Datasheet


SLAS412− DECEMBER 2003
www.ti.com
43
REGISTER 03H: CODEC Sidetone Control
BIT NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15 ASTMU R/W 1 Analog Sidetone Mute Control
1 => Analog sidetone muted
0 => Analog sidetone not muted
D14−D8 ASTG R/W 1000101 Analog Sidetone Gain Setting
0000000 => Analog sidetone gain setting = −34.5 dB
0000001 => Analog sidetone gain setting = −34 dB
0000010 => Analog sidetone gain setting = −33.5 dB
−−−−−
1000101 => Analog sidetone gain setting = 0 dB
1000110 => Analog sidetone gain setting = 0.5 dB
−−−−−
1011100 => Analog sidetone gain setting = 11.5 dB
1011101 => Analog sidetone gain setting = 12 dB
1011110 => Analog sidetone gain setting = 12 dB
1011111 => Analog sidetone gain setting = 12 dB
−−−−−
11xxxxx => Analog sidetone gain setting = 12 dB
D7 DSTMU R/W 1 Digital Sidetone Mute Control
1 => Digital sidetone muted
0 => Digital sidetone not muted
D6−D1 DSTG R/W 000000 Digital Sidetone Setting
000000 => Digital sidetone gain = 0 dB
000001 => Digital sidetone gain = −1.5 dB
000010 => Digital sidetone gain = −3.0 dB
−−−−−
1xxxxx => Digital sidetone gain = −48 dB
Note: Digital sidetone setting applied at zero cross over
D0 ASTGF R 0 Analog Sidetone PGA Flag ( Read Only )
0 => Gain applied /= PGA register setting
1 => PGA applied = PGA register setting.
Note: Analog sidetone gain is implemented at zero crossings of the signal.