SI2414 SILABS [Silicon Laboratories], SI2414 Datasheet - Page 54

• Manufacturer Part Number: SI2414
• Manufacturer: SILABS [Silicon Laboratories]

Si2456/Si2433/Si2414
U69 ITC3
Reset settings = 0x0000
54
Notes:
Name
15:8
Type
Bit
1:0
Bit
7
6
5
4
3
2
1. See Table 19 on page 39
2. See "Appendix A—DAA Operation" on page 67
Reserved Read returns zero.
Reserved Do not modify. Must be set to zero.
Reserved Do not modify.
FLVM
D15 D14 D13 D12 D11 D10
VOL
MODE
Name
DIAL
FJM
1,2
1,2
DTMF Dialing Mode.
This bit should be set during DTMF dialing in CTR21 mode if LVCS < 12.
0 = Normal operation.
1 = Increase headroom for DTMF dialing.
Force Japan DC Termination Mode.
0 = Normal Gain.
1 = When DCT = 2 (FCC mode), setting this bit forces Japan dc termination mode while allow-
ing for a transmit level of –1 dBm. See "DTMF Dialing" on page 69.
Line Voltage Adjust.
When set, this bit adjusts the TIP-RING line voltage. Lowering this voltage improves margin in
low voltage countries. Raising this voltage may improve large signal distortion performance.
0 = Normal operation.
1 = Lower DCT voltage.
Force Low Voltage Mode.
When DCT (U67, bits 3:2) = 10 (FCC mode), setting FLVM forces the Low Voltage mode (see
DCT = 00) while allowing for a transmit level of –1 dBm.
0 = Disable.
1 = Enable.
Mode.
MODE = 1
modem can go off-hook, dial, or answer a call.
0 = Disable.
1 = Enable.
b
enables on-hook line monitor. MODE must be disabled (MODE = 0
D9
Rev. 0.9
D8
D7
Function
DIAL
R/W
D6
FJM
R/W
D5
VOL
R/W
D4
FLVM MODE
D3
D2
b
) before the
D1
D0