SI2404 SILABS [Silicon Laboratories], SI2404 Datasheet - Page 57

• Manufacturer Part Number: SI2404
• Description: V.90, V.34, V.32BIS, V.22BIS ISOMODEM WITH GLOBAL DAA
• Manufacturer: SILABS [Silicon Laboratories]

U71 IO1
Reset settings = 0x0000
U76 GEN1
Reset settings = 0x3240
Name
Name
15:5
15:9
Type
Type
Bit
3:1
Bit
7:5
4:0
Bit
Bit
4
0
8
OHSR[6:0] Off-Hook Sample Rate (40 ms units).
Reserved Read returns zero.
Reserved Read returns zero.
D15 D14 D13 D12 D11 D10
D15
DCL[2:0]
ACL[4:0]
COMP
Name
Name
FACL
PRT
D14
0 = Disables compression (PCM mode).
1 = Enables linear compression.
0 = Disables PCM mode.
1 = Enables PCM mode.
Sets the sample rate for the off-hook intrusion algorithms (1 second default).
Force ACL.
0 = While off-hook, ACL is automatically updated with LVCS.
1 = While off-hook, ACL does not change from the value written to it while on-hook.
Differential Current Level (3 mA units).
Sets the differential level between ACL and LVCS that will trigger an off-hook PPD interrupt
(default = 2).
Absolute Current Level (3 mA units).
ACL represents the value of LVCS current when the ISOmodem® is off-hook and all parallel
phones are on-hook. If ACL = 0, it is ignored by the off-hook intrusion algorithm.The ISOmo-
dem will also write ACL with the contents of LVCS before an intrusion and before going on-
hook (default = 0).
D13
OHSR[6:0]
R/W
D12
D11
D10
D9
D9
D8
Rev. 1.0
FACL
D8
D7
Function
Function
D7
D6
DCL[2:0]
R/W
D6
D5
COMP
D5
R/W
Si2457/34/15/04
D4
D4
D3
D3
D2
ACL[4:0]
R/W
D2
D1
D1
PRT
R/W
D0
D0
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