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XRT79L71
PRELIMINARY
47
1-CHANNEL DS3/E3 CLEAR-CHANNEL FRAMERLIU COMBO - CC/HDLC ARCHITECTURE
REV. P2.0.0
The XRT79L71 ATM UNI/PPP/Clear-Channel DS3/E3 Framer device comes equipped with the following
registers to support the servicing of this wide array of potential interrupt request sources. Table 8 lists these
registers and their corresponding addresses, within the XRT79L71.
Receive ATM Cell/PPP Packet Proces-
sor Block
Receive ATM Cell Processor Block Interrupts
Receive Cell Extraction Event
Receive Cell Insertion Event
Receive Cell Insertion Memory Overflow Condition
Receive Cell Extraction Memory Overflow Condition
RxFIFO Overflow
Detection of Correctable HEC Byte Error
Detection of Uncorrectable HEC Byte Error
Declaration of the LCD (Loss of Cell Delineation) Defect Condition
Clearances of the LCD Defect Condition
Receive PPP Packet Processor Block Interrupts
Detection of Receive FIFO Overflow Condition
Detection of FCS (Frame Check Sequence) Error
Detection of ABORT Sequence
Detection of RUNT Packet
Transmit ATM Cell/PPP Packet Proces-
sor Block
Transmit ATM Cell Processor Block Interrupts
Transmit Cell Extraction Event
Transmit Cell Insertion Event
Transmit Cell Insertion Memory Overflow Condition
Transmit Cell Extraction Memory Overflow Condition
TxFIFO Overflow
Detection of HEC Byte Error
Detection of Transmit UTOPIA Parity Error
Transmit PPP Processor Block Interrupts
Detection of Transmit FIFO Overflow Condition
Detection of Transmit POS-PHY Interface Parity Error
TABLE 8: A LISTING OF THE XRT79L71 ATM UNI/PPP/CLEAR-CHANNEL DS3/E3 FRAMER DEVICE INTERRUPT
BLOCK REGISTERS - CLEAR-CHANNEL FRAMER APPLICATIONS
REGISTER
ADDRESS LOCATION
Operation Control Register
0x0101
Operation Interrupt Status Register - Byte 1
0x0112
Operation Interrupt Status Register - Byte 0
0x0113
Operation Interrupt Enable Register - Byte 1
0x0116
Operation Interrupt Enable Register - Byte 0
0x0117
TABLE 7: LIST OF ALL OF THE POSSIBLE CONDITIONS THAT CAN GENERATE INTERRUPTS WITHIN THE XRT79L71
WHEN CONFIGURED TO OPERATE IN THE
CLEAR-CHANNEL FRAMER MODE
FUNCTIONAL BLOCK
INTERRUPT CONDITION