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LMX9820ASM bảng dữ liệu(PDF) 16 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LMX9820ASM
Giải thích chi tiết về linh kiện  Bluetooth Serial Port Module
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nhà sản xuất  NSC [National Semiconductor (TI)]
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LMX9820ASM bảng dữ liệu(HTML) 16 Page - National Semiconductor (TI)

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Revision 1.0
7.0 Functional Description (Continued)
7.5 AUDIO PORT
Advanced Audio Interface
The Advanced Audio Interface (AAI) is an advanced ver-
sion of the Synchronous Serial Interface (SSI) that pro-
vides a full-duplex communications port to a variety of
industry-standard 13/14/15/16-bit linear or 8-bit log PCM
codecs, DSPs, and other serial audio devices.
The LMX9820A allows the support for one codec. The
firmware selects the desired audio path and interface con-
figuration by a parameter stored in NVS. The audio path
options include the Motorola MC145483 codec, the OKI
MSM7717 codec through the AAI, or no audio.
Table 20 summarizes the audio path selection and the con-
figuration of the audio interface at the specific mode.
Table 20. Audio Path Configuration
Audio Path
Format
AAI Bit Clock
AAI Frame Clock
AAI Frame Sync
Pulse Length
Motorola MC1454831
13-bit linear
480 kHz
8 kHz
13 bits
OKI MSM7717
8-bit log PCM
(A-law only)
120 kHz
8 kHz
14 bits
1.
Due to internal clock divider limitations, the optimum of 512 kHz, 8 kHz cannot be reached. The values are set to the
best possible values. The clock mismatch does not result in any discernible loss in audio quality.



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