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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RM0319 датащи(PDF) 291 Page - STMicroelectronics |
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RM0319 датащи(HTML) 291 Page - STMicroelectronics |
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291 / 368 page  RM0319 Digital audio port (I2S) Doc ID 022640 Rev 3 291/368 27 Digital audio port (I2S) This chapter focuses on I2S functionality and operation. For technical details about the programmable registers related to the I2S, refer to the I2S registers in the following companion document: ● RM0321: SPEAr320S address map and registers 27.1 Overview Highly configurable, the I2S controller is for use in audio applications, providing a simple interface to standard audio components. 27.2 Main features ● Compliant to Philips I2S serial bus specifications ● I2S Master for input/output operations ● Supports 2.0 (Stereo) Audio Tx/Rx ● Supports 12/16/20/24/32 bit audio data interface ● Supports standard sampling rates (8, 16, 32, 44.1, 48, 96, 192 kHz). The input clock to the PLL is 24 MHz, so the rate precision depends on the chosen rate and divider. ● Programmable FIFO thresholds ● Supports data exchange to the system memory through DMA interface 27.3 External pins Table 87. I2S signals Signal name Description I/O audio_over_samp_clk Reference clock (Tx) O I2S_CLK Serial interface clock (Tx) O I2S_LR Word select line (Tx; active high) O I2S_RX Serial data input for receive channel I I2S_TX Serial data output for transmit channel O |
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