3.2

March 26, 2021

ES9016K2M Datasheet

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

8800 • www.esstech.com

14

Register #6: Soft Volume Control 3 and De-emphasis

8 bit, Read-Write Register, Default = 0x4A

Bits

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

Mnemonic

spdif_auto_deemph

deemph_bypass

deemph_sel

reserved *

vol_rate

Default

0

1

0

0

1

0

1

0

Bit

Mnemonic

Description

[7]

spdif_auto_deemph

1'b0 disables automatic de-emphasis select in SPDIF mode (default)

1'b1 enables automatic de-emphasis select in SPDIF mode

[6]

deemph_bypass

1'b0 enables de-emphasis filters

1'b1 disabled de-emphasis filters (default)

[5:4]

deemph_sel

2’b00 = 32kHz (default)

2’b01 = 44.1kHz

2’b10 = 48kHz

2’b11 = RESERVED

[3]

reserved *

Must be left as 1'b1 for normal operation

[2:0]

vol_rate

3'd2 by default

Sets the volume ramp rate to 0.0078125 x fs / 2(vol_rate-5) dB/s

* All Reserved Bits in Register #6 must be set to the indicated logic level to ensure correct device operation.

Register #7: General Settings

8 bit, Read-Write Register, Default = 0x80

Bits

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

Mnemonic

reserved

filter_shape

reserved *

iir_bw

mute

Default

1

0

0

0

0

0

0

0

Bit

Mnemonic

Description

[7]

reserved *

[6:5]

filter_shape

2'd0 = fast rolloff (default)

2'd1 = slow rolloff

2'd2 = minimum phase

2'd3 = reserved

[4]

reserved

[3:2]

iir_bw

2'd0 = 1.0757 x fs or 47.44kHz (fs = 44.1kHz) - Normal mode (default)

2'd1 = 1.1338 x fs or 50kHz (fs = 44.1kHz)

2'd2 = 1.3605 x fs or 60kHz (fs = 44.1kHz)

2'd3 = 1.5873 x fs or 70kHz (fs = 44.1kHz)

[1:0]

mute

This is a soft mute, which uses the ramping volume control.

mute[0]

•

1’b0: Channel 1 (default of left channel) unmuted (default)

•

1’b1: Channel 1 (default of left channel) muted

mute[1]

•

1’b0: Channel 2 (default of right channel) unmuted (default)

•

1’b1: Channel 2 (default of right channel) muted

* All Reserved Bits in Register #7 must be set to the indicated logic level to ensure correct device operation.