a class D amplifier, provided I feed everything from the same 12v (1. 97 KiB) Downloaded 1025 times May 9, 2017 · VS1053 has 3 output lines, LEFT, RIGHT and GBUF. Using the Arduino SD library, it's simple to read music files off an SD card, and stream them to the VS1053B. 20000 Hz, analog output load: LEFT to GBUF 30 , RIGHT to GBUF 30 . In different official evaluation boards there are two possible designs: snip_20220317220035. talkMIDI(0xB0, 0, 0x78); //Bank select: drums talkMIDI(0xC0, 5, 0); //Set instrument number Jan 22, 2019 · 原子哥的VS1053模块中的GBUF引脚是接了个电阻之后直接连到GND上了，而datasheet上却说不允许连接到地线上，为什么结果VS1053模块还是可以正常工作的？ VS8053b contains GBUF protection circuit which disconnects the GBUF driver when too much current is drawn, indicating a short-circuit to ground. But line out is referenced to the audio ground created by the VS1053. Microphone test amplitude 48 mVpp, fs=1 kHz, Line in Dec 7, 2017 · I'm using to amplify the audio an PAM8610 module amplifier bought in eBay, like discussed before, the Vs1053 audio output is not referenced to ground but to GbuF and it cannot be grounded. Since you only use mono, maybe you could have different sounds in each of the two channels as stereo input to the vs1053 and then adding them together analoguewise afterwards. I imagine this ground and GBUF connected do that. 3V device. Unused l ould be connected to IOVDD and TX be uncon Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2203 Joined: Thu 2010-07-15 14:04 VS1053_MP3模块用户手册. the analog signal in the processing circuitry is measured w. Sep 23, 2013 · Supporting the VS1053 is a μSD card socket, which you can use to store MP3 files on. I know (by now) using a Class D amp isn't the best solution dealing with a VS1053, but I ordered 15+ pieces for a player I have to make in a small series. ground of a ±12VDC supply. There's additional circuitry on-board to level shift signals down to the 3. Unless your player is on battery operation (so that the GND of the player is not connected to GND of the amplifier), it causes the GBUF to drive 1. Let’s cover the features and functionality of this MP3 decoder chip below to learn more about it VS1053b contains GBUF protection circuit which disconnects the GBUF driv er when too much Jun 28, 2023 · I have it! I was using the wrong I2s object (AudioInputI2S2 instead of AudioInputI2S). Dec 26, 2013 · for debugging to the terminal window. An early circuit connected the audio signal ground to the circuit ground. >>What is the byte order of your architecture? You have int cmd = 0x0300; char *p = &cmd; what does p [0] and p [1] contain? When you write to p [0] (*p = 0;), does it overwrite the read command 0x03 or register address 0x00? Jul 9, 2019 · I’m using the Sparkfun Music Maker shield, and I’m taking the line out output. com Jul 7, 2023 · I'm not using the GBUF signal from the VS1053, which in their data sheet describes thusly: The common buffer GBUF can be used for common voltage (1. 83 KiB) Viewed 3904 times T be connected to ground under any circumstances. To keep GBUF stable, you should always have the resistor and capacitor even when GBUF is not used. Those pins are NOT 5V tolerant but you are connecting them to the shield which is designed for a Uno (5V device) Feb 20, 2020 · Browsing the internet I found a solution to remove noise and ground loop audio problems when useing the vs1053 dac board with an external audio amplifier. 23 V) for earphones. 