PM7345S Datasheet, PDF (165/306 Pages) PMC-Sierra, Inc – SATURN USER-NETWORK INTERFACE FOR ATM PLESIOCHRONOUS DIGITAL HIERARCHY DATACOM

DATA SHEET
PMC-931011
ISSUE 6
PM7345 S/UNI-PDH
SATURN USER-NETWORK INTERFACE
LCD:
The LCD bit indicates the state of the Loss of Cell Delineation indication. When
LCD is logic 1, an out of cell delineation (OCD) defect has persisted for 4ms.
When LCD is logic 0, no OCD has persisted for 4ms.
LCDI:
The LCDI bit is set to logic 1 when the state of loss of cell delineation (LCD) has
changed. The LCDI bit position is set to logic 0 when this register is read.
LCDE:
The LCDE bit enables the generation of an interrupt when the LCD state
changes. When a logic 1 is written to the LCDE bit position, the interrupt
generation is enabled.
REMPTY4:
The REMPTY4 bit selects the amount of advance indication given on the receive
cell available (RCA) signal. When REMPTY4 is logic 1, RCA is deasserted when
the receive FIFO is almost empty and can accept no more than four byte read
requests before underflowing. When REMPTY4 is logic 0, RCA is deasserted to
logic 0 when the receive FIFO is empty and can accept no more read requests
before underflowing (if a read request is made while RCA is low, an underflow
indication is asserted but the read request is ignored).
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 151