si2401 Silicon Laboratories, si2401 Datasheet - Page 56

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

Si2401
SE5 (DSP2). (SE8 = 0x02) Write Only Definition
Reset settings N/A
56
Bit
6:3
2:0
7
Name
Type
Bit
TONC[2:0]
Reserved
DTM[3:0]
Name
D7
Always write zero.
Tone Type Generated.
DTMF tone (0–15) to transmit when selected by TONC = 001. See Table 17 on page 31.
DTMF Tone Selector.
ToneTone Type
000
001
010
011
100
101
110
111
D6
D5
DTM[3:0]
W
Mute
DTMF
2225 Hz Bell mode answer tone with phase reversal
2100 Hz CCITT mode answer tone with phase reversal
2225 Hz Bell mode answer tone without phase reversal
2100 Hz CCITT mode answer tone without phase reversal
User-defined programmable frequency tone (UFRQ)
(see Table 18 on page 32, default = 1700 Hz)
1300 Hz V.25 calling tone
Rev. 1.0
D4
Function
D3
D2
TONC[2:0]
D1
W
D0