
Si2400
Rev. 1.3 73
Reset settings = 0000_1111
b
(0x0F)
SF4 (DAA4). DAA Low Level Functions 4
BitD7D6D5D4D3D2D1D0
Name
SQLH ARG ARL ATL
Type R/W R/W R/W R/W
Bit Name Function
7SQLHRing Squelch.
If the host implements a manual ring detect (bypassing the Si2400 micro), this bit must
be set, then cleared following a polarity reversal detection. Used to quickly recover offset
on RNG1/2 pins after polarity reversal.
0 = Normal.
1 = Squelch.
6:4 ARG
Analog Receive Gain.
Off-Hook On-Hook
000 = 0 dB gain 000 = 7 dB
001 = 3 dB gain 001 = 6 dB
010 = 6 dB gain 010 = 4.8 dB
011 = 9 dB gain 011 = 3.5 dB
1xx = 12 dB gain 1xx = 2.0 dB
3:2 ARL
AOUT Receive—Path Level.
DAA receive path signal AOUT gain.
00 = 0 dB
01 = –6 dB
10 = –12 dB*
11 = Mute
1:0 ATL AOUT Transmit—Path Level.
DAA transmit path signal AOUT gain.
00 = –18 dB
01 = –24 dB
10 = –30 dB*
11 = Mute
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