ES9038Q2M datasheet(32/65 Pages) ESS

32 / 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]

[1:0]

Mnemonic

asrc_en

reserved

ch1_volume

latch_vol

18db_gain

Default

1’b1

2’b10

1’b1

1’b0

1’b1

2’b00

Bit

Mnemonic

Description

[7]

asrc_en

Selects whether the ASRC is enabled.

•

1’b0: ASRC is disabled and the output from the THD

compensation block is piped directly into the modulators.

•

1’b1: The ASRC is used as normal, providing a first order

correction on the sample rate converted data.

[6:5]

reserved

[4]

reserved

[3]

ch1_volume

Allows channel 2 to share the channel 1 volume control. This allows for

perfectly syncing up the two channel gains.

•

1’b0: Allow independent control of both channel 1 and channel

volume controls (default)

•

1’b1: Use the channel 1 volume control for both channel 1 and

channel 2

This bit can only be used for PCM audio data

[2]

latch_volume

Keeps the volume coefficients in synchronization with the programmed

volume register.

•

1’b0: Disables updates of the internal volume coefficients (useful

for updating each channel volume independently and then

moving the volume coefficients in tandem)

•

1’b1: The internal volume coefficient is kept in synchronization

with the volume registers

[1:0]

18db_gain

Applies +18dB gain to the DAC datapath.

•

2’b00: No gain on either channels

•

2’b01: Normal gain on channel 2, +18dB gain on channel 1

•

2’b10: +18dB gain on channel 2, normal gain on channel 1

•

2’b11: +18dB gain on both channel 2 and channel 1

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