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LM49370RLX-NOPB Datasheet(HTML) 33 Page - Texas Instruments

Part No. LM49370RLX-NOPB
Description  Boomer® Audio Power Amplifier Series Audio Sub-System with an Ultra Low EMI, Spread Spectrum, Class D Loudspeaker Amplifier, a Dual-Mode Stereo Headphone Amplifier, and a Dedicated PCM Interface for Bluetooth Transceivers
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LM49370RLX-NOPB Datasheet(HTML) 33 Page - Texas Instruments

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LM49370
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SNAS356D – FEBRUARY 2007 – REVISED MARCH 2012
LS_OUTPUT CONFIGURATION REGISTER
This register is used to control the loudspeaker output.(1)
Table 27. LS_OUTPUT (0x14h)
Bits
Field
Description
0
CPI_SELECT
If set, the cell phone input channel of the mixer is added to the loudspeaker output signal.
1
RIGHT_SELECT
If set, the right channel of the mixer is added to the loudspeaker output signal.
2
LEFT_SELECT
If set, the left channel of the mixer is added to the loudspeaker output signal.
3
LS_MUTE
If set, the loudspeaker output is muted.
4
RSVD
Reserved.
(1)
The gain of the loudspeaker output amplifier is 12 dB.
HP_OUTPUT CONFIGURATION REGISTER
This register is used to control the stereo headphone output.(1)
Table 28. HP_OUTPUT (0x15h)
Bits
Field
Description
0
SIDETONE_SELECT
If set, the sidetone channel of the mixer is added to both of the headphone output signals.
1
CPI_SELECT
If set, the cell phone input channel of the mixer is added to both of the headphone output signals.
2
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.
3
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.
4
HP_MUTE
If set, the headphone output is muted.
5
STEREO
If set, the mixers assume that the signals on the left and right internal busses are highly correlated and
when these signals are combined their levels are reduced by 6dB to allow enough headroom for them to
be summed.
6
OCL
If set, the part is placed in OCL (Output Capacitor Less) mode.
(1)
The gain of the headphone output amplifier is –6 dB for the cell phone input channel and sidetone channel of the mixer. When the
STEREO bit (0x00h) is set, headphone output amplifier gain is –6 dB for the left and right channel. When the STEREO bit (0x00h) is
cleared, the headphone output amplifier gain is –12 dB for the left and right channel (to allow enough headroom for adding them and
routing them to both headphone amplifiers).
EP_OUTPUT CONFIGURATION REGISTER
This register is used to control the mono earpiece output.(1)
Table 29. EP_OUTPUT (0x16h)
Bits
Field
Description
0
SIDETONE_SELECT
If set, the sidetone channel of the mixer is added to the earpiece output signal.
1
CPI_SELECT
If set, the cell phone input channel of the mixer is added to the earpiece output signal.
2
RIGHT_SELECT
If set, the right channel of the mixer is added to the earpiece output signal.
3
LEFT_SELECT
If set, the left channel of the mixer is added to the earpiece output signal.
4
EP_MUTE
If set, the earpiece output is muted.
(1)
The gain of the earpiece output amplifier is 6 dB.
Copyright © 2007–2012, Texas Instruments Incorporated
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