LM4935RLEVAL datasheet(35/91 Pages) TI1

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LM4935, LM4935RLEVAL

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SNAS296D – OCTOBER 2005 – REVISED MARCH 2006

4.2.25 LS_OUTPUT CONFIGURATION REGISTER

This register is used to control the loudspeaker output. (Note 26)

Table 4-26. LS_OUTPUT (0x14h)

Bits

Field

Description

CPI_SELECT

If set the cell phone input channel of the mixer is added to the loudspeaker output signal.

RIGHT_SELECT

If set the right channel of the mixer is added to the loudspeaker output signal.

LEFT_SELECT

If set the left channel of the mixer is added to the loudspeaker output signal.

LS_MUTE

If set the loudspeaker output is muted.

4.2.26 HP_OUTPUT CONFIGURATION REGISTER

This register is used to control the stereo headphone output. (Note 27)

Table 4-27. HP_OUTPUT (0x15h)

Bits

Field

Description

SIDETONE_SELECT

If set the sidetone channel of the mixer is added to both of the headphone output signals.

CPI_SELECT

If set the cell phone input channel of the mixer is added to both of the headphone output signals.

RIGHT_SELECT

If set the right channel of the mixer is added to the headphone output. If the STEREO bit (0x00h) is set,

the right channel is added to the right headphone output signal only. If the STEREO bit (0x00h) is

cleared, it is added to both the right and left headphone output signals.

LEFT_SELECT

If set the left channel of the mixer is added to the headphone output. If the STEREO bit (0x00h) is set, the

left channel is added to the left headphone output signal only. If the STEREO bit (0x00h) is cleared, it is

added to both the right and left headphone output signals.

HP_MUTE

If set the headphone output is muted.

4.2.27 EP_OUTPUT CONFIGURATION REGISTER

This register is used to control the mono earpiece output. (Note 28)

Table 4-28. EP_OUTPUT (0x16h)

Bits

Field

Description

SIDETONE_SELECT

If set the sidetone channel of the mixer is added to the earpiece output signal.

CPI_SELECT

If set the cell phone input channel of the mixer is added to the earpiece output signal.

RIGHT_SELECT

If set the right channel of the mixer is added to the earpiece output signal.

LEFT_SELECT

If set the left channel of the mixer is added to the earpiece output signal.

EP_MUTE

If set the earpiece output is muted.

4.2.28 DETECT CONFIGURATION REGISTER

This register is used to control the headset detection system.

Table 4-29. DETECT (0x17h)

Bits

Field

Description

DET_INT

If set an IRQ is raised when a change is detected in the headset status. Clearing this bit will clear an IRQ that

has been triggered by the headset detect.

BTN_INT

If set an IRQ is raised when the headset button is pressed. Clearing this bit will clear an IRQ that has been

triggered by a button event.

TEMP_INT

If set an IRQ is raised during a temperature event. If cleared, the LM4935 will still automatically cycle the

power amplifiers off if the internal temperature is too high. This bit should not be set whenever the

loudspeaker amplifier is turned on. Clearing this bit will clear an IRQ that has been triggered by a temperature

event.

Application Information

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