ES9218PC datasheet(48/101 Pages) ESS

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ES9218P Datasheet

December 6, 2018

CONFIDENTIAL ADVANCE INFORMATION 1.8

ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 • Fax (408) 643-8801

GPIO Modes

The following table describes the supported values for gpio1_cfg or gpio2_cfg and their function.

gpioX_cfg

Name

I/O

Direction

Details

4’d0

Automute Status

Output

Output is high when an automute has been triggered. This signal is

analogous to Register 64 (Read-Only): Chip Status (0x40) automute_status.

4’d1

Lock Status

Output

Output is high when lock is triggered. This signal is analogous to Register

64 (Read-Only): Chip Status (0x40) lock_status.

4’d2

Volume Min

Output

Output is high when all digital volume controls have been ramped to

minus full scale. This can occur, for example, if automute is enabled and

set to mute the volume.

4’d3

CLK

Output

Output is a buffered CLK signal which can be used to synchronize other

devices.

4’d4

Interrupt

Output

Output is high for a variety of interrupts:

•

automute_status have changed. Clear by reading register 64.

•

Any bit in Register 65 (Read-Only): GPIO Readback (0x41) ocbr or

ocbl has gone high. Clear by reading register 65.

•

Any bit in Register 72 (Read-Only): Input Selection and Automute

Status (0x48) oc_sd_mute has gone high. Clear by disabling

overcurrent protection with Register 11: Overcurrent Protection

(0x0B) oc_sd_en.

See Register 33: Interrupt Mask (0x21) for details on masking these

interrupts.

4’d5

Reserved

4’d6

Reserved

4’d7

Output 1’b0

Output

Output is forced low.

4’d8

Standard Input

Input

Places the GPIO into a high impedance state, allowing the customer to

provide a digital signal and then read that signal back via the I2C from

4’d9

Input Select

Input

Places the GPIO into a high impedance state and allows the customer to

toggle the input selection between two modes using either GPIO pin. See

4’d10

Mute All

Input

Places the GPIO into a high impedance state. A mute condition can be

forced by applying a logic high signal to the GPIO. The mute condition

can be reset but applying a logic low signal to the GPIO.

This will not reset mute conditions caused by an automute.

4’d11

Amp Mode Select

Input

Activates the amplifier mode set in Register 32: Amplifier Configuration (0x20)

when the GPIO is pulled up. This option is only available for GPIO1.

4’d12

Reserved

4’d13

Shut Down

Input

Shutdown GPIO.

4’d14

Soft Start

Complete

Output

Output is high when the DAC output is ramped to ground. The DAC can

be ramped to ground via an automute condition when appropriately

programmed (see Automute), or via Register 14: Soft Start Configuration

(0x0E).

4’d15

Output 1’b1

Output

Output is forced high.

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