STM32 F3产品技术培训-15.I2S模块.pdfSTM32 F3产品技术培训-15.I2S模块

文件名称: STM32 F3产品技术培训-15.I2S模块.pdf

所属分类: 其它

开发工具:

文件大小: 498kb

下载次数: 0

上传时间: 2019-09-14

提供者: weixin_********

下载 (498kb)

不能下载？报告错误

详细说明：STM32 F3产品技术培训-15.I2S模块SPI/2S mode switch 3 The 12S protocol is used for audio data communication between a microcontroller/dSP and an audio codeC/dAc 12S interface is implemented as a mode in the sPI peripheral To switch from sPi to 2s mode Disable SPI peripheral (reset SPE bit in SPI CR1 register) Select 12S mode(set 12SMOD bit in SPI 12SCFGR register) life. augmented 12S Features(1/2) 4 TWo 12Ss: Available on SP12 and sPl3 peripherals TWo 12Ss extension added for Full-Duplex communication Simplex/or Full duplex communication(transmitter and receiver) 12S2 and 12S3 operate in master or slave configuration 8-bit programmable linear prescaler to support all standard audio sample frequencies from 8 kHz up to 192 kHz Audio-frequency precision same as high-density and XL-density devices Programmable data format (16-, 24-or 32-bit data formats) life. augmented 12S Features(1/2) Underrun flag in slave transmit mode, Overrun flag in receive mode and new de-synchronization flag in slave transmit/receive mode Support for dmA: new dma requests for 12S2 ext/12$3 ext allows full duplex transfers 12S protocols supported 12S Phillips standard MSB Justified standard (Left Justified) LSB Justified standard(Right Justified) PCM standard (with short and long frame synchronization on 16-bit channel frame or 16-bit data frame extended to 32-bit channel frame) Master clock may be output to drive an external audio component Ratio is fixed at 256xFs(where Fs is the audio sampling frequency a The choice of the standard strongly depends on the external device and the audio data to be transmitted life. augmented 12S full duplex block diagram(1/2)6 To support 12S full duplex mode, two extra 12S instances called extended 12Ss(2S2 ext, 12S3 ext) are available in addition to I2S2 and 2S3. The first 12S full duplex interface is consequently based on 12S2 and 2s2 ext, and the second one on 2S3 and 2S3 ext 2SX SCK 12S CKIN 2SXCLK SP/2SX □2sxsD(nou PLLCLK SYSCLK 2SX WS HSI HSE I2SSRC 12Sx ext 12Sx extsD(out/in) SW STM32F30XXX Where x can be 2 or 3 12Sx ext can be used only in full duplex mode(always in slave mode) Both 12Sx and 2Sx ext can be configured as transmitters or receivers life. augmented Half/Full-Duplex Communication 7 12S configured in Half/Full-Duplex communication mode 2C controls STM32F30XXX Audio codec 2Sx SCKI CK 2sxsD(nou)「 SD And 12Sx WS WS 12Sx_extSD(outlin)O SD 12SX MCLK MCLK The master and slave configuration is managed only by Half-Duplex synchronous audio transmission software The master device is the CK and Ws generator Depends on the Codec control method The master/slave modes and transmit/receive directions can be switched dynamically by life. augmented software 2 X Full-Duplex Communication 8 UART controls /2S out Bluetooth /2s in 12S out STM32F30XXX Audio codec /2S in 12C controls Battery Bluetooth headset Depends on the Codec control method Depends on the Bluetooth control method life. augmented STM32F37XXX VS STM32F30XXXg Features STM32F37XXX STM32F30XXX Instance 3(2S1,|2S2,|2S3) 2(|2S2,2S3) Communication mode Simplex Simplex/full-duplex External clock No es life. augmented Quiz 10 How many 2Ss are available in the stm32F30xXx and sTM32F37xXX microcontroller? How to use 12Ss available in the stM32F30xXX in Full duplex mode? What are the standard audio frequencies supported by 12Ss? What are the different 12S error flags? life. augmented

(系统自动生成,下载前可以参看下载内容)