0 codec board. As an alternative we can reference the 2 output GBUF must NOT be connected to ground under any circumstances. It combines an MP3 decoder, volume control, and headphone amplifier in a single IC. Description This document describes how to migrate from VS1003 to VS1053. This eliminates the need for large isolation capacitors on line outputs, and thus the audio output pins from VS1053b may be connected directly to the earphone connector. Joerg system January 28, 2010, 4:26pm 7 i am a bit confused finding the best way to feed a class D amplifier from the LEFT/RIGHT/GBUF output of a VS1053B. 894 Hz full-scale output sinewave, measurement bandwidth 20. The VS1053 can decode a wide variety of audio formats such as MP3, AAC, Ogg Vorbis Can I use GBUF when connecting line out (headphone connectors) of vs1053 to a class D amplifier, provided I feed everything from the same 12v (1. The GBUF pin in Atom Brother's VS1053 module is directly connected to GND after connecting a resistor, but the datasheet says that it is not allowed to be connected to the ground wire. It's the heart of many small MP3 Players. Can I use GBUF when connecting line out (headphone connectors) of vs1053 to a class D amplifier, provided I feed everything from the same 12v (1. Why can the VS1053 module still work normally? If I don't connect anything to the GBUF pin and just leave it floating, what will be the impact in the end? 1. Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2123 Joined: Thu 2010-07-15 14:04 Dec 17, 2023 · pdf 10 pdf 11 ` 左右声道 负载，注意这里的负载指LEFT 到GBUF,RIGHT到GBUF。所以后面会有说明GBUF一定不能连接到GND。 pdf 14 pdf 14 从上面的引脚定义图大致能看出使用方法， SPI总线 （SCLK SDO SDI） 芯片选择--> XCS 芯片数据选择--> XDCS 芯片数据请求--> DREQ 芯片复位-->XRESET pdf 16 Figure 3 是典型应用图，最后的Note SM Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2164 Joined: Thu 2010-07-15 14:04 Jan 22, 2019 · 原子哥的VS1053模块中的GBUF引脚是接了个电阻之后直接连到GND上了，而datasheet上却说不允许连接到地线上，为什么结果VS1053模块还是可以正常工作的？ Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2187 Joined: Thu 2010-07-15 14:04 Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2185 Joined: Thu 2010-07-15 14:04 Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2183 Joined: Thu 2010-07-15 14:04 Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2177 Joined: Thu 2010-07-15 14:04 Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2174 Joined: Thu 2010-07-15 14:04 Re: VS1053 feeding class D amplifier - how to handle GBUF? by SJS » Fri 2022-03-18 14:47 looking again, it is not as easy: For DC coupling, the LEF/RIGHT is routed to the positive input of the amp, for AC coupling the negative input of the amp is used pasi VLSI Staff Posts: 2186 Joined: Thu 2010-07-15 14:04 Oct 11, 2023 · The VS1053 is a versatile decoder that reads MP3, AAC, WAV, MIDI, FLAC, WMA, and Ogg Vorbis audio formats. This helped me out a ton. Apr 15, 2018 · pdf 10 pdf 11 ` 左右声道 负载，注意这里的负载指LEFT 到GBUF,RIGHT到GBUF。所以后面会有说明GBUF一定不能连接到GND。 pdf 14 pdf 14 从上面的引脚定义图大致能看出使用方法， SPI总线（SCLK SDO SDI） 芯片选择--> XCS 芯片数 GBUF must NOT be connected to ground under any circumstances. Don't use the GBUF signal as ground with an external amp because its for the headphone Oct 29, 2018 · The problem is that the noise (like SPI handling) is independent from the main volume, so it's always "there". My life is substantially improved! Thanks for your responses and advice, @JayShoe! I have not connected the GBUF from the vs1053 to anything on the Audio Shield. Perfect for students, hobbyists, and developers integrating the VS1053 into their circuits. But have you taken into account that GBUF pin of VS1053 is at 1. If I were to instead take the analog output of the the VS1053 and pipe it into the Teensy 4x How would I connect the three pins (Right, Left, GBUF)? The VS1053 data sheet say GBUF is a "Common buffer for headphones, do NOT connect to ground!" "GBUF must NOT be GBUF must NOT be connected to ground under any circumstances. 