Datasheet

LM49350, LM49350RLEVAL
SNAS359D –SEPTEMBER 2008–REVISED JUNE 2012 www.ti.com
GPIO Registers
Table 86. GPIO (0xE0h)
Bits Field Description
3:0 GPIO_MODE This sets the mode of the GPIO pin.
GPIO_MODE GPIO Function
0000 OFF (input disabled)
0001 GPIO_RX
0010 GPIO_TX
0011 HP_ENB (out)
0100 HP_ENB (out)
0101 LS_ENB (out)
0110 LS_ENB (out)
0111 SHORT_CCT or THERMAL (out)
1000 SHORT_CCT or THERMAL or CLIP (out)
1001 CLIP (out)
1010 ADC_NG_ACTIVE (out)
1011 ADC_NG_ACTIVE (out)
1100 MIC_MUTE (in)
1101 MIC_MUTE (in)
1110 CHIP_ENB (in)
1111 CHIP_ENB (in)
4 GPIO_TX If set, the GPIO pin will transmit a logic high whenever GPIO_MODE is set to '0010'.
5 GPIO_RX This bit reports what logic level is present on the GPIO pin.
6 SHORT_CCT If set, the GPIO records that a short circuit event has occurred on the class D outputs.
7 THERMAL_EVENT If set records that a temperature event has occurred on the die.
Clear on Write (1).
Table 87. DEBUG1 (0xF0h)
Bits Field Description
1:0 DAC_DITHER This sets the amount of DAC dither. Lower levels of the dither may improve the noise floor of
_LVL the DAC.
DAC_DITHER
Level
_LVL
00 Very Small
01 Small
10 Medium (Default)
11 Large
3:2 DAC_DITHER This sets the DAC dither mode.
_MODE
DAC_DITHER
Mode
_MODE
00 AUTOMATIC
01 ON
10 OFF
4 Not Used
5 SOFT_RESET If set, the LM49350 enters RESET mode. To bring the LM49350 back out of RESET mode,
then set this bit back to zero.
7:6 RSVD Reserved
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