ml7074-003 Oki Semiconductor, ml7074-003 Datasheet - Page 39

• Manufacturer Part Number: ml7074-003
• Description: Dual Echo Canceler & Noise Canceler With Dual Codec For Hands-free Msm7731-02dual Echo Canceler & Noise Canceler With Dual Codec For Hands-free
• Manufacturer: Oki Semiconductor

B7 to B3 Reserved bits.
B2
B1, B0
OKI Semiconductor
Initial Value
(13) CR12 (Reserved register)
CR12
NCSEL2
Noise attenuation selection control
Reserved bits.
This bit selects the noise attenuation of the noise canceler. In the “through mode”, the noise canceler is
halted and data is output directly. In the “normal mode” the noise canceler operates normally. Since the
noise attenuation in the normal mode is selected after the initial mode has been released, the change of
the noise attenuation during normal operation is invalid. If the
reset must be activated by the RDN/RST pin or the PDN/RST bit (CR0-B7). Changing to the through
mode during normal operation and returning to the normal mode are possible. This bit is internally
ORed with the NCSEL2. (Refer to the NCSEL1 pin of CR1-B0.)
Note:
noise, select the noise attenuation appropriate to the sound quality.
0
1
1
0
B7
—
0
Since there is a trade-off between noise attenuation and sound quality after canceling
NCSEL1
B6
—
0
0
1
0
1
Modification of initial values is inhibited.
Modification of initial value is inhibited.
B5
—
0
Through Mode
Normal Mode
Normal Mode
Normal Mode
NC Mode
B4
—
0
B3
—
0
Attenuation (dB)
13.5
NCSEL2
17
—
8
noise attenuation is changed,
B2
0
B1
—
0
FEDL7731-02-11
Quality
MSM7731-02
Better
Best
—
B0
—
0
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the