
Si2400
Rev. 1.3 41
Table 25 defines the relationship between SE5, SE6, and SE8.
0x000E UDFSL Sensitivity setting for UDFD1–4 detectors,
default = –43 dBm
Sensitivity = 10log
10
(UDFSL/
4096) – 43 dBm
4096
0x0024 CONL Carrier ON level. Carrier is valid once it
reaches this level.
Level = 20log
10
(2620/CONL) –
43 dBm
2620
0x0025 COFL Carrier OFF level. Carrier is invalid once it
falls below this level.
Level = 20log
10
(3300/COFL) –
45.5 dBm
3300
0x0026 AONL Answer ON level. Answer tone is valid once it
reaches this level.
Level = 10log
10
(AONL/107) –
43 dBm
67
0x0027 AOFL Answer OFF level. Answer tone is invalid
once it fall below this level.
Level = 10log
10
(AOFL/58) –
45.5 dBm
37
Table 25. SE5, SE6, and SE8 Relationship
SE8 SE6 SE5
R/W Name Description Name Description
0x00 W DADH DSP register address bits [15:8] DADL DSP register address bits [7:0]
0x01 W DDH DSP register data bits [15:8] DDL DSP register data bits [7:0]
0x02 R DSP1 7 = DSP data available.
6 = Tone detected.
5=Reserved.
4:0 = Tone type.
0x02 W DSP3 7 = Enable squaring function.
6 = Call progress cascade disable.
5=Reserved.
4 = User tone 3 and 4 reporting.
3 = User tone 1 and 2 reporting.
2 = V.23 tone reporting.
1 = Answer tone reporting.
0 = DTMF tone reporting.
DSP2 7 = Reserved.
6:3 = DTMF tone to transmit.
2:0 = Tone type.
Table 24. Low-Level DSP Parameters (Continued)
DSP Reg. Addr.
Name Description Function Default
(dec)
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