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| 型号： | WLA49VVA |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | ADC |
| 英文描述： | Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC |
| 中文描述： | 音频子系统的双模单声道立体声耳机和扬声器放大器的高效率和多功能模数转换器 |
| 文件页数： | 55/112页 |
| 文件大小： | 5017K |
| 代理商： | WLA49VVA |
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12.0 Status & Control Registers (Continued)
12.26 HP_OUTPUT CONFIGURATION REGISTER
This register is used to control the stereo headphone output. (Note 27)
TABLE 27. 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.
Note 27: 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).
LM4935
www.national.com
47
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