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ES9822PRO 数据表(PDF) 93 Page - ESS Technology,Inc |
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ES9822PRO 数据表(HTML) 93 Page - ESS Technology,Inc |
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93 / 126 page  0.3 ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM 93 ES9822 PRO Product Datasheet Register 113: ADC CH1 PROG FILTER AND IIR BANDWIDTH Bits [7:5] [4:2] [1] [0] Default 3'd4 3'd0 1'b0 1'b0 Bits Mnemonic Description [7:5] RESERVED NA [4:2] ADC1_FILTER_SHAPE Selects the 8x decimation FIR filter shape. • 3'd0: Minimum phase (default) • 3'd1: Linear phase apodizing • 3'd2: Linear phase fast roll-off • 3'd3: Linear phase fast roll-off low ripple • 3'd4: Linear phase slow roll-off • 3'd5: Minimum phase fast roll-off • 3'd6: Minimum phase slow roll-off • 3'd7: Minimum phase slow roll-off low dispersion [1] ADC1_PROG_COEFF_WRITE_EN Enables writing to the programmable coefficient RAM. • 1'b0: Disables write signal to the coefficient RAM (default) • 1'b1: Enables write signal to the coefficient RAM. [0] ADC1_PROG_COEFF_EN Enables the custom decimation filter coefficients. • 1'b0: Uses a built-in filter selected by FILTER_SHAPE (default) • 1'b1: Uses the coefficients programmed via PROG_COEFF_IN Register 114: ADC CH1 PROG FILTER COEFF ADDR Bits [7] [6:0] Default 1'b0 7'd0 Bits Mnemonic Description [7] ADC1_PROG_COEFF_STAGE Selects which stage of the filter to write. • 1'b0: Selects stage 1 of the decimation filter DFir_4x (default) • 1'b1: Selects stage 2 of the decimation filter DFir_2x [6:0] ADC1_PROG_COEFF_ADDR Selects the coefficient address when writing custom coefficients for the decimation filter. |
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