![](http://datasheet.mmic.net.cn/330000/PM7341_datasheet_16444387/PM7341_121.png)
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7341 S/UNI-IMA-84
DATASHEET
PMC-2000223
ISSUE 4
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
123
All groups must have a unique value between 0 and 83.(0 to 30 for UTOPIA
L2 mode).
Note: The actual address used on the Any-PHY bus to access a particular
channel is a combination of the TX VPHY ID (bits 6:0) and the Tx Any-PHY
Address Config Reg(bits 15:7).
10.6.2 Interrupt Driven Error/Status Reporting
The interrupt logic has several layers. The top layer of the interrupt logic, the
Master Interrupt Register, indicates from which block the interrupt came. Once
the block is determined the processor can access the appropriate block to
determine the interrupt cause.
10.6.2.1
Line Interface Interrupts
The Line Interface sources three interrupts: SBI_DROP_INTR, SBI_ADD_INTR,
and SBI_ALARM_INTR. The SBI_DROP_INTR indicates there is an interrupt
pending related to the SBI-Drop bus, also known as the Extract SBI bus. The
Extract Master Interrupt Status Register needs to be read to determine the cause
of the interrupt. The SBI_ADD_INTR indicates there is an interrupt pending
related to the SBI-Add bus, also known as the Insert SBI bus. The Insert Master
Interrupt Status Register needs to be read to determine the cause of the
interrupt. The SBI_ALARM_INTR indicates that an alarm was detected on a link
from the SBI. The SBI Alarm Interrupt registers will identify which link failed.
10.6.2.2
TC Layer Interrupts
The TC layer sources 4 different interrupts that are reported through a FIFO
structure. As each interrupt occurs it is placed into a FIFO along with a Link
Identifier to uniquely identify the link. The error conditions reported through this
structure include HEC Errors, Loss of Cell Delineation (LCD) state change, Out
of Cell Delineation (OCD) state change, and Receive Link FIFO overflow. To
determine the actual states of LCD and OCD it is necessary to query the
individual link status. If this FIFO overflows, it is necessary to query the status of
all links in order to retrieve accurate state information.
10.6.2.3
IMA Interrupts
The IMA sub-layer sources four interrupts: RIPP_INTR, TIMA_INTR,
RDAT_INTR, and ICP_CELL_AVL. The RIPP_INTR indicates that either a status