PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
LINE_EN
Indicates when the LINE_MODE has been set-up and enables the line side
traffic flow.
CTSCLK_SEL
When set and LINE_MODE=”10”, this selects the CTS_CLK pin to be used as
the clock for all Transmit Serial Line Clocks.
MAX_DCB_DEPTH:
This indicates the number of cells that can be stored for a single link in the
external SDRAM. This determines the number of bits the RDAT will use for
the read and write pointers. To ensure correct operation, the user must
ensure that the proper amount of SDRAM is available. See section 12.6.2 for
details.
0) 256 cells per link
1) 1024 cells per link
CHAN_CD:
This indicates that the channelized cell delineation may be used.
Channelized cell delineation results in faster cell delineation since an octet by
octet search is performed instead of a bit by bit search. This option may only
be used when operating with the clk/data interface in channelized mode. If
any links are operating in unchannelized mode, this bit may not be set.
0) Use bit by bit search for cell delineation. (Safe mode)
1) Use octet search for cell delineation (only should be set if operating with
channelized line interface for all links
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
100
PMC [ PMC-SIERRA, INC ]