5A) dc wall outlet adapter? What else do I need in terms of resistors and/or capacitors between the vs1053 and the amp? Thanks!. According to the Sparkfun documention, GPIO0 and GPIO1 should be tied to ground with a 100kOhm resistor and GBUF should not be connected to ground but does have a RC circuit to ground per the vs1053b documentation (my own design does the same so I would be interested in The module with the VS1053 also uses the same supply connections. What is it that the digital noise cant pass the GBUF, but will reach GND? Oct 1, 2010 · I tested the pins of both boards and there is a difference. Jan 22, 2019 · 原子哥的VS1053模块中的GBUF引脚是接了个电阻之后直接连到GND上了，而datasheet上却说不允许连接到地线上，为什么结果VS1053模块还是可以正常工作的？ 那如果我GBUF引脚什么都不接，直接让它悬空，那最后会有什么影响吗？ Apr 14, 2015 · VS1053 has 3 output lines, LEFT, RIGHT and GBUF. pdf (432. Mar 17, 2022 · Re: VS1053 feeding class D amplifier - how to handle GBUF? by pasi » Sat 2022-03-19 10:14 Does it matter if the amplifier output gets inverted? You should be able to use either negative or positive input of the amp for the signal whether you use single-ended (with GND) or differential (with CBUF) connection. If GBUF is not used, LEFT and RIGHT must be provided with coupling capacitors. You can do all sorts of stuff with the audio as well such as adjusting bass, treble, and volume digitally May 25, 2013 · Adafruit Industries, Unique & fun DIY electronics and kits VS1053 Codec + MicroSD Breakout - MP3/WAV/MIDI/OGG Play + Record [v4] : ID 1381 - This breakout board is the ultimate companion for the VLSI VS1053B DSP codec chip. 5A) dc wall outlet adapter? What else do I need in terms of resistors and/or capacitors between the vs1053 and the amp? Thanks! This breakout board is the ultimate companion for the VLSI VS1053B DSP codec chip. 6mm，并带有安装孔位，小巧精 Aug 9, 2019 · The analog source signal is measured w. It contains a high-performance, proprietary low-power DSP processor core VS_DSP4, working data mem-ory, 5 KiB instruction RAM and 0. This will eliminate the need for large isolation capacitors on line outputs, and thus the audio output pins from VS1053b may be connected directly to the earphone connector. Is there any need to use this GBUF signal in Hmm, there's no VS1053 in that schematic, so it's difficult to say why it does not work. See application notes for details. 5A) dc wall outlet adapter? What else do I need in terms of resistors and/or capacitors between the vs1053 and the amp? Thanks! Can I use GBUF when connecting line out (headphone connectors) of vs1053 to a class D amplifier, provided I feed everything from the same 12v (1. Jun 28, 2023 · The VS1053 has two kinds of output I2S (as Master) and analog, which I have used for a headphone jack (and has kind of wimpy output). 3V maximum allowable by SD cards. Line output consist of a L & R output, plus an audio ground. What i notice is Nov 1, 2024 · 文章浏览阅读2. Unused GPIO pins should have a pull-down resistor. Thanks a lot in advance for any answer. 3 volts and not at Ground? If you connect GBUF to Ground, the short-circuit protection will shut down the analog drivers. Can I connect the SMD-Speakers (500-800mW) directely to LEFT and RIGHT, or do I have to implement an amplifier like this one: MAX98306? 原子哥的VS1053模块中的GBUF引脚是接了个电阻之后直接连到GND上了，而datasheet上却说不允许连接到地线上，为什么结果VS1053模块还是可以正常工作的？ 