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STM32F217VG 数据表(PDF) 157 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 157 Page - STMicroelectronics |
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157 / 173 page  STM32F21xxx Application block diagrams Doc ID 17050 Rev 8 157/173 A.5 Complete audio player solutions Two solutions are offered, illustrated in Figure 87 and Figure 88. Figure 87 shows storage media to audio DAC/amplifier streaming using a software Codec. This solution implements an audio crystal to provide audio class I2S accuracy on the master clock (0.5% error maximum, see the Serial peripheral interface section in the reference manual for details). Figure 87. Complete audio player solution 1 Figure 88 shows storage media to audio Codec/amplifier streaming with SOF synchronization of input/output audio streaming using a hardware Codec. Figure 88. Complete audio player solution 2 1. SOF = start of frame. Cortex-M3 core up to 120 MHz OTG (host mode) + PHY SPI/ FSMC SPI GPIO I2S XTAL 25 MHz or 14.7456 MHz USB Mass-storage device MMC/ SDCard LCD touch screen Control buttons DAC + Audio ampli File System Program memory Audio CODEC User application ai16039c Cortex-M3 core up to 120 MHz OTG + PHY SPI/ FSMC SPI/ FSMC GPIO I2S USB Mass-storage device MMC/ SDCard LCD touch screen Control buttons Audio ampli File System Program memory Audio PLL +DAC User application ai16040c SOF SOF synchronization of input/output audio streaming XTAL 25 MHz or 14.7456 MHz |
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