ES9028PRO datasheet(38/57 Pages) ESS

38 / 57 page

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

[7:2]

[1]

[0]

Mnemonic

chip_id

automute_status

lock_status

Default

6’b101000

1’b0

Bit

Mnemonic

Description

[7:2]

chip_id

Determines the chip identification

•

6'b101000: ES9028PRO

[1]

automute_status

Indicator for when automute has become active.

•

1’b0: Automute condition is inactive

•

1’b1: Automute condition has been flagged and is active

[0]

lock_status

Indicator for when the DPLL is

locked (when in slave mode) or 1’b1 when the

Sabre is the master

•

1’b0: DPLL is not locked to the incoming audio sample rate (which

could mean that no audio input is present, the lock has not

completed, or the Sabre is unable to lock due to clock jitter or drift)

•

1’b1: DPLL is locked to the incoming audio sample rate, or the Sabre

is in master mode, 128fs_mode or NCO mode mode

Bits

[7:4]

[3]

[2]

[1]

[0]

Mnemonic

reserved

gpio4

gpio3

gpio2

gpio1

Default

4’b0000

1’b0

Bit

Mnemonic

Description

[7:4]

reserved

[3]

gpio4

Contains the state of the GPIO4 pin.

[2]

gpio3

Contains the state of the GPIO3 pin.

[1]

gpio2

Contains the state of the GPIO2 pin.

[0]

gpio1

Contains the state of the GPIO1 pin.

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