DATASHEET
PM5349 S/UNI-QUAD
ISSUE 6 | SATURN USER NETWORK INTERFACE | |
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The pointer value is used to insert the path overhead into the transmit stream. The current pointer value may be read via internal registers.
10.10.2BIP-8 Calculate
The
10.10.3FEBE Calculate
The FEBE Calculate Block accumulates far end block errors on a per frame basis, and inserts the accumulated value (up to maximum value of eight) in the FEBE bit positions of the path status (G1) byte. The FEBE information is derived from path
10.11Transmit ATM Cell Processor (TXCP)
The Transmit ATM Cell Processor (TXCP) provides rate adaptation via idle/unassigned cell insertion, provides HCS generation and insertion, and performs ATM cell scrambling. The TXCP contains a four cell transmit FIFO. An idle or unassigned cell is transmitted if a complete ATM cell has not been written into the FIFO.
10.11.1Idle/Unassigned Cell Generator
The Idle/Unassigned Cell Generator inserts idle or unassigned cells into the cell stream when enabled. Registers are provided to program the GFC, PTI, and CLP fields of the idle cell header and the idle cell payload. The idle cell HCS is automatically calculated and inserted.
10.11.2Scrambler
The Scrambler scrambles the 48 octet information field. Scrambling is performed using a parallel implementation of the self synchronous scrambler (x43 + 1 polynomial) described in the references. The cell headers are transmitted unscrambled, and the scrambler may optionally be disabled.
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