![](http://datasheet.mmic.net.cn/Silicon-Laboratories-Inc/SI2400-BS_datasheet_102083/SI2400-BS_72.png)
Si2400
72
Rev. 1.3
Reset settings = 0001_1100b (0x1C)
Reset settings = 0000_0000b (0x00)
SF1 (DAA1). DAA Low Level Functions 1
Bit
D7D6D5D4D3
D2
D1
D0
Name
BTE
PDN
PDL
HBE
Type
R/W
Bit
Name
Function
7BTE
Billing Tone Enable.
When the Si3015 detects a billing tone, SF9[3] (BTD) is set.
0 = Disable.
1 = Enable.
6PDN
Power Down.
0 = Normal operation.
1 = Powers down the Si2400.
5PDL
Power Down Line-Side Chip (typically only used for board level debug.)
0 = Normal operation. Program the clock generator before clearing this bit.
1 = Places the Si3015 in lower power mode.
4:3
Reserved
Do Not Modify
2HBE
Hybrid Transmit Path Connect.
0=Disable.
1=Enable.
1:0
Reserved
Do Not Modify
SF2 (DAA2). DAA Low Level Functions 2
Bit
D7D6D5D4D3
D2
D1
D0
Name
FDT
Type
R
Bit
Name
Function
7:4
Reserved
Read only.
3FDT
Frame Detect (Typically only used for board-level debug.)
1 = Indicates link frame lock has been established.
0 = Indicates link frame lock has not been established.
2:0
Reserved