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LM49352 Scheda tecnica(PDF) 95 Page - Texas Instruments

Il numero della parte LM49352
Spiegazioni elettronici  Boomer Mono Class D Audio Codec Subsystem with Ground Referenced Headphone Amplifiers, Earpiece Driver, and Audio DSP
PDF  106 Pages
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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LM49352 Scheda tecnica(HTML) 95 Page - Texas Instruments

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LM49352
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SNAS467E – MARCH 2009 – REVISED MARCH 2013
Table 82. GPIO1 (0xE0h) (continued)
Bits
Field
Description
7
GPIO_RX
This bit reports the logic level is present on the GPIO pin.
Table 83. GPIO2 (0xE1h)
Bits
Field
Description
0
SHORT
This bit will go high whenever a short circuit condition occurs on the Class D loudspeaker
amplifier outputs. Once triggered by a short circuit event, an I2C write of 1 to this bit clear this bit.
1
TEMP
This bit will go high whenever the temperature of the LM49352 reaches a critical temperature.
Once triggered by a thermal event, an I2C write of 1 to this bit clear this bit.
Table 84. RESET (0xF0h)
Bits
Field
Description
4:0
RSVD
Reserved.
5
SOFT_RESET
Setting this bit resets the digital core of LM49352. SOFT_RESET does not affect the current I2C
register settings.
Table 85. Spread Spectrum (0xF1h)
Bits
Field
Description
1:0
RSVD
Reserved
2
SS_DISABLE
If this bit is set, Spread Spectrum mode will be disabled from the Class D amplifier.
Table 86. FORCE (0xFE)
Bits
Field
Description
0
RSVD
Reserved
1
DACREF
This bit determines whether the DAC reference voltage is internally generated or externally
driven.
DACREF
STATUS
0
DACREF uses an internal bandgap reference.
1
DACREF is driven by an external voltage reference.
2
CP_FORCE
If set, a -LS_VDD rail will be generated on HP_VSS, even if the headphone output stage is not
required.
Copyright © 2009–2013, Texas Instruments Incorporated
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