那如果我GBUF引脚什么都不接，直接让它悬空，那最后会有什么影响吗？ 文章浏览阅读3. Another way of stating my confusion is how in the world does an audio signal from the VS1053 get processed if GBUF cannot be connected to ground. Can I connect the SMD-Speakers (500-800mW) directely to LEFT and RIGHT, or do I have to implement an amplifier like this one: MAX98306? VS1053的引脚AGND和DGND可以直接连接吗？不是说会有干扰的吗，而要用电阻或磁珠去间接连接？ 那对于DGND和AGND,PCB布线的时候又 View datasheets for VS1053 Tutorial by Adafruit Industries LLC and other related components here. when using the VS1053-v1 as MP3-player, i found out that there is much digital noise when used the line out configuration and amplified trough a TDA1113 amplifier. Sep 18, 2023 · Using an Uno and a SparkFun Musical Instrument Shield, this program rings a bell every two seconds: /* This code works with the VS1053 Breakout Board and controls the VS1053 in what is called Real Time MIDI mode. 5 KiB data RAM for user applications, serial control and input data interfaces, 4 general purpose I/O pins, an UART, as well as a high-quality variable-sample-rate mono ADC and Jan 3, 2024 · VS1053模块是一种音频解码芯片，可用于播放音频文件。它具有多种接口选项，包括I2S，SPI和UART。要连接喇叭到VS1053模块，你需要以下几个步骤。 第一步是选择合适的喇叭。喇叭有多种类型，包括动圈式喇叭、振动式喇叭和扬声器等。你需要根据你的需求和预算选择适合的喇叭。 接下来是连接喇叭到 GBUF must NOT be connected to ground under any circumstances. Feb 18, 2019 · VS1053B中文资料应用. … Jul 30, 2013 · This breakout board is the ultimate companion for the VLSI VS1053B DSP codec chip. The audio outputs push as much current as they can into the wrongly biased headphones; you will hear some distorted audio. The common buffer GBUF can be used for common voltage (1. Apr 21, 2013 · VS1053 - Trouble getting examples to work by brocktane » Tue Jun 18, 2013 7:27 pm 关于VS1053的GBUF引脚的作用-OpenEdv-开源电子网» 首页 › 单片机/嵌入式 › STM32-F0/F1/F2专区 › 关于VS1053的GBUF引脚的作用 返回列表 查看:3906|回复:4 Dec 22, 2013 · Re: VS1053 Volume at power up by MikeIsotech » Tue 2015-09-08 18:13 Help! Anyone? Does the VS1053 allow the output level to be set before playing a sound file? Getting Audio Out The VS1053 packs a lot of features into a tiny chip. However, because the SparkFun MP3 Player Shield finds it's way into applications beyond portable devices, the outputs need to be more flexible. 7k次，点赞13次，收藏63次。VS1053是一个高性能的音频解码器芯片，它是干什么的？ 他有两个功能：（）用来解码音频文件播放音乐的。（2）将麦克风听到的声音编码成音频文件数据，配合单片机可以保存到SD卡。单片机加上一个VS1053就可以轻松做一个`音乐播放器`、一个`录音机` 等 Jan 11, 2016 · Hi, I'm using a class D amp (PAM8403) connected to the VS1053 L and R outputs using the 'signal reconstruction circuit' suggested (470 ohm in series with a 4n7 cap). . And spi2_receive function reads data from register. important: the wireing diagram at the and of the article. 25V. t. 5A) dc wall outlet adapter? What else do I need in terms of resistors and/or capacitors between the vs1053 and the amp? Thanks! DAC tested with 1307. pdf- 采用国际 A 级 PCB 料，沉金工艺加工，稳定可靠； 采用全新元器件加工，纯铜镀金排针，坚固耐用； 人性化设计，各个接口都有丝印标注，使用起来一目了然；接口位置设计安排合理， 方 便顺手。 PCB 尺寸为 34mm*52. You can do all sorts of stuff with the audio as well such as 这样一个简单的播放过程就讲完了, 多说一句后面做的音乐频谱、播放时间的更新等等、 都是在丢VS1053 32 个字节后, 在等DREQ 为高时更新的。这样做好了就不会影响到音乐的正常播放, 还可以加很多效果! Jul 30, 2013 · This breakout board is the ultimate companion for the VLSI VS1053B DSP codec chip. It can also be used to record audio in both PCM (WAV) and compressed Ogg Vorbis. Description VS1003 is a single-chip MP3/WMA/MIDI au-dio decoder and ADPCM encoder. GBUF. If GBUF is not used, LEFT an RIGHT must be provided with coupling capacitors. pdf,VS1053b VLSI中国区域代理 深圳市源合汇通科技有限公司 联系方式:张先生 15361638451 WWW. r. trkg yybi ymmcjj fkxx sqka voihhy pvep tvma jrribp fgrq pbgum nggutkh zuzqz edmgys zvfyvwd