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LM4931ITL/NOPB bảng dữ liệu(PDF) 21 Page - Texas Instruments

tên linh kiện LM4931ITL/NOPB
Giải thích chi tiết về linh kiện  LM4931 Boomer™ Audio Power Amplifier Series Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
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nhà sản xuất  TI2 [Texas Instruments]
Trang chủ  https://www.ti.com
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LM4931ITL/NOPB bảng dữ liệu(HTML) 21 Page - Texas Instruments

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PCM_CLK
PCM_SYNC
PCM_SDO/
PCM_SDI
Short frame sync mode (PCM_LONG = 0)
Long frame sync mode (PCM_LONG = 1)
LM4931
www.ti.com
SNAS251E – APRIL 2004 – REVISED MAY 2013
Table 24. PMC_CONFIG (0Ah) (SET = LOGIC 1, CLEAR = LOGIC 0) (continued)
Address
Register
Description
Set the GPIO port function(3):
5:3
GPIO
000
HP_CONNECTED
001
VC_CLOCK
010
GPIO_DATA
5:3
GPIO_SETUP
011
EXT_LS_ENABLE
100
VOICE_ADC_SD
101
VOICE_DAC_SD
110
DAC_LEFT_SD
111
DAC_RIGHT_SD
6
RSVD
RESERVED(4)
7
CLASS_D_DITHER
When set enables dither in the class D amplifier
(3)
VC_CLOCK is only supplied over the GPIO port if the voice codec is enabled.
(4)
Reserved bits should be set to zero when programming the associated register.
Audio Interfaces
I2S
The LM4931 supports both master and slave I2S transmission at either 16 or 32 bits per word at clock rates up
to 3.072MHz (48kHz stereo, 32bit). The basic format is shown below:
Figure 6.
PCM
The PCM interface is both master and slave and is compatible with Texas Instruments' AAI, Motorola’s SSI, and
Texas Instrument’s McBSP audio codec interfaces. The protocol is short frame sync MSB first 2’s complement
16 bit linear. The MSB always follows the sync pulse. In the case of companded data the first 8 bits are used and
the interface can be slowed to 8 clock cycles per sync. In PCM_LONG mode the PCM_SYNC signal is inverted
relative to that shown below.
Figure 7.
Copyright © 2004–2013, Texas Instruments Incorporated
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