SI2456 datasheet(60/86 Pages) SILABS

Part #	SI2456

Description	V.90, V.34, V.32BIS ISOMODEM??WITH INTEGRATED GLOBAL DAA

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Manufacturer	SILABS [Silicon Laboratories]

Direct Link	http://www.silabs.com

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60 / 86 page

Si2456/Si2433/Si2414

60

Rev. 0.9

Reset settings = 0x401E

U77 GEN2

Bit

D15 D14 D13 D12

D11

D10

D9

D8D7D6D5D4

D3D2

D1D0

Name

IST

HOI

AOC

OHT

Type

R/W

Bit

Name

Function

15:12

IST

Intrusion Settling Time (250 ms units).

Delay between when the ISOmodem goes off-hook and the off-hook intrusion algorithm

begins. Default is 1 second.

11

HOI

Hang-Up On Intrusion.

0 = ISOmodem will not automatically hang up when an off-hook PPD interrupt occurs.

1 = ISOmodem automatically hangs up on a PPD interrupt.

10

Reserved Read returns zero.

9AOC

Overcurrent Protection.

Enable Overcurrent protection.

0 = Disable.

1 = Enable.

Note: AOC may falsely detect an overcurrent condition in the presence of line reversals or other

transients. Therefore, this feature should not be used in applications or locations (such as

Japan) where line reversals are common or may be expected.

8:0

OHT

Off-Hook Time (1 ms units).

Time before LVCS is checked for overcurrent condition after going off-hook (30 ms default).

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