ES9842PRO datasheet(129/167 Pages) ESS

129 / 167 page

VERSION 0.5

ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM

ES9842 PRO Product Datasheet

129

Bits

[7:2]

[1:0]

Default

6'd36

2'd0

Bits

Mnemonic

Description

[7:2]

RESERVED

[1:0]

ADC2_DATA_SCALE

ADC data scale.

• 2'd0: +0dB

• 2'd1: +6dB

• 2'd2: +12dB

• 2'd3: +18dB

Bits

[7:5]

[4:2]

[1]

[0]

Default

3'd4

3'd0

1'b0

Bits

Mnemonic

Description

[7:5]

RESERVED

[4:2]

ADC2_FILTER_SHAPE

Selects the 8x decimation FIR filter shape.

• 3'd0: Minimum phase (default)

• 3'd1: Linear phase apodizing fast roll-off

• 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]

ADC2_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]

ADC2_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

ADC2_PROG_COEFF_IN

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