ES9028PRO datasheet(28/57 Pages) ESS

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CONFIDENTIAL INFORMATION v3.6

July 6, 2020

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

gpio_sel2

gpio_sel1

reserved

stereo_mode

ch1_vol

latch_vol

Default

2’b00

1’b1

1’b0

1’b1

Bit

Mnemonic

Description

[7:6]

gpio_sel2

Selects which input type will be

selected when GPIOX = 1’b1

•

2’d0: serial data (I2S/LJ/RJ) (default)

•

2’d1: SPDIF data

•

2’d2: reserved

•

2’d3: DSD data

[5:4]

gpio_sel1

Selects which input type will be selected when GPIOX = 1’b0

•

2’d0: serial data (I2S/LJ/RJ) (default)

•

2’d1: SPDIF data

•

2’d2: reserved

•

2’d3: DSD data

[3]

reserved

[2]

stereo_mode

Maps channel 1 and channel 2 data across all 8 channels of the DAC.

•

1’b0: normal 8 channel operation (default)

•

1’b1: stereo mode operation where channel 1 is mapped to

DACs 1, 3, 5 & 7, and channel 2 is mapped to DACs 2, 4, 6 & 8

[1]

ch1_vol

Force all eight channels to use the volume coefficients from channel 1.

•

1’b0: each channel has independent volume control (default)

•

1’b1: all eight DAC channels use the channel 1 volume

coefficient

[0]

latch_vol

Latches the data stores in registers 16-23 for use in calculating a new

volume coefficient. Setting this bit to 0 will allows a customer to

program all 8 channels individually and then update them all at once by

setting this bit back to 1.

•

1’b0: disables latching of the volume control registers

•

1’b1: enables the volume control registers (default)

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