Rainbow Electronics DS3164 - Manual (Page 6)

Maxim/Dallas Semiconductor Confidential Product Preview: DS3161,2,3,4
Rev 1.6 6 of 12 022604
• Framer pass-through mode for clear channel applications and externally defined frame formats
• Built-in support for subrate DS3/E3
3.3 Receive PLCP Framer Features
• PLCP frame synchronization
• C1 cycle/stuff counter interpretation
• Detection of out of frame (OOF), BIP-8 errors, FEBE and RAI (Yellow Signal)
• Frame timing is presented on the 8KREFO output pin
• All path overhead fields presented on the PLCP receive overhead port
3.4 Receive Cell Processor Features
• HEC-based cell delineation within the DS3/E3 frame, the PLCP frame, an externally defined frame,
or the entire line bandwidth
• Cell descrambling using the self-synchronizing scrambler (x 43 +1) for ATM over DS3/E3 or the
distributed sample scrambler for clear-channel ATM (cell-based physical layer)
• HEC error detection and correction; HEC discard
• Filtering of idle, unassigned and/or invalid cells (provisionable)
• Header pattern comparison vs. 32-bit header pattern and mask registers; counting of matching or non-
matching cells; discard of matching or non-matching cells
• Four-cell Receive FIFO
• Controls include enables/disables/settings for: cell processing, coset polynomial addition, error
correction, erred cell extraction, cell descrambling, idle/unassigned/invalid cell filtering, header
pattern match counting/discarding, LCD integration time
• Status fields include: out of cell delineation (OCD), loss of cell delineation (LCD) and receipt of idle,
unassigned, invalid, erred, corrected or header-pattern-match cells
• Performance monitoring counters for forwarded cells, corrected cells, uncorrectable cells, header
pattern match/no-match cells, and filtered idle/unassigned/invalid cells
3.5 Receive Packet Processor Features
• Packet descrambling using the self-synchronizing scrambler (x 43 +1)
• Flag detection, packet delineation, and interframe fill discard (flags and all-ones)
• Packet abort detection and accumulation
• Bit or octet destuffing
• FCS checking (16-bit or 32-bit), error accumulation, and FCS discard
• Packet size checking vs. programmable minimum and maximum size registers
• Abort declaration for packets with non-integral number of bytes
• Controls include enables/disables/settings for: packet processing, descrambling, 16/32-bit FCS,
filtering of FCS erred packets, FCS discard, minimum/maximum packet size
• Status fields include: receipt of FCS erred packet, aborted packet, size violation packet, non-integer-
length packets
• Performance monitoring counters for forwarded packets, forwarded bytes, aborted bytes, FCS erred
packets, aborted packets, size violation packets (min, max, non-integer-length)
3.6 Receive FIFO Features
• Storage capacity for four cells or 256 bytes of packet data
• Programmable port address