AS3668 datasheet(32/60 Pages) AMSCO

32 / 60 page

www.austriamicrosystems.com/AS3668

Revision 1.11

32 - 60

AS3668

Data Sheet - D e t a i l e d D e s c r i p t i o n

8.9.1

Audio Control Register . .

Table 28. Audio AGC Register

0x40 Audio AGC Register

Bit

Bit Name

Default

Access

Bit Description

agc_up_level

R/W

This bit allows the change of the AGC up switching threshold.

0: Default AGC up switching threshold

1: Increased AGC up switching threshold

agc_down_level

R/W

This bit allows the change of the AGC down switching threshold.

0: Default AGC down switching threshold

1: Increased AGC down switching threshold

4:3

decay_agc_down

R/W

Defines the decay time for the automatic gain control of the audio input

amplifier for decreasing the gain.

00: 0.131s

01: 0.262s

10: 0.393s

11: 0.524s

2:1

decay_agc_up

R/W

Defines the decay time for the automatic gain control of the audio input

amplifier for increasing the gain.

00: 0.262s

01: 0.524s

10: 0.786s

11: 1.049s

agc_on

R/W

This bit allows the user the enable / disable the automatic gain control of the

audio input amplifier.

0: Automatic Gain Control off

1: Automatic Gain Control on

Table 29. Audio Input Buffer Register

0x41 Audio Input Buffer Register

Bit

Bit Name

Default

Access

Bit Description

audio_dis_start

R/W

Enables the audio input capacitor precharging. This function is only active if

0: Input capacitor precharging enabled

1: Input capacitor precharging disabled

audio_man_start

R/W

Configures the input capacitor precharging mechanism for auto precharging

or manual precharging.

0: Automatic Precharging

1: Manual Precharging

5:1

audio_gain

R/W

Configures the gain of the audio preamplifier. The gain can be configured in

the range of -6dB up to +25dB according to the register setting in 1dB steps.

0 0000: -6dB

0 0001: -5dB

0 0010: -4dB

0 0011: -3dB

...

1 1111: 25dB

aud_buf_on

R/W

This bit switches the internal audio buffer amplifier on and off according to

the register setting

0: Audio Buffer off

1: Audio Buffer on

AS3668 Datasheet(PDF) 32 Page - ams AG

AS3668 Datasheet(HTML) 32 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL