AS3421 datasheet(28/61 Pages) AMSCO

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10 Register Description

Table 15. I2C Register Overview

Addr

Name

Audio Registers

00-07h

reserved

08h

MIC_L

MIC_MODE

0: StereoSingleEnd

1: MonoDiff

MICL_VOL<6:0>

Gain from MICL to QMICL or Mixer = MUTE, -11.25dB...+36dB; 127 steps of 0.375dB

09h

MIC_R

MIC_REG_ON

0: use reg 30h & 31h

1: use reg 08h & 09h

MICR_VOL<6:0>

Gain from MICR to QMICR or Mixer = MUTE, -11.25dB...+36dB; 127 steps of 0.375dB

0Ah

LINE_IN

LIN_REG_ON

0: use reg 33h and VOL pin

1: use reg 0Ah

LIN_GAIN_+3dB

0: 0dB max. Line Gain

1: +3dB max. Line Gain

LIN_VOL<5:0>

0: MUTE;

0x01..0x3F: Gain from LINR/L to QLINR/L or Mixer = -46.5dB...+0dB; 63 steps of 0.75dB with LIN_GAIN_+3dB bit set to ‘0’

0x01..0x3F: Gain from LINR/L to QLINR/L or Mixer = -43.5dB...+3dB; 63 steps of 0.75dB with LIN_GAIN_+3dB bit set to ‘1’

0Bh

GP_OP_L

HP_MUX<1:0>

0: MIC; 1: OP1;

2: OP2; 3: open

OP2L<3:0>

0: OP2L inverting mode;

0x1..0xF: OP2L non inverting mode gain = 0...10.5dB; 15 steps of 0.75dB

OP2L_ON

OP1L_ON

0Ch

GP_OP_R

OP_REG_ON

0: use reg 34h

1: use reg 0Bh & 0Ch

HP_MODE

0: StereoSingleEnd

1: MonoDiff

OP2R<3:0>

0: OP2R inverting mode;

0x1..0xF: OP2R non inverting mode gain = 0...10.5dB; 15 steps of 0.75dB

OP2R_ON

OP1R_ON

0Dh-0Fh

reserved

18h-1Fh

reserved

System Register

20h

SYSTEM

Design_Version<3:0> 1001

REG3F_ON

MONITOR_ON

CONT_PWRUP

PWR_HOLD

21h

PWR_SET

PWR_REG_ON

0: use reg 0x35

1: use reg 0x21h

HP_ON

MIC_ON

LIN_ON

MICS_CP_ON

MICS_ON

LOW_BAT

PWRUP_

COMPLETE

22h-2Fh

reserved

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