AS3415 datasheet(79/102 Pages) AMSCO

79 / 102 page

ams Datasheet, Confidential: 2014-Jun-13 [v1-30]

AS3415/AS3435 – 79

Reg i st er Description

Figure 100:

MODE_2 Register Description

Name

Address

Default Value

MODE_2

0x35

0x00

This register controls miscellaneous settings of the AS3515/35.

Bit

Bit Name

Default

Access

Bit Description

TEST_BIT_7

R/W

Test register. Please do not write this register.

LINL_ON_DIFF

R/W

This bit enables the left line input filter OPAMP in

differential operation mode of the headphone

amplifier. The differential headphone mode is enabled

by setting bit HP_MODE in register 0x35. If HP_MODE

bit is not set LINL_ON_DIFF bit has no influence on the

operation mode of the left line input OPAMP.

0: Left line input OPAMP disabled

1: Left line input OPAMP enabled

MICS_DC_OFF

R/W

This bit disables the internal microphone supply

discharge function if the microphone supply is

switched off.

0: MICS discharge enabled

1: MICS discharge disabled

DELAY_HPH_MUX

R/W

With this bit it is possible to delay the HPH_MUX setting

during startup of the device to avoid unwanted pop

noise in case of long charging times of external

components.

0: HPH_MUX_OTP delay disabled

1: HPH_MUX_OTP delay enabled

HPH_MODE

R/W

This register controls the operating mode of the

headphone amplifier. The headphone amplifier

supports single ended mode and differential mode. In

differential output mode the right audio signal path is

the active input signal for the headphone amplifier.

0: Stereo single ended mode

1: Mono differential mode

I2C_MODE

R/W

This bit enables I²C power down of the AS3415/35.

0: I²C power down disabled

1: I²C power down enabled via PWR_HOLD bit.

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