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CS5376A датащи(PDF) 63 Page - Cirrus Logic |
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CS5376A датащи(HTML) 63 Page - Cirrus Logic |
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63 / 107 page ![]() CS5376A 63 data is read from the SD port data FIFO, SDRDY is released and SDTKO is pulsed high for 100 nS. 16.3.2 Continuous Mode To have the CS5376A automatically initiate SD port transactions whenever data becomes available, connect SDTKI to a 4 MHz or slower clock source such as MCLK/2. The first rising edge into SDTKI after data becomes available in the SD port FIFO causes the CS5376A to initiate an SD port transac- tion by driving SDRDY low. If data is not available in the SD port FIFO, the SDTKI signal is passed through to the SDTKO output. Once an SD port transaction is initiated, serial clocks into SDCLK cause data to be output to SDDAT, as shown in Figure 35. When all available data is read from the SD port data FIFO, SDRDY is released and SDTKO is pulsed high for 100 nS. SDRDY SDCLK SDDAT Figure 35. SD Port Transaction MSB LSB SDTKI SDTKO |
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