January 16, 2020

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ES9028Q2M Datasheet

21

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

8800 • WWW.ESSTECH.COM

Register #15: Volume 1 (usually selected for the Left Channel, but can be reversed using Register #11)

8 bit, Read-Write Register, Default = 0x50

Bits

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

Mnemonic

volume1

Default

0

1

0

1

0

0

0

0

Bit

Mnemonic

Description

[7:0]

volume1

Default to 8

’d80 (–40dB)

0dB to

–127.5dB in 0.5dB steps

Register #16: Volume 2 (usually selected for the Right Channel, but can be reversed using Register #11)

8 bit, Read-Write Register, Default = 0x50

Bits

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

Mnemonic

volume2

Default

0

1

0

1

0

0

0

0

Bit

Mnemonic

Description

[7:0]

volume2

Default to 8

’d80 (–40dB)

0dB to

–127.5dB in 0.5dB steps

Register #20-17: Master Trim

32 bit, Read-Write Register, Default =

32’h7ffffff. Reg 20 are the MSB’s, Reg 17 are the LSBs.

Bits

[31:0]

Mnemonic

master_trim

Default

32

’h7fffffff

This is a 32 bit value that sets the 0dB level for all volume controls. This is a signed number, so it should never exceed

32

’h7fffffff (which is 231 – 1).