XRT79L71IB datasheet(77/109 Pages) EXAR

77 / 109 page

XRT79L71

REV. 1.0.0

1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE

TABLE 3: LIST OF ALL OF THE POSSIBLE CONDITIONS THAT CAN GENERATE INTERRUPTS WITHIN THE XRT79L71

FUNCTIONAL BLOCK

INTERRUPT CONDITION

DS3/E3 Framer Block (Consists of both

the Transmit DS3/E3 Framer Block, the

Transmit PLCP Processor Block, the

Receive DS3/E3 Framer Block and the

Receive PLCP Processor Block)

Transmit DS3/E3 Framer Block Interrupts

• Completion of Transmission of FEAC Message (DS3,C-bit Parity Only)

• Completion of Transmission of LAPD/PMDL Message

Transmit PLCP Processor Block Interrupts

• None

Receive DS3/E3 Framer Block Interrupts

• Change of LOS (Loss of Signal) Defect Condition

• Change of OOF (Out of Frame) Defect Condition

• Change of AIS Defect Condition

• Change in Trail-Trace Buffer Message (E3, ITU-T G.832 only)

• Change of FERF/RDI (Yellow Alarm) Defect Condition

• Detection of P-Bit Errors (DS3 Applications only)

• Detection of CP-Bit Errors (DS3, C-bit Parity Applications only)· Detection of

BIP-4 Error (E3, ITU-T G.751 only)

• Detection of BIP-8 Error (E3, ITU-T G.832 only)· Detection of FEBE (Far-End

Block Error) Event

• Validation of FEAC Message (DS3, C-bit Parity Only)·

• Removal of FEAC Message (DS3, C-bit Parity Only)

• Receipt of New LAPD/PMDL Message

• One Second Interrupt

Receive PLCP Processor Block Interrupts

• Change of PLCP OOF Defect Condition

• Change of PLCP LOF Defect Condition

• Change of PLCP RAI Defect Condition

DS3/E3 LIU Block

• Change of FL (Jitter Attenuator FIFO Limit Alarm) Condition

• Change of LOL (Receive Loss of Lock) Condition

• Change of LOS (Loss of Signal) Condition

• Change of DMO (Transmit Drive Monitor Output) Condition

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