SI3068 Datasheet, PDF (30/40 Pages) Silicon Laboratories – FCC+ EMBEDDED DIRECT ACCESS ARRANGEMENT

Si3068
DAA Register 20. Call Progress Receive Attenuation
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
ARM[7:0]
Type
R/W
Reset settings = xxxx_0000
Bit
Name
Function
7:0 ARM[7:0] ^{AOUT Receive Path Attenuation.}
When decremented from the default setting, these bits linearly attenuate the AOUT
receive path signal used for call progress monitoring. Setting the bits to 0s mutes the
AOUT receive path.
0111_1111 = +6 dB (gain)
0100_0000 = 0 dB
0010_0000 = –6 dB (attenuation)
0001_0000 = –12 dB
...
0000_0000 = Mute
DAA Register 21. Call Progress Transmit Attenuation
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
ATM[7:0]
Type
R/W
Reset settings = xxxx_0000
Bit
Name
Function
7:0 ATM[7:0] AOUT Transmit Path Attenuation.
When decremented from the default setting, these bits linearly attenuate the AOUT trans-
mit path signal used for call progress monitoring. Setting the bits to 0s mutes the AOUT
transmit path.
0111_1111 = +6 dB (gain)
0100_0000 = 0 dB
0010_0000 = –6 dB (attenuation)
0001_0000 = –12 dB
...
0000_0000 = Mute
30
Rev. 1.0