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CS5378 データシート(PDF) 33 Page - Cirrus Logic |
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CS5378 データシート(HTML) 33 Page - Cirrus Logic |
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33 / 86 page  CS5378 DS639F1 33 9.4 Microcontroller Configuration Commands A summary of available microcontroller configura- tion commands is listed in Table 9. Write DF Register - 0x01 This configuration command writes a specified digital filter register. Digital filter registers control hardware peripherals and filtering functions. See “Digital Filter Registers” on page 71 for the bit def- initions of the digital filter registers. Sample Command: Write digital filter register 0x00 with data value 0x060431. Then write 0x20 with data 0x000240. 02 03 00 00 01 00 00 00 06 04 31 Delay 1 ms or poll E2DREQ 02 03 00 00 01 00 00 20 00 02 40 Delay 1 ms or poll E2DREQ Read DF Register - 0x02 This command reads a specified digital filter regis- ter. The register value is requested in the first serial transaction, with the register value copied to SPIDAT1 and read in a subsequent serial transac- tion. Sample Command: Read digital filter registers 0x00 and 0x20. 02 03 00 00 02 00 00 00 Delay 1 ms or poll E2DREQ MOSI: 03 06 00 00 00 MISO: xx xx 06 04 31 02 03 00 00 02 00 00 20 Delay 1 ms or poll E2DREQ MOSI: 03 06 00 00 00 MISO: xx xx 00 02 40 [DATA] indicates data word returned from digital filter. (DATA) indicates multiple words of this type are to be written. Name CMD 24-bit DAT1 24-bit DAT2 24-bit Description NOP 000000 - - No Operation WRITE DF REGISTER 000001 REG DATA Write Digital Filter Register READ DF REGISTER 000002 REG [DATA] - - Read Digital Filter Register WRITE FIR COEFFICIENTS 000003 NUM FIR1 (FIR COEF) NUM FIR2 (FIR COEF) Write Custom FIR Coefficients WRITE IIR COEFFICIENTS 000004 a11 b11 a22 b21 b10 a21 b20 b22 Write Custom IIR Coefficients WRITE ROM COEFFICIENTS 000005 COEF SEL - Use On-Chip Coefficients NOP 000006 - - No Operation NOP 000007 - - No Operation FILTER START 000008 - - Start Digital Filter Operation FILTER STOP 000009 - - Stop Digital Filter Operation Table 9. Microcontroller Boot Configuration Commands |
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