si2401 Silicon Laboratories, si2401 Datasheet - Page 55

• Manufacturer Part Number: si2401
• Description: V.22bis Isomodem With Integrated Global Daa
• Manufacturer: Silicon Laboratories

SE5 (DSP1). (SE8 = 0x02) Read Only Definition
Reset settings N/A
Notes:
Bit
4:0
7
6
5
Name
Type
1. SE6[0] (DTMFE) SE8 = 0x02.
2. SE6[1] (ANSE) SE8 = 0x02.
3. SE6[2] (V23E) SE8 = 0x02.
4. SE6[3] (USEN1) SE8 = 0x02.
5. SE6[4] (USEN2) SE8 = 0x02.
Bit
TONE[4:0]
Reserved
Name
DDAV
TDET
DDAV
D7
R
DSP Data Available.
Tone Detected.
Indicates a TONE (any of type 0–25 below) has been detected.
0 = Not detected.
1 = Detected.
Read returns zero.
Tone Type Detected.
When TDET goes high, TONE indicates which tone has been detected from the following:
TONE
00000–01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
TDET
D6
R
Tone Type
DTMF 0–15 (DTMFE = 1)
Answer tone detected 2100 Hz (ANSE = 1)
Bell 103 answer tone detected 2225 Hz (ANSE = 1)
V.23 forward channel mark 1300 Hz (V23E = 1)
V.23 backward channel mark 390 Hz (V23E = 1)
User defined frequency 1 (USEN1 = 1)
User defined frequency 2 (USEN1 = 1)
Call progress filter A detected
User defined frequency 3 (USEN2 = 1)
User defined frequency 4 (USEN2 = 1)
Call progress filter B detected
D5
Rev. 1.0
D4
Function
1
See Table 17 on page 31.
D3
TONE[4:0]
4
5
D2
R
2
3
D1
Si2401
Priority
1
2
2
3
3
4
4
6
5
5
6
D0
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