ES9018 datasheet(33/54 Pages) ESS

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2.3

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

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ES9018S Product Datasheet

Read Write Registers

Bits

[7:6]

[5]

[4]

[3:2]

[1]

[0]

Default

2'b00

1'b0

Bits

Mnemonic

Description

[7:6]

RESERVED

[5]

STAGE1_PROG_COEFF_ENABLED

Stage 1 FIR filter custom coefficient control.

•

1'b1: The stage 1 interpolating FIR filter will use the

downloaded (custom) coefficients.

•

1'b0: The stage 1 interpolating FIR filter will use the

built-in coefficients

[4]

STAGE1_PROGRAMMING_ENABLED

Stage 1 coefficients write enable.

•

1'b1: The stage 1 coefficients are set for writing. This

bit must be enabled prior to programming the stage 1

FIR coefficients.

•

1'b0: The stage 1 coefficients are not set for writing

[3:2]

RESERVED

[1]

STAGE2_PROG_COEFF_ENABLED

Stage 2 FIR filter custom coefficient control.

•

1'b1: The stage 2 FIR filter will use the downloaded

(custom) coefficients.

•

1'b0: The stage 2 FIR filter will use the built-in

coefficients.

[0]

STAGE2_PROGRAMMING_ENABLED

Stage 2 coefficients write enable.

•

1'b1: The stage 2 coefficients are set for writing. This

bit must be enabled prior to programming the

RESERVED.

•

1'b0: The stage 2 coefficients are not set for writing.

Bits

[31:0]

Default

Bits

Mnemonic

Description

[31:0]

STAGE1_FIR_COEFFICIENTS

These 32 bits are used for writing the stage 1 FIR coefficients.

See the programming section for more information.

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