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WM8595 датащи(PDF) 20 Page - Wolfson Microelectronics plc |
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WM8595 датащи(HTML) 20 Page - Wolfson Microelectronics plc |
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20 / 82 page ![]() WM8595 Production Data w PD, Rev 4.2, January 2011 20 3-WIRE (SPI COMPATIBLE) SERIAL CONTROL INTERFACE MODE REGISTER WRITE SDA is used for the program data, SCLK is used to clock in the program data and CS ¯ ¯ is use to latch in the program data. SDA is sampled on the rising edge of SCLK. The 3-wire interface write protocol is shown in Figure 11. Figure 11 3-Wire Serial Interface Write Protocol • W indicates write operation. • A[6:0] is the register index. • B[15:0] is the data to be written to the register indexed. • CS ¯ ¯ is edge sensitive – the data is latched on the rising edge of /CS. REGISTER READ-BACK The read-only status registers can be read back via the SDOUT pin. Read Back is enabled when the R/W bit is high. The data can then be read by writing to the appropriate register address, to which the device will respond with data. Figure 12 3-Wire Serial Interface Readback Protocol REGISTER RESET Any write to register R0 (00h) will reset the WM8595. All register bits are reset to their default values. |
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