ES9038Q2M datasheet(20/65 Pages) ESS

20 / 65 page

CONFIDENTIAL Rev. 1.3

July 17, 2019

ES9038Q2M Datasheet

ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-

8800 • Fax (408) 643-8801

Bits

[7]

[6]

[5:4]

[3]

[2:0]

Mnemonic

auto_deemph

deemph_bypass

deemph_sel

dop_enable

volume_rate

Default

1’b0

1’b1

2’b00

1’b0

2’b010

Bit

Mnemonic

Description

[7]

auto_deemph

Automatically engages the de-emphasis filters when SPDIF data is

provides and the SPDIF channel status bits contains valid de -emphasis

settings.

•

1’b1: enables automatic de-emphasis

•

1’b0: disables automatic de-emphasis (default)

[6]

deemph_bypass

Enables or disables the built-in de-emphasis filters.

• 1'b1 disabled de-emphasis filters (default)

• 1'b0 enables de-emphasis filters

[5:4]

deemph_sel

Selects which de-emphasis filter is used.

•

2’b11: reserved

•

2’b10: 48kHz

•

2’b01: 44.1kHz

•

2’b00: 32kHz (default)

[3]

dop_enable

Selects whether the DSD over PCM (DoP) logic is enabled.

•

1’b0: disables the DoP logic

•

1’b1: enables the DoP logic

[2:0]

volume_rate

Selects a volume ramp rate to use when transitioning between different

volume levels. The volume ramp rate is measured in decibels per

second (dB/s).

rate =

2vol_rate ∗ FSR

512

dB/s

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