S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
BCP[15:0]
BCP[15:0] sets the number of cell interval between transfers of cells from the Input
Backward Cell Interface (IBCIF). The minimum rate of transfer is 1 in 65535 cell intervals.
When BCP[15:0] = 0x0000 back-to-back transfer from the Backward Cell Interface is
possible, if there are no transfer requested from the Input Cell Interface or the Microprocessor
Cell Interface. The default is set to 1 in 32 cell intervals. A cell interval is 22 SYSCLK
cycles.
BHBTO[15:0]
BHBTO[15:0] sets the timeout limit, in cell intervals, before a cell at the head of the
Backward Cell Interface FIFO is discarded. This is to prevent a malfunctioning PHY holding
a Backward Reporting PM cell or RDI cell at the head of the FIFO, thus blocking all others
cells that follow. Default is set to all zeros, which disables this timeout feature. A cell interval
is 22 SYSCLK cycles.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
206
PMC [ PMC-SIERRA, INC ]
