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LM4930ITL Scheda tecnica(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte LM4930ITL
Spiegazioni elettronici  Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4930ITL Scheda tecnica(HTML) 4 Page - National Semiconductor (TI)

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Pin Descriptions (Continued)
F2
LS+
Loudspeaker amplifier BTL positive out (+)
F3
AVDD_LS
Analog V
DD for loudspeaker amplifier
F4
DGND_X
Digital ground
F5
DVDD_X
Digital V
DD
F6
MCLK/XTAL_IN
12.288MHz or 24.576MHz Master Clock from crystal (via XTAL OUT) or external source
SYSTEM CONTROL REGISTERS
The LM4930 is controlled with a two-wire serial interface. This interface is used to configure the operating mode, digital interfaces,
and delta-sigma modulators. The LM4930 is controlled by writing information into a series of write-only registers, each with its own
unique 7 bit address. The following registers are programmable:
Basic Config Register
This register is used to configure the I
2S and PCM interfaces as well as the 48kHz DAC module. The 7 bit address for the
BASICCONFIG register is XX10000.
(X=0if ADDR is set to logic 0)
(X=1if ADDR is set to logic 1)
BASIC CONFIGURATION (XX1000).
(Set = logic 1, Clear = logic 0)
BIT
15
14
13
12
11
10
987654321
0
RESET
0
0
0000000000000
0
Address
Register
Description
3:0
MODE
The LM4930 can be placed in one of several modes that dictate the basic operation. When a
new mode is selected the LM4930 will change operation silently and will reconfigure the
power management profile automatically. The modes are described as follows: (Note 14)
Mode
Mono Speaker
Amplifier Source
Headphone Left
Source
Headphone Right
Source
Comment
0000
None
None
None
Powerdown mode
0001
None
None
None
Standby Mode
0010
Voice
None
None
Mono speaker
mode
0011
None
Voice
Voice
Headphone call
mode
0100
Voice
Voice
Voice
Conference call
mode
0101
Audio (L+R)
None
None
L+R mixed to
mono speaker
0110
None
Audio (Left)
Audio (Right)
Headphone
stereo audio
0111
Audio (L+R)
Audio (Left)
Audio (Right)
L+R mixed to
mono speaker +
stereo headphone
audio
1000
Audio (Left)
Voice
Voice
Mixed Mode
1001
Voice + Audio
(Left)
Voice
Voice
Mixed mode
1010
Voice
Audio (Left)
Audio (Left)
Mixed Mode
4
SOFT_RESET
Resets the LM4930, excluding the control registers
5
PCM_LONG
If set the PCM interface uses a long frame sync. (Note 12)
6
PCM_COMPANDED
If set the 8 MSBs are presumed to be companded data and the 8 LSBs are ignored. (Note
12)
7
PCM_LAW
If set, the companded G711 data is set to be A-law, else m-law is assumed (Note 12)
8:9
PCM_SYNC_MODE
Sets 1 (00h), 2 (01h) or 4(10h) 16 bit frames per sync. The PCM_SDO pin is tri-stated during
the latter frames. (Note 12)
www.national.com
4


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