si2401 Silicon Laboratories, si2401 Datasheet - Page 63

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

SF1 (DAA1). DAA Low Level Functions 1
Reset settings = 0000_1100 (0x0C)
Bit
1:0
Name
7
6
5
4
3
2
Type
Bit
Reserved
Reserved
Name
LVFD
PDN
HBE
BTE
PDL
BTE
R/W
D7
Billing Tone Enable.
When the line-side device detects a billing tone, SF9[3] (BTD) is set.
0 = Disable.
1 = Enable.
Powerdown.
0 = Normal operation.
1 = Powers down the Si2401.
Powerdown Line-Side Chip (typically only used for board level debug.)
0 = Normal operation. Program the clock generator before clearing this bit.
1 = Places the line-side device in lower power mode.
Line Voltage Force Disable.
0 = Normal operation.
1 = The circuitry that forces the LVS register to all 0s at 3 V or less is disabled. This reg-
ister may display unpredictable values at voltages between 0 to 2 V. All 0s are displayed
if the line voltage is 0 V.
Do not modify.
Hybrid Transmit Path Connect.
0 = Disable.
1 = Enable.
Do not modify.
PDN
R/W
D6
PDL
R/W
D5
Rev. 1.0
LVFD
R/W
D4
Function
D3
HBE
R/W
D2
D1
Si2401
D0
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