ES9028PRO datasheet(17/57 Pages) ESS

17 / 57 page

July 6, 2020

CONFIDENTIAL INFORMATION v3.6

ES9028PRO 32-Bit HyperStream® II 8-Channel Audio DAC

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

automute_config

serial_bits

serial_length

serial_mode

Default

2’b00

2’b11

2’b00

Bit

Mnemonic

Description

[7:6]

automute

config

Configures the automute state machine, which allows the SABRE DAC to

perform different power saving and sound optimizations.

•

2’b11: perform a mute and then ramp all channels to ground when an

automute condition is asserted

•

2’b10: ramp all channels to ground when an automute condition is

asserted

•

2’b01: perform a mute when an automute condition is asserted

•

2’b00: normal operation (default)

Note: Ramping DAC outputs to ground can reduce the power consumption of

the SABRE DAC in some situations.

Note: This process can be sped up by using the automute_time, volume_rate

and soft_start_time registers.

[5:4]

serial_bits

Selects how many bits consist of a data word in the serial data stream.

•

2’b11: 32-bit data words (default)

•

2’b10: 32-bit data words

•

2’b01: 24-bit data words

•

2’b00: 16-bit data words

[3:2]

serial_length

Selects how many DATA_CLK pulses exist per data word.

•

2’b11: 32-bit data words (default)

•

2’b10: 32-bit data words

•

2’b01: 24-bit data words

•

2’b00: 16-bit data words

[1:0]

serial_mode

Configures the type of serial data.

•

2’b11 or 2’b10: right-justified mode

•

2’b01: left-justified mode

•

2’b00: I2S mode (default)

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