XRT86VL30_1 Datasheet, PDF(113/175 Page) Exar Corporation – SINGLE T1/E1/J1 FRAMER/LIU COMBO

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XRT86VL30_1 Datasheet, PDF (113/175 Pages) Exar Corporation – SINGLE T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

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REV. 1.0.0

XRT86VL30

SINGLE T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

TABLE 98: FRAMER INTERRUPT ENABLE REGISTER (FIER)

HEX ADDRESS: 0X0B05

BIT

FUNCTION

TYPE DEFAULT

DESCRIPTION-OPERATION

5 SIG_ENB

R/W

Change in Signaling Bits Interrupt Enable

This bit permits the user to either enable or disable the âChange in Sig-

naling Bitsâ Interrupt, within the XRT86VL30 device. If the user enables

this interrupt, then the Receive T1 Framer block will generate an inter-

rupt when it detects a change in the any four signaling bits (A,B,C,D) in

any one of the 24 signaling channels. Users can read the signaling

change registers (address 0x010D-0x010F) to determine which signal-

ling channel has changed state.

0 - Disables the Change in Signaling Bits Interrupt

1 - Enables the Change in Signaling Bits Interrupt

NOTE: This bit has no meaning when Robbed-Bit Signaling is disabled.

4 COFA_ENB

R/W

Change of Framing Alignment (COFA) Interrupt Enable

This bit permits the user to either enable or disable the âChange in FAS

Framing Alignment (COFA)â Interrupt, within the XRT86VL30 device. If

the user enables this interrupt, then the Receive T1 Framer block will

generate an interrupt when it detects a Change of Framing Alignment

Signal (e.g., the Framing bits have appeared to move to a different

location within the incoming T1 data stream).

0 - Disables the âChange of Framing Alignment (COFA)â Interrupt.

1 - Enables the âChange of Framing Alignment (COFA)â Interrupt.

3 OOF_ENB

R/W

Change in Out of Frame Defect Condition interrupt enable

This bit permits the user to either enable or disable the âChange in Out

of Frame Defect Conditionâ Interrupt, within the XRT86VL30 device. If

the user enables this interrupt, then the Receive T1 Framer block will

generate an interrupt in response to either one of the following condi-

tions.

1. The instant that the Receive T1 Framer block declares the Out of

Frame defect condition.

2. The instant that the Receive T1 Framer block clears the Out of

Frame defect condition.

0 â Disables the âChange in Out of Frame Defect Conditionâ Interrupt.

1 â Enables the âChange in Out of Frame Defect Conditionâ Interrupt.

2 FMD_ENB

R/W

Frame Mimic Detection Interrupt Enable

This bit permits the user to either enable or disable the âFrame Mimic

Detectionâ Interrupt, within the XRT86VL30 device. If the user enables

this interrupt, then the Receive T1 Framer block will generate an inter-

rupt when it detects the presence of Frame mimic bits (i.e., the payload

bits have appeared to mimic the framing bit pattern within the incoming

T1 data stream).

0 - Disables the âFrame Mimic Detectionâ Interrupt.

1 - Enables the âFrame Mimic Detectionâ Interrupt.

108

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